Move macosx-setup.sh to tools and remove the "x".

The OS is now called just macOS, and the rest of the setup scripts are
in tools, so move this one there as well.

Update the documentation to reflect the change.

Change-Id: I4d9ebf0797ffe8862e82c4bcfdeec1d2eabae6ae
Reviewed-on: https://code.wireshark.org/review/22918
Reviewed-by: Guy Harris <guy@alum.mit.edu>

2 files changed, 3078 insertions, 0 deletions

diff --git a/tools/Makefile.am b/tools/Makefile.am
index 3b2291a5b9..43a0cb0508 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -60,6 +60,7 @@ EXTRA_DIST = \
 	lex.py						\
 	licensecheck.pl					\
 	list_protos_in_cap.sh				\
+	macos-setup.sh					\
 	make-dissector-reg.py				\
 	make-manuf					\
 	make-sminmpec.pl				\
diff --git a/tools/macos-setup.sh b/tools/macos-setup.sh
new file mode 100755
index 0000000000..8c9cb7d6ce
--- /dev/null
+++ b/tools/macos-setup.sh
@@ -0,0 +1,3077 @@
+#!/bin/sh
+# Setup development environment on macOS (tested with 10.6.8 and Xcode
+# 3.2.6 and with 10.12.4 and Xcode 8.3).
+#
+# Copyright 2011 Michael Tuexen, Joerg Mayer, Guy Harris (see AUTHORS file)
+#
+# Wireshark - Network traffic analyzer
+# By Gerald Combs <gerald@wireshark.org>
+# Copyright 1998 Gerald Combs
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+#
+# To install cmake
+#
+CMAKE=1
+#
+# To install autotools
+#
+AUTOTOOLS=1
+#
+# To build all libraries as 32-bit libraries uncomment the following three lines.
+#
+# export CFLAGS="$CFLAGS -arch i386"
+# export CXXFLAGS="$CXXFLAGS -arch i386"
+# export LDFLAGS="$LDFLAGS -arch i386"
+#
+# and change "macx-clang" to "macx-clang-32" in the line below.
+#
+# Note: when building against the 10.6 SDK, clang fails, because there's
+# a missing libstdc++.dylib in the SDK; this does not bother g++, however.
+#
+#TARGET_PLATFORM=macx-g++
+TARGET_PLATFORM=macx-clang
+
+#
+# Versions of packages to download and install.
+#
+
+#
+# Some packages need xz to unpack their current source.
+# While tar, in newer versions of macOS, can uncompress xz'ed tarballs,
+# it can't do so in older versions, and xz isn't provided with macOS.
+#
+XZ_VERSION=5.0.8
+
+#
+# Some packages need lzip to unpack their current source.
+#
+LZIP_VERSION=1.19
+
+#
+# In case we want to build with cmake.
+#
+CMAKE_VERSION=${CMAKE_VERSION-2.8.12.2}
+
+#
+# The following libraries and tools are required even to build only TShark.
+#
+GETTEXT_VERSION=0.18.2
+GLIB_VERSION=2.36.0
+PKG_CONFIG_VERSION=0.28
+#
+# libgpg-error is required for libgcrypt.
+#
+LIBGPG_ERROR_VERSION=1.27
+#
+# libgcrypt is required.
+#
+LIBGCRYPT_VERSION=1.7.7
+
+#
+# One or more of the following libraries are required to build Wireshark.
+#
+# To override the version of Qt or build the deprecated GTK interface call
+# the script with some of the variables set to the new values. Setting a
+# variable to empty will disable building the toolkit and will uninstall
+# any version previously installed by the script, e.g.
+# "GTK_VERSION=3.5.2 QT_VERSION= ./macos-setup.sh"
+# will build and install with GTK+ 3.5.2 and will not install Qt (and,
+# if the script installed Qt earlier, will un-install that version of Qt).
+#
+# Note that Qt 5, prior to 5.5.0, mishandles context menus in ways that,
+# for example, cause them not to work reliably in the packet detail or
+# packet data pane; see, for example, Qt bugs QTBUG-31937, QTBUG-41017,
+# and QTBUG-43464, all of which seem to be the same bug.
+#
+QT_VERSION=${QT_VERSION-5.8.0}
+#GTK_VERSION=${GTK_VERSION-2.24.17}
+if [ "$GTK_VERSION" ]; then
+    #
+    # We'll be building GTK+, so we need some additional libraries.
+    #
+    GTK_MAJOR_VERSION="`expr $GTK_VERSION : '\([0-9][0-9]*\).*'`"
+    GTK_MINOR_VERSION="`expr $GTK_VERSION : '[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+    GTK_DOTDOT_VERSION="`expr $GTK_VERSION : '[0-9][0-9]*\.[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+
+    ATK_VERSION=2.8.0
+    PANGO_VERSION=1.30.1
+    PNG_VERSION=1.6.20
+    PIXMAN_VERSION=0.26.0
+    CAIRO_VERSION=1.12.2
+    GDK_PIXBUF_VERSION=2.28.0
+fi
+if [ "$QT_VERSION" ]; then
+    QT_MAJOR_VERSION="`expr $QT_VERSION : '\([0-9][0-9]*\).*'`"
+    QT_MINOR_VERSION="`expr $QT_VERSION : '[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+    QT_DOTDOT_VERSION="`expr $QT_VERSION : '[0-9][0-9]*\.[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+    QT_MAJOR_MINOR_VERSION=$QT_MAJOR_VERSION.$QT_MINOR_VERSION
+    QT_MAJOR_MINOR_DOTDOT_VERSION=$QT_MAJOR_VERSION.$QT_MINOR_VERSION.$QT_DOTDOT_VERSION
+fi
+
+#
+# The following libraries are optional.
+# Comment them out if you don't want them, but note that some of
+# the optional libraries are required by other optional libraries.
+#
+LIBSMI_VERSION=0.4.8
+GNUTLS_VERSION=3.4.17
+if [ "$GNUTLS_VERSION" ]; then
+    #
+    # We'll be building GnuTLS, so we may need some additional libraries.
+    # We assume GnuTLS can work with Nettle; newer versions *only* use
+    # Nettle, not libgcrypt.
+    #
+    GNUTLS_MAJOR_VERSION="`expr $GNUTLS_VERSION : '\([0-9][0-9]*\).*'`"
+    GNUTLS_MINOR_VERSION="`expr $GNUTLS_VERSION : '[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+    GNUTLS_DOTDOT_VERSION="`expr $GNUTLS_VERSION : '[0-9][0-9]*\.[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+    NETTLE_VERSION=3.3
+
+    #
+    # And, in turn, Nettle requires GMP.
+    #
+    GMP_VERSION=6.1.2
+fi
+# Use 5.2.4, not 5.3, for now; lua_bitop.c hasn't been ported to 5.3
+# yet, and we need to check for compatibility issues (we'd want Lua
+# scripts to work with 5.1, 5.2, and 5.3, as long as they only use Lua
+# features present in all three versions)
+LUA_VERSION=5.2.4
+PORTAUDIO_VERSION=pa_stable_v19_20111121
+SNAPPY_VERSION=1.1.3
+LIBXML2_VERSION=2.9.4
+LZ4_VERSION=r131
+SBC_VERSION=1.3
+GEOIP_VERSION=1.6.10
+CARES_VERSION=1.12.0
+LIBSSH_VERSION=0.7.3
+NGHTTP2_VERSION=1.14.0
+SPANDSP_VERSION=0.0.6
+if [ "$SPANDSP_VERSION" ]; then
+    #
+    # SpanDSP depends on libtiff.
+    #
+    LIBTIFF_VERSION=3.8.1
+fi
+BCG729_VERSION=1.0.2
+
+DARWIN_MAJOR_VERSION=`uname -r | sed 's/\([0-9]*\).*/\1/'`
+
+#
+# GNU autotools; they're provided with releases up to Snow Leopard, but
+# not in later releases, and the Snow Leopard version is too old for
+# current Wireshark, so we install them unconditionally.
+#
+AUTOCONF_VERSION=2.69
+AUTOMAKE_VERSION=1.13.3
+LIBTOOL_VERSION=2.4.6
+
+install_xz() {
+    if [ "$XZ_VERSION" -a ! -f xz-$XZ_VERSION-done ] ; then
+        echo "Downloading, building, and installing xz:"
+        [ -f xz-$XZ_VERSION.tar.bz2 ] || curl -L -O http://tukaani.org/xz/xz-$XZ_VERSION.tar.bz2 || exit 1
+        $no_build && echo "Skipping installation" && return
+        bzcat xz-$XZ_VERSION.tar.bz2 | tar xf - || exit 1
+        cd xz-$XZ_VERSION
+        CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=0" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch xz-$XZ_VERSION-done
+    fi
+}
+
+uninstall_xz() {
+    if [ ! -z "$installed_xz_version" ] ; then
+        echo "Uninstalling xz:"
+        cd xz-$installed_xz_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm xz-$installed_xz_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf xz-$installed_xz_version
+            rm -rf xz-$installed_xz_version.tar.bz2
+        fi
+
+        installed_xz_version=""
+    fi
+}
+
+install_lzip() {
+    if [ "$LZIP_VERSION" -a ! -f lzip-$LZIP_VERSION-done ] ; then
+        echo "Downloading, building, and installing lzip:"
+        [ -f lzip-$LZIP_VERSION.tar.gz ] || curl -L -O http://download.savannah.gnu.org/releases/lzip/lzip-$LZIP_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat lzip-$LZIP_VERSION.tar.gz | tar xf - || exit 1
+        cd lzip-$LZIP_VERSION
+        ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch lzip-$LZIP_VERSION-done
+    fi
+}
+
+uninstall_lzip() {
+    if [ ! -z "$installed_lzip_version" ] ; then
+        echo "Uninstalling lzip:"
+        cd lzip-$installed_lzip_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm lzip-$installed_lzip_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf lzip-$installed_lzip_version
+            rm -rf lzip-$installed_lzip_version.tar.gz
+        fi
+
+        installed_lzip_version=""
+    fi
+}
+
+install_autoconf() {
+    if [ "$AUTOCONF_VERSION" -a ! -f autoconf-$AUTOCONF_VERSION-done ] ; then
+        echo "Downloading, building and installing GNU autoconf..."
+        [ -f autoconf-$AUTOCONF_VERSION.tar.xz ] || curl -L -O ftp://ftp.gnu.org/gnu/autoconf/autoconf-$AUTOCONF_VERSION.tar.xz || exit 1
+        $no_build && echo "Skipping installation" && return
+        xzcat autoconf-$AUTOCONF_VERSION.tar.xz | tar xf - || exit 1
+        cd autoconf-$AUTOCONF_VERSION
+        ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch autoconf-$AUTOCONF_VERSION-done
+    fi
+}
+
+uninstall_autoconf() {
+    if [ ! -z "$installed_autoconf_version" ] ; then
+        #
+        # automake and libtool depend on this, so uninstall them.
+        #
+        uninstall_libtool
+        uninstall_automake
+
+        echo "Uninstalling GNU autoconf:"
+        cd autoconf-$installed_autoconf_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm autoconf-$installed_autoconf_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf autoconf-$installed_autoconf_version
+            rm -rf autoconf-$installed_autoconf_version.tar.xz
+        fi
+
+        installed_autoconf_version=""
+    fi
+}
+
+install_automake() {
+    if [ "$AUTOMAKE_VERSION" -a ! -f automake-$AUTOMAKE_VERSION-done ] ; then
+        echo "Downloading, building and installing GNU automake..."
+        [ -f automake-$AUTOMAKE_VERSION.tar.xz ] || curl -L -O ftp://ftp.gnu.org/gnu/automake/automake-$AUTOMAKE_VERSION.tar.xz || exit 1
+        $no_build && echo "Skipping installation" && return
+        xzcat automake-$AUTOMAKE_VERSION.tar.xz | tar xf - || exit 1
+        cd automake-$AUTOMAKE_VERSION
+        ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch automake-$AUTOMAKE_VERSION-done
+    fi
+}
+
+uninstall_automake() {
+    if [ ! -z "$installed_automake_version" ] ; then
+        #
+        # libtool depends on this(?), so uninstall it.
+        #
+        uninstall_libtool "$@"
+
+        echo "Uninstalling GNU automake:"
+        cd automake-$installed_automake_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm automake-$installed_automake_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf automake-$installed_automake_version
+            rm -rf automake-$installed_automake_version.tar.xz
+        fi
+
+        installed_automake_version=""
+    fi
+}
+
+install_libtool() {
+    if [ "$LIBTOOL_VERSION" -a ! -f libtool-$LIBTOOL_VERSION-done ] ; then
+        echo "Downloading, building and installing GNU libtool..."
+        [ -f libtool-$LIBTOOL_VERSION.tar.xz ] || curl -L -O ftp://ftp.gnu.org/gnu/libtool/libtool-$LIBTOOL_VERSION.tar.xz || exit 1
+        $no_build && echo "Skipping installation" && return
+        xzcat libtool-$LIBTOOL_VERSION.tar.xz | tar xf - || exit 1
+        cd libtool-$LIBTOOL_VERSION
+        ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        $DO_MV /usr/local/bin/libtool /usr/local/bin/glibtool
+        $DO_MV /usr/local/bin/libtoolize /usr/local/bin/glibtoolize
+        cd ..
+       touch libtool-$LIBTOOL_VERSION-done
+    fi
+}
+
+uninstall_libtool() {
+    if [ ! -z "$installed_libtool_version" ] ; then
+        echo "Uninstalling GNU libtool:"
+        cd libtool-$installed_libtool_version
+        $DO_MV /usr/local/bin/glibtool /usr/local/bin/libtool
+        $DO_MV /usr/local/bin/glibtoolize /usr/local/bin/libtoolize
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm libtool-$installed_libtool_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf libtool-$installed_libtool_version
+            rm -rf libtool-$installed_libtool_version.tar.xz
+        fi
+
+        installed_libtool_version=""
+    fi
+}
+
+install_cmake() {
+    if [ -n "$CMAKE" -a ! -f cmake-$CMAKE_VERSION-done ]; then
+        echo "Downloading and installing CMake:"
+        CMAKE_MAJOR_VERSION="`expr $CMAKE_VERSION : '\([0-9][0-9]*\).*'`"
+        CMAKE_MINOR_VERSION="`expr $CMAKE_VERSION : '[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+        CMAKE_DOTDOT_VERSION="`expr $CMAKE_VERSION : '[0-9][0-9]*\.[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+        CMAKE_MAJOR_MINOR_VERSION=$CMAKE_MAJOR_VERSION.$CMAKE_MINOR_VERSION
+
+        #
+        # NOTE: the "64" in "Darwin64" doesn't mean "64-bit-only"; the
+        # package in question supports both 32-bit and 64-bit x86.
+        #
+        case "$CMAKE_MAJOR_VERSION" in
+
+        0|1)
+            echo "CMake $CMAKE_VERSION" is too old 1>&2
+            ;;
+
+        2)
+            #
+            # Download the DMG, run the installer.
+            #
+            [ -f cmake-$CMAKE_VERSION-Darwin64-universal.dmg ] || curl -L -O https://cmake.org/files/v$CMAKE_MAJOR_MINOR_VERSION/cmake-$CMAKE_VERSION-Darwin64-universal.dmg || exit 1
+            $no_build && echo "Skipping installation" && return
+            sudo hdiutil attach cmake-$CMAKE_VERSION-Darwin64-universal.dmg || exit 1
+            sudo installer -target / -pkg /Volumes/cmake-$CMAKE_VERSION-Darwin64-universal/cmake-$CMAKE_VERSION-Darwin64-universal.pkg || exit 1
+            sudo hdiutil detach /Volumes/cmake-$CMAKE_VERSION-Darwin64-universal
+            ;;
+
+        3)
+            #
+            # Download the DMG and do a drag install, where "drag" means
+            # "mv".
+            #
+            # 3.0.* and 3.1.0 have a Darwin64-universal DMG.
+            # 3.1.1 and later have a Darwin-x86_64 DMG.
+            # Probably not many people are still developing on 32-bit
+            # Macs, so we don't worry about them.
+            #
+            if [ "$CMAKE_MINOR_VERSION" = 0 -o \
+                 "$CMAKE_VERSION" = 3.1.0 ]; then
+                type="Darwin64-universal"
+            else
+                type="Darwin-x86_64"
+            fi
+            [ -f cmake-$CMAKE_VERSION-$type.dmg ] || curl -L -O https://cmake.org/files/v$CMAKE_MAJOR_MINOR_VERSION/cmake-$CMAKE_VERSION-$type.dmg || exit 1
+            $no_build && echo "Skipping installation" && return
+            sudo hdiutil attach cmake-$CMAKE_VERSION-$type.dmg || exit 1
+            sudo ditto /Volumes/cmake-$CMAKE_VERSION-$type/CMake.app /Applications/CMake.app || exit 1
+
+            #
+            # Plant the appropriate symbolic links in /usr/local/bin.
+            # It's a drag-install, so there's no installer to make them,
+            # and the CMake code to put them in place is lame, as
+            #
+            #    1) it defaults to /usr/bin, not /usr/local/bin;
+            #    2) it doesn't request the necessary root privileges;
+            #    3) it can't be run from the command line;
+            #
+            # so we do it ourselves.
+            #
+            for i in ccmake cmake cmake-gui cmakexbuild cpack ctest
+            do
+                sudo ln -s /Applications/CMake.app/Contents/bin/$i /usr/local/bin/$i
+            done
+            sudo hdiutil detach /Volumes/cmake-$CMAKE_VERSION-$type
+            ;;
+
+        *)
+            ;;
+        esac
+        touch cmake-$CMAKE_VERSION-done
+    fi
+}
+
+uninstall_cmake() {
+    if [ ! -z "$installed_cmake_version" ]; then
+        echo "Uninstalling CMake:"
+        installed_cmake_major_version="`expr $installed_cmake_version : '\([0-9][0-9]*\).*'`"
+        case "$installed_cmake_major_version" in
+
+        0|1)
+            echo "CMake $installed_cmake_version" is too old 1>&2
+            ;;
+
+        2)
+            sudo rm -rf "/Applications/CMake "`echo "$installed_cmake_version" | sed 's/\([0-9][0-9]*\)\.\([0-9][0-9]*\)\.\([0-9][0-9]*\).*/\1.\2-\3/'`.app
+            for i in ccmake cmake cmake-gui cmakexbuild cpack ctest
+            do
+                sudo rm -f /usr/bin/$i /usr/local/bin/$i
+            done
+            sudo pkgutil --forget com.Kitware.CMake
+            rm cmake-$installed_cmake_version-done
+            ;;
+
+        3)
+            sudo rm -rf /Applications/CMake.app
+            for i in ccmake cmake cmake-gui cmakexbuild cpack ctest
+            do
+                sudo rm -f /usr/local/bin/$i
+            done
+            rm cmake-$installed_cmake_version-done
+            ;;
+        esac
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version,
+            # whatever it might happen to be called.
+            #
+            rm -f cmake-$installed_cmake_version-Darwin64-universal.dmg
+            rm -f cmake-$installed_cmake_version-Darwin-x86_64.dmg
+        fi
+
+        installed_cmake_version=""
+    fi
+}
+
+install_gettext() {
+    if [ ! -f gettext-$GETTEXT_VERSION-done ] ; then
+        echo "Downloading, building, and installing GNU gettext:"
+        [ -f gettext-$GETTEXT_VERSION.tar.gz ] || curl -L -O http://ftp.gnu.org/pub/gnu/gettext/gettext-$GETTEXT_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat gettext-$GETTEXT_VERSION.tar.gz | tar xf - || exit 1
+        cd gettext-$GETTEXT_VERSION
+        CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=0 $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+       touch gettext-$GETTEXT_VERSION-done
+    fi
+}
+
+uninstall_gettext() {
+    if [ ! -z "$installed_gettext_version" ] ; then
+        #
+        # GLib depends on this, so uninstall it.
+        #
+        uninstall_glib "$@"
+
+        echo "Uninstalling GNU gettext:"
+        cd gettext-$installed_gettext_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm gettext-$installed_gettext_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf gettext-$installed_gettext_version
+            rm -rf gettext-$installed_gettext_version.tar.gz
+        fi
+
+        installed_gettext_version=""
+    fi
+}
+
+install_pkg_config() {
+    if [ ! -f pkg-config-$PKG_CONFIG_VERSION-done ] ; then
+        echo "Downloading, building, and installing pkg-config:"
+        [ -f pkg-config-$PKG_CONFIG_VERSION.tar.gz ] || curl -L -O https://pkgconfig.freedesktop.org/releases/pkg-config-$PKG_CONFIG_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat pkg-config-$PKG_CONFIG_VERSION.tar.gz | tar xf - || exit 1
+        cd pkg-config-$PKG_CONFIG_VERSION
+        ./configure --with-internal-glib || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch pkg-config-$PKG_CONFIG_VERSION-done
+    fi
+}
+
+uninstall_pkg_config() {
+    if [ ! -z "$installed_pkg_config_version" ] ; then
+        echo "Uninstalling pkg-config:"
+        cd pkg-config-$installed_pkg_config_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm pkg-config-$installed_pkg_config_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf pkg-config-$installed_pkg_config_version
+            rm -rf pkg-config-$installed_pkg_config_version.tar.gz
+        fi
+
+        installed_pkg_config_version=""
+    fi
+}
+
+install_glib() {
+    if [ ! -f glib-$GLIB_VERSION-done ] ; then
+        echo "Downloading, building, and installing GLib:"
+        glib_dir=`expr $GLIB_VERSION : '\([0-9][0-9]*\.[0-9][0-9]*\).*'`
+        GLIB_MAJOR_VERSION="`expr $GLIB_VERSION : '\([0-9][0-9]*\).*'`"
+        GLIB_MINOR_VERSION="`expr $GLIB_VERSION : '[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+        GLIB_DOTDOT_VERSION="`expr $GLIB_VERSION : '[0-9][0-9]*\.[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+        if [[ $GLIB_MAJOR_VERSION -gt 2 ||
+             ($GLIB_MAJOR_VERSION -eq 2 && $GLIB_MINOR_VERSION -gt 28) ||
+             ($GLIB_MAJOR_VERSION -eq 2 && $GLIB_MINOR_VERSION -eq 28 && $GLIB_DOTDOT_VERSION -ge 8) ]]
+        then
+            #
+            # Starting with GLib 2.28.8, xz-compressed tarballs are available.
+            #
+            [ -f glib-$GLIB_VERSION.tar.xz ] || curl -L -O http://ftp.gnome.org/pub/gnome/sources/glib/$glib_dir/glib-$GLIB_VERSION.tar.xz || exit 1
+            $no_build && echo "Skipping installation" && return
+            xzcat glib-$GLIB_VERSION.tar.xz | tar xf - || exit 1
+        else
+            [ -f glib-$GLIB_VERSION.tar.bz2 ] || curl -L -O http://ftp.gnome.org/pub/gnome/sources/glib/$glib_dir/glib-$GLIB_VERSION.tar.bz2 || exit 1
+            $no_build && echo "Skipping installation" && return
+            bzcat glib-$GLIB_VERSION.tar.bz2 | tar xf - || exit 1
+        fi
+        cd glib-$GLIB_VERSION
+        #
+        # macOS ships with libffi, but doesn't provide its pkg-config file;
+        # explicitly specify LIBFFI_CFLAGS and LIBFFI_LIBS, so the configure
+        # script doesn't try to use pkg-config to get the appropriate
+        # C flags and loader flags.
+        #
+        # And, what's worse, at least with the version of Xcode that comes
+        # with Leopard, /usr/include/ffi/fficonfig.h doesn't define MACOSX,
+        # which causes the build of GLib to fail.  If we don't find
+        # "#define.*MACOSX" in /usr/include/ffi/fficonfig.h, explicitly
+        # define it.
+        #
+        # While we're at it, suppress -Wformat-nonliteral to avoid a case
+        # where clang's stricter rules on when not to complain about
+        # non-literal format arguments cause it to complain about code
+        # that's safe but it wasn't told that.  See my comment #25 in
+        # GNOME bug 691608:
+        #
+        #    https://bugzilla.gnome.org/show_bug.cgi?id=691608#c25
+        #
+        # First, determine where the system include files are.  (It's not
+        # necessarily /usr/include.)  There's a bit of a greasy hack here;
+        # pre-5.x versions of the developer tools don't support the
+        # --show-sdk-path option, and will produce no output, so includedir
+        # will be set to /usr/include (in those older versions of the
+        # developer tools, there is a /usr/include directory).
+        #
+        includedir=`xcrun --show-sdk-path 2>/dev/null`/usr/include
+        if grep -qs '#define.*MACOSX' $includedir/ffi/fficonfig.h
+        then
+            # It's defined, nothing to do
+            LIBFFI_CFLAGS="-I $includedir/ffi" LIBFFI_LIBS="-lffi" CFLAGS="$CFLAGS -Wno-format-nonliteral $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS -Wno-format-nonliteral $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure || exit 1
+        else
+            LIBFFI_CFLAGS="-I $includedir/ffi" LIBFFI_LIBS="-lffi" CFLAGS="$CFLAGS -DMACOSX -Wno-format-nonliteral $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS -DMACOSX -Wno-format-nonliteral $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure || exit 1
+        fi
+
+        #
+        # Apply the fix to GNOME bug 529806:
+        #
+        #    https://bugzilla.gnome.org/show_bug.cgi?id=529806
+        #
+        # if we have a version of GLib prior to 2.30.
+        #
+        if [[ $GLIB_MAJOR_VERSION -eq 2 && $GLIB_MINOR_VERSION -le 30 ]]
+        then
+            patch -p0 <../../macosx-support-lib-patches/glib-gconvert.c.patch || exit 1
+        fi
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch glib-$GLIB_VERSION-done
+    fi
+}
+
+uninstall_glib() {
+    if [ ! -z "$installed_glib_version" ] ; then
+        #
+        # ATK, Pango, and GTK depend on this, so uninstall them.
+        #
+        uninstall_gtk
+        uninstall_pango
+        uninstall_atk
+
+        echo "Uninstalling GLib:"
+        cd glib-$installed_glib_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm glib-$installed_glib_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf glib-$installed_glib_version
+            rm -rf glib-$installed_glib_version.tar.xz glib-$installed_glib_version.tar.bz2
+        fi
+
+        installed_glib_version=""
+    fi
+}
+
+install_qt() {
+    if [ "$QT_VERSION" -a ! -f qt-$QT_VERSION-done ]; then
+        echo "Downloading, building, and installing Qt:"
+        #
+        # What you get for this URL might just be a 302 Found reply, so use
+        # -L so we get redirected.
+        #
+        if [ "$QT_MAJOR_VERSION" -ge 5 ]
+        then
+            QT_VOLUME=qt-opensource-mac-x64-clang-$QT_VERSION
+        else
+            QT_VOLUME=qt-opensource-mac-$QT_VERSION
+        fi
+        [ -f $QT_VOLUME.dmg ] || curl -L -O http://download.qt.io/archive/qt/$QT_MAJOR_MINOR_VERSION/$QT_MAJOR_MINOR_DOTDOT_VERSION/$QT_VOLUME.dmg || exit 1
+        $no_build && echo "Skipping installation" && return
+        sudo hdiutil attach $QT_VOLUME.dmg || exit 1
+
+        if [ "$QT_MAJOR_VERSION" -ge 5 ]
+        then
+            #
+            # Run the installer executable directly, so that we wait for
+            # it to finish.  Then unmount the volume.
+            #
+            /Volumes/$QT_VOLUME/$QT_VOLUME.app/Contents/MacOS/$QT_VOLUME
+            sudo hdiutil detach /Volumes/$QT_VOLUME
+        else
+            #
+            # Open the installer package; use -W, so that we wait for
+            # the installer to finish.  Then unmount the volume.
+            #
+            open -W "/Volumes/Qt $QT_MAJOR_MINOR_DOTDOT_VERSION/Qt.mpkg"
+            sudo hdiutil detach "/Volumes/Qt $QT_MAJOR_MINOR_DOTDOT_VERSION"
+        fi
+
+        #
+        # Versions 5.3.x through 5.5.0, at least, have bogus .pc files.
+        # See bugs QTBUG-35256 and QTBUG-47162.
+        #
+        # Fix the files.
+        #
+        for i in $HOME/Qt$QT_VERSION/$QT_MAJOR_MINOR_VERSION/clang_64/lib/pkgconfig/*.pc
+        do
+            ed - $i <<EOF
+H
+g/Cflags: /s;;Cflags: -F\${libdir} ;
+g/Cflags: /s;-I\${includedir}/Qt\([a-zA-Z0-9_]*\);-I\${libdir}/Qt\1.framework/Versions/5/Headers;
+g/Libs: /s;';;g
+w
+q
+EOF
+        done
+        touch qt-$QT_VERSION-done
+    fi
+}
+
+uninstall_qt() {
+    if [ ! -z "$installed_qt_version" ] ; then
+        echo "Uninstalling Qt:"
+        rm -rf $HOME/Qt$installed_qt_version
+        rm qt-$installed_qt_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded version.
+            #
+            rm -rf qt-opensource-mac-x64-clang-$installed_qt_version.dmg
+        fi
+
+        installed_qt_version=""
+    fi
+}
+
+install_libpng() {
+    if [ ! -f libpng-$PNG_VERSION-done ] ; then
+        echo "Downloading, building, and installing libpng:"
+        #
+        # The FTP site puts libpng x.y.* into a libpngxy directory.
+        #
+        subdir=`echo $PNG_VERSION | sed 's/\([1-9][0-9]*\)\.\([1-9][0-9]*\).*/libpng\1\2'/`
+        [ -f libpng-$PNG_VERSION.tar.xz ] || curl -L -O ftp://ftp.simplesystems.org/pub/libpng/png/src/$subdir/libpng-$PNG_VERSION.tar.xz
+        $no_build && echo "Skipping installation" && return
+        xzcat libpng-$PNG_VERSION.tar.xz | tar xf - || exit 1
+        cd libpng-$PNG_VERSION
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch libpng-$PNG_VERSION-done
+    fi
+}
+
+uninstall_libpng() {
+    if [ ! -z "$installed_libpng_version" ] ; then
+        #
+        # Cairo depends on this, so uninstall it.
+        #
+        uninstall_cairo "$@"
+
+        echo "Uninstalling libpng:"
+        cd libpng-$installed_libpng_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm libpng-$installed_libpng_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf libpng-$installed_libpng_version
+            rm -rf libpng-$installed_libpng_version.tar.xz
+        fi
+
+        installed_libpng_version=""
+    fi
+}
+
+install_pixman() {
+    if [ ! -f pixman-$PIXMAN_VERSION-done ] ; then
+        echo "Downloading, building, and installing pixman:"
+        [ -f pixman-$PIXMAN_VERSION.tar.gz ] || curl -L -O http://www.cairographics.org/releases/pixman-$PIXMAN_VERSION.tar.gz
+        $no_build && echo "Skipping installation" && return
+        gzcat pixman-$PIXMAN_VERSION.tar.gz | tar xf - || exit 1
+        cd pixman-$PIXMAN_VERSION
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch pixman-$PIXMAN_VERSION-done
+    fi
+}
+
+uninstall_pixman() {
+    if [ ! -z "$installed_pixman_version" ] ; then
+        #
+        # Cairo depends on this, so uninstall it.
+        #
+        uninstall_cairo "$@"
+
+        echo "Uninstalling pixman:"
+        cd pixman-$installed_pixman_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm pixman-$installed_pixman_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf pixman-$installed_pixman_version
+            rm -rf pixman-$installed_pixman_version.tar.gz
+        fi
+
+        installed_pixman_version=""
+    fi
+}
+
+install_cairo() {
+    if [ ! -f cairo-$CAIRO_VERSION-done ] ; then
+        echo "Downloading, building, and installing Cairo:"
+        CAIRO_MAJOR_VERSION="`expr $CAIRO_VERSION : '\([0-9][0-9]*\).*'`"
+        CAIRO_MINOR_VERSION="`expr $CAIRO_VERSION : '[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+        CAIRO_DOTDOT_VERSION="`expr $CAIRO_VERSION : '[0-9][0-9]*\.[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+        if [[ $CAIRO_MAJOR_VERSION -gt 1 ||
+             ($CAIRO_MAJOR_VERSION -eq 2 && $CAIRO_MINOR_VERSION -gt 12) ||
+             ($CAIRO_MAJOR_VERSION -eq 2 && $CAIRO_MINOR_VERSION -eq 12 && $CAIRO_DOTDOT_VERSION -ge 2) ]]
+        then
+            #
+            # Starting with Cairo 1.12.2, the tarballs are compressed with
+            # xz rather than gzip.
+            #
+            [ -f cairo-$CAIRO_VERSION.tar.xz ] || curl -L -O http://cairographics.org/releases/cairo-$CAIRO_VERSION.tar.xz || exit 1
+            $no_build && echo "Skipping installation" && return
+            xzcat cairo-$CAIRO_VERSION.tar.xz | tar xf - || exit 1
+        else
+            [ -f cairo-$CAIRO_VERSION.tar.gz ] || curl -L -O http://cairographics.org/releases/cairo-$CAIRO_VERSION.tar.gz || exit 1
+            $no_build && echo "Skipping installation" && return
+            gzcat cairo-$CAIRO_VERSION.tar.gz | tar xf - || exit 1
+        fi
+        cd cairo-$CAIRO_VERSION
+        # CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure --enable-quartz=no || exit 1
+        # Maybe follow http://cairographics.org/end_to_end_build_for_mac_os_x/
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure --enable-quartz=yes || exit 1
+        #
+        # We must avoid the version of libpng that comes with X11; the
+        # only way I've found to force that is to forcibly set INCLUDES
+        # when we do the build, so that this comes before CAIRO_CFLAGS,
+        # which has -I/usr/X11/include added to it before anything
+        # connected to libpng is.
+        #
+        INCLUDES="-I/usr/local/include/libpng15" make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch cairo-$CAIRO_VERSION-done
+    fi
+}
+
+uninstall_cairo() {
+    if [ ! -z "$installed_cairo_version" ] ; then
+        #
+        # GTK+ depends on this, so uninstall it.
+        #
+        uninstall_gtk "$@"
+
+        echo "Uninstalling Cairo:"
+        cd cairo-$installed_cairo_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm cairo-$installed_cairo_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf cairo-$installed_cairo_version
+            rm -rf cairo-$installed_cairo_version.tar.xz cairo-$installed_cairo_version.tar.gz
+        fi
+
+        installed_cairo_version=""
+    fi
+}
+
+install_atk() {
+    if [ ! -f atk-$ATK_VERSION-done ] ; then
+        echo "Downloading, building, and installing ATK:"
+        atk_dir=`expr $ATK_VERSION : '\([0-9][0-9]*\.[0-9][0-9]*\).*'`
+        ATK_MAJOR_VERSION="`expr $ATK_VERSION : '\([0-9][0-9]*\).*'`"
+        ATK_MINOR_VERSION="`expr $ATK_VERSION : '[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+        ATK_DOTDOT_VERSION="`expr $ATK_VERSION : '[0-9][0-9]*\.[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+        if [[ $ATK_MAJOR_VERSION -gt 2 ||
+             ($ATK_MAJOR_VERSION -eq 2 && $ATK_MINOR_VERSION -gt 0) ||
+             ($ATK_MAJOR_VERSION -eq 2 && $ATK_MINOR_VERSION -eq 0 && $ATK_DOTDOT_VERSION -ge 1) ]]
+        then
+            #
+            # Starting with ATK 2.0.1, xz-compressed tarballs are available.
+            #
+            [ -f atk-$ATK_VERSION.tar.xz ] || curl -L -O http://ftp.gnome.org/pub/gnome/sources/atk/$atk_dir/atk-$ATK_VERSION.tar.xz || exit 1
+            $no_build && echo "Skipping installation" && return
+            xzcat atk-$ATK_VERSION.tar.xz | tar xf - || exit 1
+        else
+            [ -f atk-$ATK_VERSION.tar.bz2 ] || curl -L -O http://ftp.gnome.org/pub/gnome/sources/atk/$atk_dir/atk-$ATK_VERSION.tar.bz2 || exit 1
+            $no_build && echo "Skipping installation" && return
+            bzcat atk-$ATK_VERSION.tar.bz2 | tar xf - || exit 1
+        fi
+        cd atk-$ATK_VERSION
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch atk-$ATK_VERSION-done
+    fi
+}
+
+uninstall_atk() {
+    if [ ! -z "$installed_atk_version" ] ; then
+        #
+        # GTK+ depends on this, so uninstall it.
+        #
+        uninstall_gtk "$@"
+
+        echo "Uninstalling ATK:"
+        cd atk-$installed_atk_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm atk-$installed_atk_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf atk-$installed_atk_version
+            rm -rf atk-$installed_atk_version.tar.xz atk-$installed_atk_version.tar.bz2
+        fi
+
+        installed_atk_version=""
+    fi
+}
+
+install_pango() {
+    if [ ! -f pango-$PANGO_VERSION-done ] ; then
+        echo "Downloading, building, and installing Pango:"
+        pango_dir=`expr $PANGO_VERSION : '\([0-9][0-9]*\.[0-9][0-9]*\).*'`
+        PANGO_MAJOR_VERSION="`expr $PANGO_VERSION : '\([0-9][0-9]*\).*'`"
+        PANGO_MINOR_VERSION="`expr $PANGO_VERSION : '[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+        if [[ $PANGO_MAJOR_VERSION -gt 1 ||
+              $PANGO_MINOR_VERSION -ge 29 ]]
+        then
+            #
+            # Starting with Pango 1.29, the tarballs are compressed with
+            # xz rather than bzip2.
+            #
+            [ -f pango-$PANGO_VERSION.tar.xz ] || curl -L -O http://ftp.gnome.org/pub/gnome/sources/pango/$pango_dir/pango-$PANGO_VERSION.tar.xz || exit 1
+            $no_build && echo "Skipping installation" && return
+            xzcat pango-$PANGO_VERSION.tar.xz | tar xf - || exit 1
+        else
+            [ -f pango-$PANGO_VERSION.tar.bz2 ] || curl -L -O http://ftp.gnome.org/pub/gnome/sources/pango/$pango_dir/pango-$PANGO_VERSION.tar.bz2 || exit 1
+            $no_build && echo "Skipping installation" && return
+            bzcat pango-$PANGO_VERSION.tar.bz2 | tar xf - || exit 1
+        fi
+        cd pango-$PANGO_VERSION
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch pango-$PANGO_VERSION-done
+    fi
+}
+
+uninstall_pango() {
+    if [ ! -z "$installed_pango_version" ] ; then
+        #
+        # GTK+ depends on this, so uninstall it.
+        #
+        uninstall_gtk "$@"
+
+        echo "Uninstalling Pango:"
+        cd pango-$installed_pango_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm pango-$installed_pango_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf pango-$installed_pango_version
+            rm -rf pango-$installed_pango_version.tar.xz pango-$installed_pango_version.tar.bz2
+        fi
+
+        installed_pango_version=""
+    fi
+}
+
+install_gdk_pixbuf() {
+    if [ "$GDK_PIXBUF_VERSION" -a ! -f gdk-pixbuf-$GDK_PIXBUF_VERSION-done ] ; then
+        echo "Downloading, building, and installing gdk-pixbuf:"
+        gdk_pixbuf_dir=`expr $GDK_PIXBUF_VERSION : '\([0-9][0-9]*\.[0-9][0-9]*\).*'`
+        [ -f gdk-pixbuf-$GDK_PIXBUF_VERSION.tar.xz ] || curl -L -O http://ftp.gnome.org/pub/gnome/sources/gdk-pixbuf/$gdk_pixbuf_dir/gdk-pixbuf-$GDK_PIXBUF_VERSION.tar.xz || exit 1
+        $no_build && echo "Skipping installation" && return
+        xzcat gdk-pixbuf-$GDK_PIXBUF_VERSION.tar.xz | tar xf - || exit 1
+        cd gdk-pixbuf-$GDK_PIXBUF_VERSION
+        #
+        # If we're building using the 10.6 SDK, force the use of libpng12.
+        #
+        # The OS's X11, and corresponding SDK, didn't introduce libpng15,
+        # or pkg-config files, until 10.7, so, for 10.6 have to explicitly
+        # set LIBPNG to override the configure script, and also force the
+        # CFLAGS to look for the header files for libpng12 (note that
+        # -isysroot doesn't affect the arguments to -I, so we need to
+        # include the SDK path explicitly).
+        #
+        if [[ "$sdk_target" = 10.6 ]]
+        then
+            LIBPNG="-L/usr/X11/lib -lpng12" CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS -I$SDKPATH/usr/X11/include/libpng12" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS -I$SDKPATH/usr/X11/include/libpng12" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure --without-libtiff --without-libjpeg || exit 1
+        else
+            CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure --without-libtiff --without-libjpeg || exit 1
+        fi
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch gdk-pixbuf-$GDK_PIXBUF_VERSION-done
+    fi
+}
+
+uninstall_gdk_pixbuf() {
+    if [ ! -z "$installed_gdk_pixbuf_version" ] ; then
+        #
+        # GTK+ depends on this, so uninstall it.
+        #
+        uninstall_gtk "$@"
+
+        echo "Uninstalling gdk-pixbuf:"
+        cd gdk-pixbuf-$installed_gdk_pixbuf_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm gdk-pixbuf-$installed_gdk_pixbuf_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf gdk-pixbuf-$installed_gdk_pixbuf_version
+            rm -rf gdk-pixbuf-$installed_gdk_pixbuf_version.tar.xz
+        fi
+
+        installed_gdk_pixbuf_version=""
+    fi
+}
+
+install_gtk() {
+    if [ ! -f gtk+-$GTK_VERSION-done ] ; then
+        echo "Downloading, building, and installing GTK+:"
+        gtk_dir=`expr $GTK_VERSION : '\([0-9][0-9]*\.[0-9][0-9]*\).*'`
+        if [[ $GTK_MAJOR_VERSION -gt 2 ||
+             ($GTK_MAJOR_VERSION -eq 2 && $GTK_MINOR_VERSION -gt 24) ||
+             ($GTK_MAJOR_VERSION -eq 2 && $GTK_MINOR_VERSION -eq 24 && $GTK_DOTDOT_VERSION -ge 5) ]]
+        then
+            #
+            # Starting with GTK+ 2.24.5, the tarballs are compressed with
+            # xz rather than gzip, in addition to bzip2; use xz, as we've
+            # built and installed it, and as xz compresses better than
+            # bzip2 so the tarballs take less time to download.
+            #
+            [ -f gtk+-$GTK_VERSION.tar.xz ] || curl -L -O http://ftp.gnome.org/pub/gnome/sources/gtk+/$gtk_dir/gtk+-$GTK_VERSION.tar.xz || exit 1
+            $no_build && echo "Skipping installation" && return
+            xzcat gtk+-$GTK_VERSION.tar.xz | tar xf - || exit 1
+        else
+            [ -f gtk+-$GTK_VERSION.tar.bz2 ] || curl -L -O http://ftp.gnome.org/pub/gnome/sources/gtk+/$gtk_dir/gtk+-$GTK_VERSION.tar.bz2 || exit 1
+            $no_build && echo "Skipping installation" && return
+            bzcat gtk+-$GTK_VERSION.tar.bz2 | tar xf - || exit 1
+        fi
+        cd gtk+-$GTK_VERSION
+        if [ $DARWIN_MAJOR_VERSION -ge "12" ]
+        then
+            #
+            # GTK+ 2.24.10, at least, doesn't build on Mountain Lion with the
+            # CUPS printing backend - either the CUPS API changed incompatibly
+            # or the backend was depending on non-API implementation details.
+            #
+            # Configure it out, on Mountain Lion and later, for now.
+            # (12 is the Darwin major version number in Mountain Lion.)
+            #
+            # Also, configure out libtiff and libjpeg; configure scripts
+            # just ignore unknown --enable/--disable and --with/--without
+            # options (at least they've always do so up to now).
+            #
+            CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure --disable-cups --without-libtiff --without-libjpeg || exit 1
+        else
+            CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure --without-libtiff --without-libjpeg || exit 1
+        fi
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch gtk+-$GTK_VERSION-done
+    fi
+}
+
+uninstall_gtk() {
+    if [ ! -z "$installed_gtk_version" ] ; then
+        echo "Uninstalling GTK+:"
+        cd gtk+-$installed_gtk_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm gtk+-$installed_gtk_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf gtk+-$installed_gtk_version
+            rm -rf gtk+-$installed_gtk_version.tar.xz gtk+-$installed_gtk_version.tar.bz2
+        fi
+
+        installed_gtk_version=""
+    fi
+}
+
+install_libsmi() {
+    if [ "$LIBSMI_VERSION" -a ! -f libsmi-$LIBSMI_VERSION-done ] ; then
+        echo "Downloading, building, and installing libsmi:"
+        [ -f libsmi-$LIBSMI_VERSION.tar.gz ] || curl -L -O https://www.ibr.cs.tu-bs.de/projects/libsmi/download/libsmi-$LIBSMI_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat libsmi-$LIBSMI_VERSION.tar.gz | tar xf - || exit 1
+        cd libsmi-$LIBSMI_VERSION
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch libsmi-$LIBSMI_VERSION-done
+    fi
+}
+
+uninstall_libsmi() {
+    if [ ! -z "$installed_libsmi_version" ] ; then
+        echo "Uninstalling libsmi:"
+        cd libsmi-$installed_libsmi_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm libsmi-$installed_libsmi_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf libsmi-$installed_libsmi_version
+            rm -rf libsmi-$installed_libsmi_version.tar.gz
+        fi
+
+        installed_libsmi_version=""
+    fi
+}
+
+install_libgpg_error() {
+    if [ "$LIBGPG_ERROR_VERSION" -a ! -f libgpg-error-$LIBGPG_ERROR_VERSION-done ] ; then
+        echo "Downloading, building, and installing libgpg-error:"
+        [ -f libgpg-error-$LIBGPG_ERROR_VERSION.tar.bz2 ] || curl -L -O ftp://ftp.gnupg.org/gcrypt/libgpg-error/libgpg-error-$LIBGPG_ERROR_VERSION.tar.bz2 || exit 1
+        $no_build && echo "Skipping installation" && return
+        bzcat libgpg-error-$LIBGPG_ERROR_VERSION.tar.bz2 | tar xf - || exit 1
+        cd libgpg-error-$LIBGPG_ERROR_VERSION
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch libgpg-error-$LIBGPG_ERROR_VERSION-done
+    fi
+}
+
+uninstall_libgpg_error() {
+    if [ ! -z "$installed_libgpg_error_version" ] ; then
+        #
+        # libgcrypt depends on this, so uninstall it.
+        #
+        uninstall_libgcrypt "$@"
+
+        echo "Uninstalling libgpg-error:"
+        cd libgpg-error-$installed_libgpg_error_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm libgpg-error-$installed_libgpg_error_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf libgpg-error-$installed_libgpg_error_version
+            rm -rf libgpg-error-$installed_libgpg_error_version.tar.bz2
+        fi
+
+        installed_libgpg_error_version=""
+    fi
+}
+
+install_libgcrypt() {
+    if [ "$LIBGCRYPT_VERSION" -a ! -f libgcrypt-$LIBGCRYPT_VERSION-done ] ; then
+        #
+        # libgpg-error is required for libgcrypt.
+        #
+        if [ -z $LIBGPG_ERROR_VERSION ]
+        then
+            echo "libgcrypt requires libgpg-error, but you didn't install libgpg-error." 1>&2
+            exit 1
+        fi
+
+        echo "Downloading, building, and installing libgcrypt:"
+        [ -f libgcrypt-$LIBGCRYPT_VERSION.tar.gz ] || curl -L -O ftp://ftp.gnupg.org/gcrypt/libgcrypt/libgcrypt-$LIBGCRYPT_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat libgcrypt-$LIBGCRYPT_VERSION.tar.gz | tar xf - || exit 1
+        cd libgcrypt-$LIBGCRYPT_VERSION
+        #
+        # The assembler language code is not compatible with the macOS
+        # x86 assembler (or is it an x86-64 vs. x86-32 issue?).
+        #
+        # libgcrypt expects gnu89, not c99/gnu99, semantics for
+        # "inline".  See, for example:
+        #
+        #    http://lists.freebsd.org/pipermail/freebsd-ports-bugs/2010-October/198809.html
+        #
+        CFLAGS="$CFLAGS -std=gnu89 $VERSION_MIN_FLAGS $SDKFLAGS" CFLAGS="$CFLAGS -std=gnu89 $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure --disable-asm || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch libgcrypt-$LIBGCRYPT_VERSION-done
+    fi
+}
+
+uninstall_libgcrypt() {
+    if [ ! -z "$installed_libgcrypt_version" ] ; then
+        echo "Uninstalling libgcrypt:"
+        cd libgcrypt-$installed_libgcrypt_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm libgcrypt-$installed_libgcrypt_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf libgcrypt-$installed_libgcrypt_version
+            rm -rf libgcrypt-$installed_libgcrypt_version.tar.gz
+        fi
+
+        installed_libgcrypt_version=""
+    fi
+}
+
+install_gmp() {
+    if [ "$GMP_VERSION" -a ! -f gmp-$GMP_VERSION-done ] ; then
+        echo "Downloading, building, and installing GMP:"
+        [ -f gmp-$GMP_VERSION.tar.lz ] || curl -L -O https://gmplib.org/download/gmp/gmp-$GMP_VERSION.tar.lz || exit 1
+        $no_build && echo "Skipping installation" && return
+        lzip -c -d gmp-$GMP_VERSION.tar.lz | tar xf - || exit 1
+        cd gmp-$GMP_VERSION
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure --with-libgcrypt --without-p11-kit || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch gmp-$GMP_VERSION-done
+    fi
+}
+
+uninstall_gmp() {
+    if [ ! -z "$installed_gmp_version" ] ; then
+        #
+        # Nettle depends on this, so uninstall it.
+        #
+        uninstall_nettle "$@"
+
+        echo "Uninstalling GMP:"
+        cd gmp-$installed_gmp_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm gmp-$installed_gmp_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf gmp-$installed_gmp_version
+            rm -rf gmp-$installed_gmp_version.tar.lz
+        fi
+
+        installed_gmp_version=""
+    fi
+}
+
+install_nettle() {
+    if [ "$NETTLE_VERSION" -a ! -f nettle-$NETTLE_VERSION-done ] ; then
+        echo "Downloading, building, and installing Nettle:"
+        [ -f nettle-$NETTLE_VERSION.tar.gz ] || curl -L -O https://ftp.gnu.org/gnu/nettle/nettle-$NETTLE_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat nettle-$NETTLE_VERSION.tar.gz | tar xf - || exit 1
+        cd nettle-$NETTLE_VERSION
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure --with-libgcrypt --without-p11-kit || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch nettle-$NETTLE_VERSION-done
+    fi
+}
+
+uninstall_nettle() {
+    if [ ! -z "$installed_nettle_version" ] ; then
+        #
+        # GnuTLS depends on this, so uninstall it.
+        #
+        uninstall_gnutls "$@"
+
+        echo "Uninstalling Nettle:"
+        cd nettle-$installed_nettle_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm nettle-$installed_nettle_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf nettle-$installed_nettle_version
+            rm -rf nettle-$installed_nettle_version.tar.gz
+        fi
+
+        installed_nettle_version=""
+    fi
+}
+
+install_gnutls() {
+    if [ "$GNUTLS_VERSION" -a ! -f gnutls-$GNUTLS_VERSION-done ] ; then
+        #
+        # GnuTLS requires Nettle.
+        #
+        if [ -z $NETTLE_VERSION ]
+        then
+            echo "GnuTLS requires Nettle, but you didn't install Nettle" 1>&2
+            exit 1
+        fi
+
+        echo "Downloading, building, and installing GnuTLS:"
+        if [[ $GNUTLS_MAJOR_VERSION -ge 3 ]]
+        then
+            #
+            # Starting with GnuTLS 3.x, the tarballs are compressed with
+            # xz rather than bzip2.
+            #
+            [ -f gnutls-$GNUTLS_VERSION.tar.xz ] || curl -L -O https://www.gnupg.org/ftp/gcrypt/gnutls/v$GNUTLS_MAJOR_VERSION.$GNUTLS_MINOR_VERSION/gnutls-$GNUTLS_VERSION.tar.xz || exit 1
+            $no_build && echo "Skipping installation" && return
+            xzcat gnutls-$GNUTLS_VERSION.tar.xz | tar xf - || exit 1
+        else
+            [ -f gnutls-$GNUTLS_VERSION.tar.bz2 ] || curl -L -O https://www.gnupg.org/ftp/gcrypt/gnutls/v$GNUTLS_MAJOR_VERSION.$GNUTLS_MINOR_VERSION/gnutls-$GNUTLS_VERSION.tar.bz2 || exit 1
+            $no_build && echo "Skipping installation" && return
+            bzcat gnutls-$GNUTLS_VERSION.tar.bz2 | tar xf - || exit 1
+        fi
+        cd gnutls-$GNUTLS_VERSION
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure --with-included-libtasn1 --with-included-unistring --without-p11-kit || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch gnutls-$GNUTLS_VERSION-done
+    fi
+}
+
+uninstall_gnutls() {
+    if [ ! -z "$installed_gnutls_version" ] ; then
+        echo "Uninstalling GnuTLS:"
+        cd gnutls-$installed_gnutls_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm gnutls-$installed_gnutls_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf gnutls-$installed_gnutls_version
+            rm -rf gnutls-$installed_gnutls_version.tar.bz2
+        fi
+
+        installed_gnutls_version=""
+    fi
+}
+
+install_lua() {
+    if [ "$LUA_VERSION" -a ! -f lua-$LUA_VERSION-done ] ; then
+        echo "Downloading, building, and installing Lua:"
+        [ -f lua-$LUA_VERSION.tar.gz ] || curl -L -O http://www.lua.org/ftp/lua-$LUA_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat lua-$LUA_VERSION.tar.gz | tar xf - || exit 1
+        cd lua-$LUA_VERSION
+        make MYCFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" MYLDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" $MAKE_BUILD_OPTS macosx || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch lua-$LUA_VERSION-done
+    fi
+}
+
+uninstall_lua() {
+    if [ ! -z "$installed_lua_version" ] ; then
+        echo "Uninstalling Lua:"
+        #
+        # Lua has no "make uninstall", so just remove stuff manually.
+        # There's no configure script, so there's no need for
+        # "make distclean", either; just do "make clean".
+        #
+        (cd /usr/local/bin; $DO_RM -f lua luac)
+        (cd /usr/local/include; $DO_RM -f lua.h luaconf.h lualib.h lauxlib.h lua.hpp)
+        (cd /usr/local/lib; $DO_RM -f liblua.a)
+        (cd /usr/local/man/man1; $DO_RM -f lua.1 luac.1)
+        cd lua-$installed_lua_version
+        make clean || exit 1
+        cd ..
+        rm lua-$installed_lua_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf lua-$installed_lua_version
+            rm -rf lua-$installed_lua_version.tar.gz
+        fi
+
+        installed_lua_version=""
+    fi
+}
+
+install_portaudio() {
+    #
+    # Check for both the old versionless portaudio-done and the new
+    # versioned -done file.
+    #
+    if [ "$PORTAUDIO_VERSION" -a ! -f portaudio-$PORTAUDIO_VERSION-done ] ; then
+        echo "Downloading, building, and installing PortAudio:"
+        [ -f $PORTAUDIO_VERSION.tgz ] || curl -L -O http://www.portaudio.com/archives/$PORTAUDIO_VERSION.tgz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat $PORTAUDIO_VERSION.tgz | tar xf - || exit 1
+        cd portaudio
+        #
+        # Un-comment an include that's required on Lion.
+        #
+        patch -p0 include/pa_mac_core.h <../../macosx-support-lib-patches/portaudio-pa_mac_core.h.patch
+        #
+        # Fix a bug that showed up with clang (but is a bug with any
+        # compiler).
+        #
+        patch -p0 src/hostapi/coreaudio/pa_mac_core.c <../../macosx-support-lib-patches/portaudio-pa_mac_core.c.patch
+        #
+        # Disable fat builds - the configure script doesn't work right
+        # with Xcode 4 if you leave them enabled, and we don't build
+        # any other libraries fat (GLib, for example, would be very
+        # hard to build fat), so there's no advantage to having PortAudio
+        # built fat.
+        #
+        # Set the minimum macOS version to 10.4, to suppress some
+        # deprecation warnings.  (Good luck trying to make any of
+        # this build on an OS+Xcode with a pre-10.4 SDK; we don't
+        # worry about the user requesting that.)
+        #
+        # Explicitly disable deprecation, so the damn thing will build
+        # on El Capitan with Xcode 7.
+        #
+        CFLAGS="$CFLAGS -Wno-deprecated-declarations -mmacosx-version-min=10.4 $SDKFLAGS" CXXFLAGS="$CXXFLAGS -mmacosx-version-min=10.4 $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure --disable-mac-universal || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch portaudio-$PORTAUDIO_VERSION-done
+    fi
+}
+
+uninstall_portaudio() {
+    if [ ! -z "$installed_portaudio_version" ] ; then
+        echo "Uninstalling PortAudio:"
+        cd portaudio
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm portaudio-$installed_portaudio_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf portaudio
+            rm -rf $installed_portaudio_version.tgz
+        fi
+
+        installed_portaudio_version=""
+    fi
+}
+
+install_snappy() {
+    if [ "$SNAPPY_VERSION" -a ! -f snappy-$SNAPPY_VERSION-done ] ; then
+        echo "Downloading, building, and installing snappy:"
+        [ -f snappy-$SNAPPY_VERSION.tar.gz ] || curl -L -O https://github.com/google/snappy/releases/download/$SNAPPY_VERSION/snappy-$SNAPPY_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat snappy-$SNAPPY_VERSION.tar.gz | tar xf - || exit 1
+        cd snappy-$SNAPPY_VERSION
+        CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=0" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch snappy-$SNAPPY_VERSION-done
+    fi
+}
+
+uninstall_snappy() {
+    if [ ! -z "$installed_snappy_version" ] ; then
+        echo "Uninstalling snappy:"
+        cd snappy-$installed_snappy_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm snappy-$installed_snappy_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf snappy-$installed_snappy_version
+            rm -rf snappy-$installed_snappy_version.tar.gz
+        fi
+
+        installed_snappy_version=""
+    fi
+}
+
+install_libxml2() {
+    if [ "$LIBXML2_VERSION" -a ! -f libxml2-$LIBXML2_VERSION-done ] ; then
+        echo "Downloading, building, and installing libxml2:"
+        [ -f libxml2-$LIBXML2_VERSION.tar.gz ] || curl -L -O ftp://xmlsoft.org/libxml2/libxml2-$LIBXML2_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat libxml2-$LIBXML2_VERSION.tar.gz | tar xf - || exit 1
+        cd libxml2-$LIBXML2_VERSION
+        CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=0" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch libxml2-$LIBXML2_VERSION-done
+    fi
+}
+
+uninstall_libxml2() {
+    if [ ! -z "$installed_libxml2_version" ] ; then
+        echo "Uninstalling libxml2:"
+        cd libxml2-$installed_libxml2_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm libxml2-$installed_libxml2_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf libxml2-$installed_libxml2_version
+            rm -rf libxml2-$installed_libxml2_version.tar.gz
+        fi
+
+        installed_libxml2_version=""
+    fi
+}
+
+install_lz4() {
+    if [ "$LZ4_VERSION" -a ! -f lz4-$LZ4_VERSION-done ] ; then
+        echo "Downloading, building, and installing lz4:"
+        [ -f lz4-$LZ4_VERSION.tar.gz ] || curl -L -o lz4-$LZ4_VERSION.tar.gz https://github.com/lz4/lz4/archive/$LZ4_VERSION.tar.gz  || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat lz4-$LZ4_VERSION.tar.gz | tar xf - || exit 1
+        cd lz4-$LZ4_VERSION
+        # CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=0" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch lz4-$LZ4_VERSION-done
+    fi
+}
+
+uninstall_lz4() {
+    if [ ! -z "$installed_lz4_version" ] ; then
+        echo "Uninstalling lz4:"
+        cd lz4-$installed_lz4_version
+        $DO_MAKE_UNINSTALL || exit 1
+        #
+        # lz4 uses cmake and doesn't support "make distclean"
+        #
+        # make distclean || exit 1
+        cd ..
+        rm lz4-$installed_lz4_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf lz4-$installed_lz4_version
+            rm -rf lz4-$installed_lz4_version.tar.gz
+        fi
+
+        installed_lz4_version=""
+    fi
+}
+
+install_sbc() {
+    if [ "$SBC_VERSION" -a ! -f sbc-$SBC_VERSION-done ] ; then
+        echo "Downloading, building, and installing sbc:"
+        [ -f sbc-$SBC_VERSION.tar.gz ] || curl -L -O https://www.kernel.org/pub/linux/bluetooth/sbc-$SBC_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat sbc-$SBC_VERSION.tar.gz | tar xf - || exit 1
+        cd sbc-$SBC_VERSION
+        CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=0" ./configure --disable-tools --disable-tester --disable-shared || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch sbc-$SBC_VERSION-done
+    fi
+}
+
+uninstall_sbc() {
+    if [ ! -z "$installed_sbc_version" ] ; then
+        echo "Uninstalling sbc:"
+        cd sbc-$installed_sbc_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm sbc-$installed_sbc_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf sbc-$installed_sbc_version
+            rm -rf sbc-$installed_sbc_version.tar.gz
+        fi
+
+        installed_sbc_version=""
+    fi
+}
+
+install_geoip() {
+    if [ "$GEOIP_VERSION" -a ! -f geoip-$GEOIP_VERSION-done ] ; then
+        echo "Downloading, building, and installing GeoIP API:"
+        GEOIP_MAJOR_VERSION="`expr $GEOIP_VERSION : '\([0-9][0-9]*\).*'`"
+        GEOIP_MINOR_VERSION="`expr $GEOIP_VERSION : '[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+        GEOIP_DOTDOT_VERSION="`expr $GEOIP_VERSION : '[0-9][0-9]*\.[0-9][0-9]*\.\([0-9][0-9]*\).*'`"
+        if [[ $GEOIP_MAJOR_VERSION -gt 1 ||
+             ($GEOIP_MAJOR_VERSION -eq 1 && $GEOIP_MINOR_VERSION -gt 6) ||
+             ($GEOIP_MAJOR_VERSION -eq 1 && $GEOIP_MINOR_VERSION -eq 6 && $GEOIP_DOTDOT_VERSION -ge 1) ]]
+        then
+            #
+            # Starting with GeoIP 1.6.1, the tarballs are on GitHub.
+            #
+            [ -f GeoIP-$GEOIP_VERSION.tar.gz ] || curl -L -O https://github.com/maxmind/geoip-api-c/releases/download/v$GEOIP_VERSION/GeoIP-$GEOIP_VERSION.tar.gz || exit 1
+        else
+            [ -f GeoIP-$GEOIP_VERSION.tar.gz ] || curl -L -O http://geolite.maxmind.com/download/geoip/api/c/GeoIP-$GEOIP_VERSION.tar.gz || exit 1
+        fi
+        $no_build && echo "Skipping installation" && return
+        gzcat GeoIP-$GEOIP_VERSION.tar.gz | tar xf - || exit 1
+        cd GeoIP-$GEOIP_VERSION
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure || exit 1
+        #
+        # Grr.  Their man pages "helpfully" have an ISO 8859-1
+        # copyright symbol in the copyright notice, but macOS's
+        # default character encoding is UTF-8.  sed on Mountain
+        # Lion barfs at the "illegal character sequence" represented
+        # by an ISO 8859-1 copyright symbol, as it's not a valid
+        # UTF-8 sequence.
+        #
+        # iconv the relevant man pages into UTF-8.
+        #
+        for i in geoipupdate.1.in geoiplookup6.1.in geoiplookup.1.in
+        do
+            iconv -f iso8859-1 -t utf-8 man/"$i" >man/"$i".tmp &&
+                mv man/"$i".tmp man/"$i"
+        done
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch geoip-$GEOIP_VERSION-done
+    fi
+}
+
+uninstall_geoip() {
+    if [ ! -z "$installed_geoip_version" ] ; then
+        echo "Uninstalling GeoIP API:"
+        cd GeoIP-$installed_geoip_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm geoip-$installed_geoip_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf GeoIP-$installed_geoip_version
+            rm -rf GeoIP-$installed_geoip_version.tar.gz
+        fi
+
+        installed_geoip_version=""
+    fi
+}
+
+install_c_ares() {
+    if [ "$CARES_VERSION" -a ! -f c-ares-$CARES_VERSION-done ] ; then
+        echo "Downloading, building, and installing C-Ares API:"
+        [ -f c-ares-$CARES_VERSION.tar.gz ] || curl -L -O https://c-ares.haxx.se/download/c-ares-$CARES_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat c-ares-$CARES_VERSION.tar.gz | tar xf - || exit 1
+        cd c-ares-$CARES_VERSION
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS"  LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch c-ares-$CARES_VERSION-done
+    fi
+}
+
+uninstall_c_ares() {
+    if [ ! -z "$installed_cares_version" ] ; then
+        echo "Uninstalling C-Ares API:"
+        cd c-ares-$installed_cares_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm c-ares-$installed_cares_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf c-ares-$installed_cares_version
+            rm -rf c-ares-$installed_cares_version.tar.gz
+        fi
+
+        installed_cares_version=""
+    fi
+}
+
+install_libssh() {
+    if [ "$LIBSSH_VERSION" -a ! -f libssh-$LIBSSH_VERSION-done ] ; then
+        echo "Downloading, building, and installing libssh:"
+        [ -f libssh-$LIBSSH_VERSION.tar.xz ] || curl -L -O https://red.libssh.org/attachments/download/195/libssh-$LIBSSH_VERSION.tar.xz || exit 1
+        $no_build && echo "Skipping installation" && return
+        xzcat libssh-$LIBSSH_VERSION.tar.xz | tar xf - || exit 1
+        cd libssh-$LIBSSH_VERSION
+        mkdir build
+        cd build
+        CFLAGS="$CFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" CXXFLAGS="$CXXFLAGS $VERSION_MIN_FLAGS $SDKFLAGS"  LDFLAGS="$LDFLAGS $VERSION_MIN_FLAGS $SDKFLAGS" cmake -DWITH_GCRYPT=1 ../ || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ../..
+        touch libssh-$LIBSSH_VERSION-done
+    fi
+}
+
+uninstall_libssh() {
+    if [ ! -z "$installed_libssh_version" ] ; then
+        echo "Sadly, libssh uses cmake, and doesn't support uninstall."
+    fi
+}
+
+install_nghttp2() {
+    if [ "$NGHTTP2_VERSION" -a ! -f nghttp2-$NGHTTP2_VERSION-done ] ; then
+        echo "Downloading, building, and installing nghttp2:"
+        [ -f nghttp2-$NGHTTP2_VERSION.tar.xz ] || curl -L -O https://github.com/nghttp2/nghttp2/releases/download/v$NGHTTP2_VERSION/nghttp2-$NGHTTP2_VERSION.tar.xz || exit 1
+        $no_build && echo "Skipping installation" && return
+        xzcat nghttp2-$NGHTTP2_VERSION.tar.xz | tar xf - || exit 1
+        cd nghttp2-$NGHTTP2_VERSION
+        ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch nghttp2-$NGHTTP2_VERSION-done
+    fi
+}
+
+uninstall_nghttp2() {
+    if [ ! -z "$installed_nghttp2_version" ] ; then
+        echo "Uninstalling nghttp2:"
+        cd nghttp2-$installed_nghttp2_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm nghttp2-$installed_nghttp2_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf nghttp2-$installed_nghttp2_version
+            rm -rf nghttp2-$installed_nghttp2_version.tar.xz
+        fi
+
+        installed_nghttp2_version=""
+    fi
+}
+
+install_libtiff() {
+    if [ "$LIBTIFF_VERSION" -a ! -f tiff-$LIBTIFF_VERSION-done ] ; then
+        echo "Downloading, building, and installing libtiff:"
+        [ -f libtiff-$LIBTIFF_VERSION.tar.gz ] || curl -L -O http://dl.maptools.org/dl/libtiff/tiff-$LIBTIFF_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat tiff-$LIBTIFF_VERSION.tar.gz | tar xf - || exit 1
+        cd tiff-$LIBTIFF_VERSION
+        ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch tiff-$LIBTIFF_VERSION-done
+    fi
+}
+
+uninstall_libtiff() {
+    if [ ! -z "$installed_libtiff_version" ] ; then
+        echo "Uninstalling libtiff:"
+        cd tiff-$installed_libtiff_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm tiff-$installed_libtiff_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf tiff-$installed_libtiff_version
+            rm -rf tiff-$installed_libtiff_version.tar.gz
+        fi
+
+        installed_libtiff_version=""
+    fi
+}
+
+install_spandsp() {
+    if [ "$SPANDSP_VERSION" -a ! -f spandsp-$SPANDSP_VERSION-done ] ; then
+        echo "Downloading, building, and installing SpanDSP:"
+        [ -f spandsp-$SPANDSP_VERSION.tar.gz ] || curl -L -O https://www.soft-switch.org/downloads/spandsp/spandsp-$SPANDSP_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat spandsp-$SPANDSP_VERSION.tar.gz | tar xf - || exit 1
+        cd spandsp-$SPANDSP_VERSION
+        ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch spandsp-$SPANDSP_VERSION-done
+    fi
+}
+
+uninstall_spandsp() {
+    if [ ! -z "$installed_spandsp_version" ] ; then
+        echo "Uninstalling SpanDSP:"
+        cd spandsp-$installed_spandsp_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm spandsp-$installed_spandsp_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf spandsp-$installed_spandsp_version
+            rm -rf spandsp-$installed_spandsp_version.tar.gz
+        fi
+
+        installed_spandsp_version=""
+    fi
+}
+
+install_bcg729() {
+    if [ "$BCG729_VERSION" -a ! -f bcg729-$BCG729_VERSION-done ] ; then
+        echo "Downloading, building, and installing bcg729:"
+        [ -f bcg729-$BCG729_VERSION.tar.gz ] || curl -L -O http://download-mirror.savannah.gnu.org/releases/linphone/plugins/sources/bcg729-$BCG729_VERSION.tar.gz || exit 1
+        $no_build && echo "Skipping installation" && return
+        gzcat bcg729-$BCG729_VERSION.tar.gz | tar xf - || exit 1
+        cd bcg729-$BCG729_VERSION
+        ./configure || exit 1
+        make $MAKE_BUILD_OPTS || exit 1
+        $DO_MAKE_INSTALL || exit 1
+        cd ..
+        touch bcg729-$BCG729_VERSION-done
+    fi
+}
+
+uninstall_bcg729() {
+    if [ ! -z "$installed_bcg729_version" ] ; then
+        echo "Uninstalling bcg729:"
+        cd bcg729-$installed_bcg729_version
+        $DO_MAKE_UNINSTALL || exit 1
+        make distclean || exit 1
+        cd ..
+        rm bcg729-$installed_bcg729_version-done
+
+        if [ "$#" -eq 1 -a "$1" = "-r" ] ; then
+            #
+            # Get rid of the previously downloaded and unpacked version.
+            #
+            rm -rf bcg729-$installed_bcg729_version
+            rm -rf bcg729-$installed_bcg729_version.tar.gz
+        fi
+
+        installed_bcg729_version=""
+    fi
+}
+
+install_all() {
+    #
+    # Check whether the versions we have installed are the versions
+    # requested; if not, uninstall the installed versions.
+    #
+    if [ ! -z "$installed_bcg729_version" -a \
+              "$installed_bcg729_version" != "$BCG729_VERSION" ] ; then
+        echo "Installed SpanDSP version is $installed_bcg729_version"
+        if [ -z "$BCG729_VERSION" ] ; then
+            echo "bcg729 is not requested"
+        else
+            echo "Requested bcg729 version is $BCG729_VERSION"
+        fi
+        uninstall_bcg729 -r
+    fi
+
+    if [ ! -z "$installed_spandsp_version" -a \
+              "$installed_spandsp_version" != "$SPANDSP_VERSION" ] ; then
+        echo "Installed SpanDSP version is $installed_spandsp_version"
+        if [ -z "$SPANDSP_VERSION" ] ; then
+            echo "spandsp is not requested"
+        else
+            echo "Requested SpanDSP version is $SPANDSP_VERSION"
+        fi
+        uninstall_spandsp -r
+    fi
+
+    if [ ! -z "$installed_libtiff_version" -a \
+              "$installed_libtiff_version" != "$LIBTIFF_VERSION" ] ; then
+        echo "Installed libtiff version is $installed_libtiff_version"
+        if [ -z "$LIBTIFF_VERSION" ] ; then
+            echo "libtiff is not requested"
+        else
+            echo "Requested libtiff version is $LIBTIFF_VERSION"
+        fi
+        uninstall_libtiff -r
+    fi
+
+    if [ ! -z "$installed_nghttp2_version" -a \
+              "$installed_nghttp2_version" != "$NGHTTP2_VERSION" ] ; then
+        echo "Installed nghttp2 version is $installed_nghttp2_version"
+        if [ -z "$NGHTTP2_VERSION" ] ; then
+            echo "nghttp2 is not requested"
+        else
+            echo "Requested nghttp2 version is $NGHTTP2_VERSION"
+        fi
+        uninstall_nghttp2 -r
+    fi
+
+    if [ ! -z "$installed_libssh_version" -a \
+              "$installed_libssh_version" != "$LIBSSH_VERSION" ] ; then
+        echo "Installed libssh version is $installed_libssh_version"
+        if [ -z "$LIBSSH_VERSION" ] ; then
+            echo "libssh is not requested"
+        else
+            echo "Requested libssh version is $LIBSSH_VERSION"
+        fi
+        uninstall_libssh -r
+    fi
+
+    if [ ! -z "$installed_cares_version" -a \
+              "$installed_cares_version" != "$CARES_VERSION" ] ; then
+        echo "Installed C-Ares version is $installed_cares_version"
+        if [ -z "$CARES_VERSION" ] ; then
+            echo "C-Ares is not requested"
+        else
+            echo "Requested C-Ares version is $CARES_VERSION"
+        fi
+        uninstall_c_ares -r
+    fi
+
+    if [ ! -z "$installed_geoip_version" -a \
+              "$installed_geoip_version" != "$GEOIP_VERSION" ] ; then
+        echo "Installed GeoIP API version is $installed_geoip_version"
+        if [ -z "$GEOIP_VERSION" ] ; then
+            echo "GeoIP is not requested"
+        else
+            echo "Requested GeoIP version is $GEOIP_VERSION"
+        fi
+        uninstall_geoip -r
+    fi
+
+    if [ ! -z "$installed_sbc_version" -a \
+              "$installed_sbc_version" != "$SBC_VERSION" ] ; then
+        echo "Installed SBC version is $installed_sbc_version"
+        if [ -z "$SBC_VERSION" ] ; then
+            echo "SBC is not requested"
+        else
+            echo "Requested SBC version is $SBC_VERSION"
+        fi
+        uninstall_sbc -r
+    fi
+
+    if [ ! -z "$installed_lz4_version" -a \
+              "$installed_lz4_version" != "$LZ4_VERSION" ] ; then
+        echo "Installed LZ4 version is $installed_lz4_version"
+        if [ -z "$LZ4_VERSION" ] ; then
+            echo "LZ4 is not requested"
+        else
+            echo "Requested LZ4 version is $LZ4_VERSION"
+        fi
+        uninstall_lz4 -r
+    fi
+
+    if [ ! -z "$installed_libxml2_version" -a \
+              "$installed_libxml2_version" != "$LIBXML2_VERSION" ] ; then
+        echo "Installed libxml2 version is $installed_libxml2_version"
+        if [ -z "$LIBXML2_VERSION" ] ; then
+            echo "libxml2 is not requested"
+        else
+            echo "Requested libxml2 version is $LIBXML2_VERSION"
+        fi
+        uninstall_libxml2 -r
+    fi
+
+    if [ ! -z "$installed_snappy_version" -a \
+              "$installed_snappy_version" != "$SNAPPY_VERSION" ] ; then
+        echo "Installed SNAPPY version is $installed_snappy_version"
+        if [ -z "$SNAPPY_VERSION" ] ; then
+            echo "SNAPPY is not requested"
+        else
+            echo "Requested SNAPPY version is $SNAPPY_VERSION"
+        fi
+        uninstall_snappy -r
+    fi
+
+    if [ ! -z "$installed_portaudio_version" -a \
+              "$installed_portaudio_version" != "$PORTAUDIO_VERSION" ] ; then
+        echo "Installed PortAudio version is $installed_portaudio_version"
+        if [ -z "$PORTAUDIO_VERSION" ] ; then
+            echo "PortAudio is not requested"
+        else
+            echo "Requested PortAudio version is $PORTAUDIO_VERSION"
+        fi
+        uninstall_portaudio -r
+    fi
+
+    if [ ! -z "$installed_lua_version" -a \
+              "$installed_lua_version" != "$LUA_VERSION" ] ; then
+        echo "Installed Lua version is $installed_lua_version"
+        if [ -z "$LUA_VERSION" ] ; then
+            echo "Lua is not requested"
+        else
+            echo "Requested Lua version is $LUA_VERSION"
+        fi
+        uninstall_lua -r
+    fi
+
+    if [ ! -z "$installed_gnutls_version" -a \
+              "$installed_gnutls_version" != "$GNUTLS_VERSION" ] ; then
+        echo "Installed GnuTLS version is $installed_gnutls_version"
+        if [ -z "$GNUTLS_VERSION" ] ; then
+            echo "GnuTLS is not requested"
+        else
+            echo "Requested GnuTLS version is $GNUTLS_VERSION"
+        fi
+        uninstall_gnutls -r
+    fi
+
+    if [ ! -z "$installed_nettle_version" -a \
+              "$installed_nettle_version" != "$NETTLE_VERSION" ] ; then
+        echo "Installed Nettle version is $installed_nettle_version"
+        if [ -z "$NETTLE_VERSION" ] ; then
+            echo "Nettle is not requested"
+        else
+            echo "Requested Nettle version is $NETTLE_VERSION"
+        fi
+        uninstall_nettle -r
+    fi
+
+    if [ ! -z "$installed_gmp_version" -a \
+              "$installed_gmp_version" != "$GMP_VERSION" ] ; then
+        echo "Installed GMP version is $installed_gmp_version"
+        if [ -z "$GMP_VERSION" ] ; then
+            echo "GMP is not requested"
+        else
+            echo "Requested GMP version is $GMP_VERSION"
+        fi
+        uninstall_gmp -r
+    fi
+
+    if [ ! -z "$installed_libgcrypt_version" -a \
+              "$installed_libgcrypt_version" != "$LIBGCRYPT_VERSION" ] ; then
+        echo "Installed libgcrypt version is $installed_libgcrypt_version"
+        if [ -z "$LIBGCRYPT_VERSION" ] ; then
+            echo "libgcrypt is not requested"
+        else
+            echo "Requested libgcrypt version is $LIBGCRYPT_VERSION"
+        fi
+        uninstall_libgcrypt -r
+    fi
+
+    if [ ! -z "$installed_libgpg_error_version" -a \
+              "$installed_libgpg_error_version" != "$LIBGPG_ERROR_VERSION" ] ; then
+        echo "Installed libgpg-error version is $installed_libgpg_error_version"
+        if [ -z "$LIBGPG_ERROR_VERSION" ] ; then
+            echo "libgpg-error is not requested"
+        else
+            echo "Requested libgpg-error version is $LIBGPG_ERROR_VERSION"
+        fi
+        uninstall_libgpg_error -r
+    fi
+
+    if [ ! -z "$installed_libsmi_version" -a \
+              "$installed_libsmi_version" != "$LIBSMI_VERSION" ] ; then
+        echo "Installed libsmi version is $installed_libsmi_version"
+        if [ -z "$LIBSMI_VERSION" ] ; then
+            echo "libsmi is not requested"
+        else
+            echo "Requested libsmi version is $LIBSMI_VERSION"
+        fi
+        uninstall_libsmi -r
+    fi
+
+    if [ ! -z "$installed_gtk_version" -a \
+              "$installed_gtk_version" != "$GTK_VERSION" ] ; then
+        echo "Installed GTK+ version is $installed_gtk_version"
+        if [ -z "$GTK_VERSION" ] ; then
+            echo "GTK+ is not requested"
+        else
+            echo "Requested GTK+ version is $GTK_VERSION"
+        fi
+        uninstall_gtk -r
+    fi
+
+    if [ ! -z "$installed_gdk_pixbuf_version" -a \
+              "$installed_gdk_pixbuf_version" != "$GDK_PIXBUF_VERSION" ] ; then
+        echo "Installed gdk-pixbuf version is $installed_gdk_pixbuf_version"
+        if [ -z "$GDK_PIXBUF_VERSION" ] ; then
+            echo "gdk-pixbuf is not requested"
+        else
+            echo "Requested gdk-pixbuf version is $GDK_PIXBUF_VERSION"
+        fi
+        uninstall_gdk_pixbuf -r
+    fi
+
+    if [ ! -z "$installed_pango_version" -a \
+              "$installed_pango_version" != "$PANGO_VERSION" ] ; then
+        echo "Installed Pango version is $installed_pango_version"
+        if [ -z "$PANGO_VERSION" ] ; then
+            echo "Pango is not requested"
+        else
+            echo "Requested Pango version is $PANGO_VERSION"
+        fi
+        uninstall_pango -r
+    fi
+
+    if [ ! -z "$installed_atk_version" -a \
+              "$installed_atk_version" != "$ATK_VERSION" ] ; then
+        echo "Installed ATK version is $installed_atk_version"
+        if [ -z "$ATK_VERSION" ] ; then
+            echo "ATK is not requested"
+        else
+            echo "Requested ATK version is $ATK_VERSION"
+        fi
+        uninstall_atk -r
+    fi
+
+    if [ ! -z "$installed_cairo_version" -a \
+              "$installed_cairo_version" != "$CAIRO_VERSION" ] ; then
+        echo "Installed Cairo version is $installed_cairo_version"
+        if [ -z "$CAIRO_VERSION" ] ; then
+            echo "Cairo is not requested"
+        else
+            echo "Requested Cairo version is $CAIRO_VERSION"
+        fi
+        uninstall_cairo -r
+    fi
+
+    if [ ! -z "$installed_pixman_version" -a \
+              "$installed_pixman_version" != "$PIXMAN_VERSION" ] ; then
+        echo "Installed pixman version is $installed_pixman_version"
+        if [ -z "$PIXMAN_VERSION" ] ; then
+            echo "pixman is not requested"
+        else
+            echo "Requested pixman version is $PIXMAN_VERSION"
+        fi
+        uninstall_pixman -r
+    fi
+
+    if [ ! -z "$installed_libpng_version" -a \
+              "$installed_libpng_version" != "$PNG_VERSION" ] ; then
+        echo "Installed libpng version is $installed_libpng_version"
+        if [ -z "$PNG_VERSION" ] ; then
+            echo "libpng is not requested"
+        else
+            echo "Requested libpng version is $PNG_VERSION"
+        fi
+        uninstall_libpng -r
+    fi
+
+    if [ ! -z "$installed_qt_version" -a \
+              "$installed_qt_version" != "$QT_VERSION" ] ; then
+        echo "Installed Qt version is $installed_qt_version"
+        if [ -z "$QT_VERSION" ] ; then
+            echo "Qt is not requested"
+        else
+            echo "Requested Qt version is $QT_VERSION"
+        fi
+        uninstall_qt -r
+    fi
+
+    if [ ! -z "$installed_glib_version" -a \
+              "$installed_glib_version" != "$GLIB_VERSION" ] ; then
+        echo "Installed GLib version is $installed_glib_version"
+        if [ -z "$GLIB_VERSION" ] ; then
+            echo "GLib is not requested"
+        else
+            echo "Requested GLib version is $GLIB_VERSION"
+        fi
+        uninstall_glib -r
+    fi
+
+    if [ ! -z "$installed_pkg_config_version" -a \
+              "$installed_pkg_config_version" != "$PKG_CONFIG_VERSION" ] ; then
+        echo "Installed pkg-config version is $installed_pkg_config_version"
+        if [ -z "$PKG_CONFIG_VERSION" ] ; then
+            echo "pkg-config is not requested"
+        else
+            echo "Requested pkg-config version is $PKG_CONFIG_VERSION"
+        fi
+        uninstall_pkg_config -r
+    fi
+
+    if [ ! -z "$installed_gettext_version" -a \
+              "$installed_gettext_version" != "$GETTEXT_VERSION" ] ; then
+        echo "Installed GNU gettext version is $installed_gettext_version"
+        if [ -z "$GETTEXT_VERSION" ] ; then
+            echo "GNU gettext is not requested"
+        else
+            echo "Requested GNU gettext version is $GETTEXT_VERSION"
+        fi
+        uninstall_gettext -r
+    fi
+
+    if [ ! -z "$installed_cmake_version" -a \
+              "$installed_cmake_version" != "$CMAKE_VERSION" ] ; then
+        echo "Installed CMake version is $installed_cmake_version"
+        if [ -z "$CMAKE_VERSION" ] ; then
+            echo "CMake is not requested"
+        else
+            echo "Requested CMake version is $CMAKE_VERSION"
+        fi
+        #
+        # XXX - really remove this?
+        # Or should we remember it as installed only if this script
+        # installed it?
+        #
+        uninstall_cmake -r
+    fi
+
+    if [ ! -z "$installed_libtool_version" -a \
+              "$installed_libtool_version" != "$LIBTOOL_VERSION" ] ; then
+        echo "Installed GNU libtool version is $installed_libtool_version"
+        if [ -z "$LIBTOOL_VERSION" ] ; then
+            echo "GNU libtool is not requested"
+        else
+            echo "Requested GNU libtool version is $LIBTOOL_VERSION"
+        fi
+        uninstall_libtool -r
+    fi
+
+    if [ ! -z "$installed_automake_version" -a \
+              "$installed_automake_version" != "$AUTOMAKE_VERSION" ] ; then
+        echo "Installed GNU automake version is $installed_automake_version"
+        if [ -z "$AUTOMAKE_VERSION" ] ; then
+            echo "GNU automake is not requested"
+        else
+            echo "Requested GNU automake version is $AUTOMAKE_VERSION"
+        fi
+        uninstall_automake -r
+    fi
+
+    if [ ! -z "$installed_autoconf_version" -a \
+              "$installed_autoconf_version" != "$AUTOCONF_VERSION" ] ; then
+        echo "Installed GNU autoconf version is $installed_autoconf_version"
+        if [ -z "$AUTOCONF_VERSION" ] ; then
+            echo "GNU autoconf is not requested"
+        else
+            echo "Requested GNU autoconf version is $AUTOCONF_VERSION"
+        fi
+        uninstall_autoconf -r
+    fi
+
+    if [ ! -z "$installed_lzip_version" -a \
+              "$installed_lzip_version" != "$LZIP_VERSION" ] ; then
+        echo "Installed lzip version is $installed_lzip_version"
+        if [ -z "$LZIP_VERSION" ] ; then
+            echo "lzip is not requested"
+        else
+            echo "Requested lzip version is $LZIP_VERSION"
+        fi
+        uninstall_lzip -r
+    fi
+
+    if [ ! -z "$installed_xz_version" -a \
+              "$installed_xz_version" != "$XZ_VERSION" ] ; then
+        echo "Installed xz version is $installed_xz_version"
+        if [ -z "$XZ_VERSION" ] ; then
+            echo "xz is not requested"
+        else
+            echo "Requested xz version is $XZ_VERSION"
+        fi
+        uninstall_xz -r
+    fi
+
+    #
+    # Start with xz: It is the sole download format of glib later than 2.31.2
+    #
+    install_xz
+
+    install_lzip
+
+    install_autoconf
+
+    install_automake
+
+    install_libtool
+
+    install_cmake
+
+    #
+    # Start with GNU gettext; GLib requires it, and macOS doesn't have it
+    # or a BSD-licensed replacement.
+    #
+    # At least on Lion with Xcode 4, _FORTIFY_SOURCE gets defined as 2
+    # by default, which causes, for example, stpncpy to be defined as
+    # a hairy macro that collides with the GNU gettext configure script's
+    # attempts to workaround AIX's lack of a declaration for stpncpy,
+    # with the result being a huge train wreck.  Define _FORTIFY_SOURCE
+    # as 0 in an attempt to keep the trains on separate tracks.
+    #
+    install_gettext
+
+    #
+    # GLib depends on pkg-config.
+    # By default, pkg-config depends on GLib; we break the dependency cycle
+    # by configuring pkg-config to use its own internal version of GLib.
+    #
+    install_pkg_config
+
+    install_glib
+
+    #
+    # Now we have reached a point where we can build everything but
+    # the GUI (Wireshark).
+    #
+    install_qt
+
+    if [ "$GTK_VERSION" ]; then
+        #
+        # GTK+ 3 requires a newer Cairo build than the one that comes with
+        # 10.6, so we build Cairo if we are using GTK+ 3.
+        #
+        # In 10.6 and 10.7, it's an X11 library; if we build with "native" GTK+
+        # rather than X11 GTK+, we might have to build and install Cairo.
+        # In 10.8 and later, there is no X11, but it's included in Xquartz;
+        # again, if we build with "native" GTK+, we'd have to build and install
+        # it.
+        #
+        if [[ "$GTK_MAJOR_VERSION" -eq 3 || "$cairo_not_in_the_os" = yes ]]; then
+            #
+            # Requirements for Cairo first
+            #
+            # The libpng that comes with the X11 for Leopard has a bogus
+            # pkg-config file that lies about where the header files are,
+            # which causes other packages not to be able to find its
+            # headers.
+            #
+            # The libpng in later versions is not what the version of
+            # libpixman we build below wants - it wants libpng15.
+            #
+            install_libpng
+
+            #
+            # The libpixman versions that come with the X11s for Leopard,
+            # Snow Leopard, and Lion is too old to support Cairo's image
+            # surface backend feature (which requires pixman-1 >= 0.22.0).
+            #
+            # XXX - what about the one that comes with the latest version
+            # of Xquartz?
+            #
+            install_pixman
+
+            #
+            # And now Cairo itself.
+            # XXX - with the libxcb that comes with 10.6,
+            # xcb_discard_reply() is missing, and the build fails.
+            #
+            install_cairo
+        fi
+
+        install_atk
+
+        install_pango
+
+        install_gdk_pixbuf
+
+        install_gtk
+    fi
+
+    #
+    # Now we have reached a point where we can build everything including
+    # the GUI (Wireshark), but not with any optional features such as
+    # SNMP OID resolution, some forms of decryption, Lua scripting, playback
+    # of audio, or GeoIP mapping of IP addresses.
+    #
+    # We now conditionally download optional libraries to support them;
+    # the default is to download them all.
+    #
+
+    install_libsmi
+
+    install_libgpg_error
+
+    install_libgcrypt
+
+    install_gmp
+
+    install_nettle
+
+    install_gnutls
+
+    install_lua
+
+    install_portaudio
+
+    install_snappy
+
+    install_libxml2
+
+    install_lz4
+
+    install_sbc
+
+    install_geoip
+
+    install_c_ares
+
+    install_libssh
+
+    install_nghttp2
+
+    install_libtiff
+
+    install_spandsp
+
+    install_bcg729
+}
+
+uninstall_all() {
+    if [ -d macosx-support-libs ]
+    then
+        cd macosx-support-libs
+
+        #
+        # Uninstall items in the reverse order from the order in which they're
+        # installed.  Only uninstall if the download/build/install process
+        # completed; uninstall the version that appears in the name of
+        # the -done file.
+        #
+        # We also do a "make distclean", so that we don't have leftovers from
+        # old configurations.
+        #
+	uninstall_bcg729
+
+	uninstall_spandsp
+
+	uninstall_libtiff
+
+        uninstall_nghttp2
+
+        uninstall_libssh
+
+        uninstall_c_ares
+
+        uninstall_geoip
+
+        uninstall_portaudio
+
+        uninstall_snappy
+
+        uninstall_libxml2
+
+        uninstall_lz4
+
+        uninstall_sbc
+
+        uninstall_lua
+
+        uninstall_gnutls
+
+        uninstall_nettle
+
+        uninstall_gmp
+
+        uninstall_libgcrypt
+
+        uninstall_libgpg_error
+
+        uninstall_libsmi
+
+        uninstall_gtk
+
+        uninstall_gdk_pixbuf
+
+        uninstall_pango
+
+        uninstall_atk
+
+        uninstall_cairo
+
+        uninstall_pixman
+
+        uninstall_libpng
+
+        uninstall_qt
+
+        uninstall_glib
+
+        uninstall_pkg_config
+
+        uninstall_gettext
+
+        #
+        # XXX - really remove this?
+        # Or should we remember it as installed only if this script
+        # installed it?
+        #
+        uninstall_cmake
+
+        uninstall_libtool
+
+        uninstall_automake
+
+        uninstall_autoconf
+
+        uninstall_lzip
+
+        uninstall_xz
+    fi
+}
+
+#
+# Do we have permission to write in /usr/local?
+#
+# If so, assume we have permission to write in its subdirectories.
+# (If that's not the case, this test needs to check the subdirectories
+# as well.)
+#
+# If not, do "make install", "make uninstall", the removes for Lua,
+# and the renames of [g]libtool* with sudo.
+#
+if [ -w /usr/local ]
+then
+    DO_MAKE_INSTALL="make install"
+    DO_MAKE_UNINSTALL="make uninstall"
+    DO_RM="rm"
+    DO_MV="mv"
+else
+    DO_MAKE_INSTALL="sudo make install"
+    DO_MAKE_UNINSTALL="sudo make uninstall"
+    DO_RM="sudo rm"
+    DO_MV="sudo mv"
+fi
+
+#
+# If we have SDKs available, the default target OS is the major version
+# of the one we're running; get that and strip off the third component
+# if present.
+#
+for i in /Developer/SDKs \
+    /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs \
+    /Library/Developer/CommandLineTools/SDKs
+do
+    if [ -d "$i" ]
+    then
+        min_osx_target=`sw_vers -productVersion | sed 's/\([0-9]*\)\.\([0-9]*\)\.[0-9]*/\1.\2/'`
+
+        #
+        # That's also the OS whose SDK we'd be using.
+        #
+        sdk_target=$min_osx_target
+        break
+    fi
+done
+
+#
+# Parse command-line flags:
+#
+# -h - print help.
+# -t <target> - build libraries so that they'll work on the specified
+# version of macOS and later versions.
+# -u - do an uninstall.
+# -n - download all packages, but don't build or install.
+#
+
+no_build=false
+
+while getopts ht:un name
+do
+    case $name in
+    u)
+        do_uninstall=yes
+        ;;
+    n)
+        no_build=true
+        ;;
+    t)
+        min_osx_target="$OPTARG"
+        ;;
+    h|?)
+        echo "Usage: macos-setup.sh [ -t <target> ] [ -u ] [ -n ]" 1>&1
+        exit 0
+        ;;
+    esac
+done
+
+#
+# Get the version numbers of installed packages, if any.
+#
+if [ -d macosx-support-libs ]
+then
+    cd macosx-support-libs
+
+    installed_xz_version=`ls xz-*-done 2>/dev/null | sed 's/xz-\(.*\)-done/\1/'`
+    installed_lzip_version=`ls lzip-*-done 2>/dev/null | sed 's/lzip-\(.*\)-done/\1/'`
+    installed_autoconf_version=`ls autoconf-*-done 2>/dev/null | sed 's/autoconf-\(.*\)-done/\1/'`
+    installed_automake_version=`ls automake-*-done 2>/dev/null | sed 's/automake-\(.*\)-done/\1/'`
+    installed_libtool_version=`ls libtool-*-done 2>/dev/null | sed 's/libtool-\(.*\)-done/\1/'`
+    installed_cmake_version=`ls cmake-*-done 2>/dev/null | sed 's/cmake-\(.*\)-done/\1/'`
+    installed_gettext_version=`ls gettext-*-done 2>/dev/null | sed 's/gettext-\(.*\)-done/\1/'`
+    installed_pkg_config_version=`ls pkg-config-*-done 2>/dev/null | sed 's/pkg-config-\(.*\)-done/\1/'`
+    installed_glib_version=`ls glib-*-done 2>/dev/null | sed 's/glib-\(.*\)-done/\1/'`
+    installed_qt_version=`ls qt-*-done 2>/dev/null | sed 's/qt-\(.*\)-done/\1/'`
+    installed_libpng_version=`ls libpng-*-done 2>/dev/null | sed 's/libpng-\(.*\)-done/\1/'`
+    installed_pixman_version=`ls pixman-*-done 2>/dev/null | sed 's/pixman-\(.*\)-done/\1/'`
+    installed_cairo_version=`ls cairo-*-done 2>/dev/null | sed 's/cairo-\(.*\)-done/\1/'`
+    installed_atk_version=`ls atk-*-done 2>/dev/null | sed 's/atk-\(.*\)-done/\1/'`
+    installed_pango_version=`ls pango-*-done 2>/dev/null | sed 's/pango-\(.*\)-done/\1/'`
+    installed_gdk_pixbuf_version=`ls gdk-pixbuf-*-done 2>/dev/null | sed 's/gdk-pixbuf-\(.*\)-done/\1/'`
+    installed_gtk_version=`ls gtk+-*-done 2>/dev/null | sed 's/gtk+-\(.*\)-done/\1/'`
+    installed_libsmi_version=`ls libsmi-*-done 2>/dev/null | sed 's/libsmi-\(.*\)-done/\1/'`
+    installed_libgpg_error_version=`ls libgpg-error-*-done 2>/dev/null | sed 's/libgpg-error-\(.*\)-done/\1/'`
+    installed_libgcrypt_version=`ls libgcrypt-*-done 2>/dev/null | sed 's/libgcrypt-\(.*\)-done/\1/'`
+    installed_gmp_version=`ls gmp-*-done 2>/dev/null | sed 's/gmp-\(.*\)-done/\1/'`
+    installed_nettle_version=`ls nettle-*-done 2>/dev/null | sed 's/nettle-\(.*\)-done/\1/'`
+    installed_gnutls_version=`ls gnutls-*-done 2>/dev/null | sed 's/gnutls-\(.*\)-done/\1/'`
+    installed_lua_version=`ls lua-*-done 2>/dev/null | sed 's/lua-\(.*\)-done/\1/'`
+    installed_portaudio_version=`ls portaudio-*-done 2>/dev/null | sed 's/portaudio-\(.*\)-done/\1/'`
+    installed_snappy_version=`ls snappy-*-done 2>/dev/null | sed 's/snappy-\(.*\)-done/\1/'`
+    installed_libxml2_version=`ls libxml2-*-done 2>/dev/null | sed 's/libxml2-\(.*\)-done/\1/'`
+    installed_lz4_version=`ls lz4-*-done 2>/dev/null | sed 's/lz4-\(.*\)-done/\1/'`
+    installed_sbc_version=`ls sbc-*-done 2>/dev/null | sed 's/sbc-\(.*\)-done/\1/'`
+    installed_geoip_version=`ls geoip-*-done 2>/dev/null | sed 's/geoip-\(.*\)-done/\1/'`
+    installed_cares_version=`ls c-ares-*-done 2>/dev/null | sed 's/c-ares-\(.*\)-done/\1/'`
+    installed_libssh_version=`ls libssh-*-done 2>/dev/null | sed 's/libssh-\(.*\)-done/\1/'`
+    installed_nghttp2_version=`ls nghttp2-*-done 2>/dev/null | sed 's/nghttp2-\(.*\)-done/\1/'`
+    installed_spandsp_version=`ls spandsp-*-done 2>/dev/null | sed 's/spandsp-\(.*\)-done/\1/'`
+    installed_libtiff_version=`ls tiff-*-done 2>/dev/null | sed 's/tiff-\(.*\)-done/\1/'`
+
+    #
+    # If we don't have a versioned -done file for portaudio, but do have
+    # an unversioned -done file for it, assume the installed version is the
+    # requested version, and rename the -done file to include that version.
+    #
+    if [ -z "$installed_portaudio_version" -a -f portaudio-done ] ; then
+        mv portaudio-done portaudio-$PORTAUDIO_VERSION-done
+        installed_portaudio_version=`ls portaudio-*-done 2>/dev/null | sed 's/portaudio-\(.*\)-done/\1/'`
+    fi
+
+    cd ..
+fi
+
+if [ "$do_uninstall" = "yes" ]
+then
+    uninstall_all
+    exit 0
+fi
+
+#
+# Configure scripts tend to set CFLAGS and CXXFLAGS to "-g -O2" if
+# invoked without CFLAGS or CXXFLAGS being set in the environment.
+#
+# However, we *are* setting them in the environment, for our own
+# nefarious purposes, so start them out as "-g -O2".
+#
+CFLAGS="-g -O2"
+CXXFLAGS="-g -O2"
+
+#
+# To make this work on Leopard (rather than working *on* Snow Leopard
+# when building *for* Leopard) will take more work.
+#
+# For one thing, Leopard's /usr/X11/lib/libXdamage.la claims, at least
+# with all software updates applied, that the Xdamage shared library
+# is libXdamage.1.0.0.dylib, but it is, in fact, libXdamage.1.1.0.dylib.
+# This causes problems when building GTK+, so the script would have to
+# fix that file.
+#
+if [[ $DARWIN_MAJOR_VERSION -le 9 ]]; then
+    echo "This script does not support any versions of macOS before Snow Leopard" 1>&2
+    exit 1
+fi
+
+# if no make options are present, set default options
+if [ -z "$MAKE_BUILD_OPTS" ] ; then
+    # by default use 1.5x number of cores for parallel build
+    MAKE_BUILD_OPTS="-j $(( $(sysctl -n hw.logicalcpu) * 3 / 2))"
+fi
+
+#
+# If we have a target release, look for the oldest SDK that's for an
+# OS equal to or later than that one, and build libraries against it
+# rather than against the headers and, more importantly, libraries
+# that come with the OS, so that we don't end up with support libraries
+# that only work on the OS version on which we built them, not earlier
+# versions of the same release, or earlier releases if the minimum is
+# earlier.
+#
+if [ ! -z "$min_osx_target" ]
+then
+    #
+    # Get the real version - strip off the "10.".
+    #
+    deploy_real_version=`echo "$min_osx_target" | sed -n 's/10\.\(.*\)/\1/p'`
+
+    #
+    # Search each directory that might contain SDKs.
+    #
+    sdkpath=""
+    for sdksdir in /Developer/SDKs \
+        /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs \
+        /Library/Developer/CommandLineTools/SDKs
+    do
+        #
+        # Get a list of all the SDKs.
+        #
+        if ! test -d "$sdksdir"
+        then
+            #
+            # There is no directory with that name.
+            # Move on to the next one in the list, if any.
+            #
+            continue
+        fi
+
+        #
+        # Get a list of all the SDKs in that directory, if any.
+        #
+        sdklist=`(cd "$sdksdir"; ls -d MacOSX10.[0-9]*.sdk 2>/dev/null)`
+
+        for sdk in $sdklist
+        do
+            #
+            # Get the real version for this SDK.
+            #
+            sdk_real_version=`echo "$sdk" | sed -n 's/MacOSX10\.\(.*\)\.sdk/\1/p'`
+
+            #
+            # Is it for the deployment target or some later release?
+            #
+            if test "$sdk_real_version" -ge "$deploy_real_version"
+            then
+                #
+                # Yes, use it.
+                #
+                sdkpath="$sdksdir/$sdk"
+                qt_sdk_arg="-sdk $sdk"
+                break 2
+            fi
+        done
+    done
+
+    if [ -z "$sdkpath" ]
+    then
+        echo "macos-setup.sh: Couldn't find an SDK for macOS $min_osx_target or later" 1>&2
+        exit 1
+    fi
+
+    SDKPATH="$sdkpath"
+    sdk_target=10.$sdk_real_version
+    echo "Using the 10.$sdk_real_version SDK"
+
+    #
+    # Make sure there are links to /usr/local/include and /usr/local/lib
+    # in the SDK's usr/local.
+    #
+    if [ ! -e $SDKPATH/usr/local/include ]
+    then
+        if [ ! -d $SDKPATH/usr/local ]
+        then
+            sudo mkdir $SDKPATH/usr/local
+        fi
+        sudo ln -s /usr/local/include $SDKPATH/usr/local/include
+    fi
+    if [ ! -e $SDKPATH/usr/local/lib ]
+    then
+        if [ ! -d $SDKPATH/usr/local ]
+        then
+            sudo mkdir $SDKPATH/usr/local
+        fi
+        sudo ln -s /usr/local/lib $SDKPATH/usr/local/lib
+    fi
+
+    #
+    # Set the minimum OS version for which to build to the specified
+    # minimum target OS version, so we don't, for example, end up using
+    # linker features supported by the OS verson on which we're building
+    # but not by the target version.
+    #
+    VERSION_MIN_FLAGS="-mmacosx-version-min=$min_osx_target"
+
+    #
+    # Compile and link against the SDK.
+    #
+    SDKFLAGS="-isysroot $SDKPATH"
+
+    if [[ "$min_osx_target" == "10.5" ]]
+    then
+        #
+        # Cairo is part of Mac OS X 10.6 and later.
+        # The *headers* are supplied by 10.5, but the *libraries*
+        # aren't, so we have to build it if we're building for 10.5.
+        #
+        cairo_not_in_the_os=yes
+
+        #
+        # Build with older versions of the support libraries, as
+        # were used on the Wireshark Leopard buildbot at one
+        # point.  (Most of these versions come from the About page
+        # from Wireshark 1.8.6, the last build done on that buildbot;
+        # the ATK version isn't reported, so this is a guess.)
+        #
+        # If you want to try building with newer versions of
+        # the libraries, note that:
+        #
+        # The version of fontconfig that comes with Leopard doesn't
+        # support FC_WEIGHT_EXTRABLACK, so we can't use any version
+        # of Pango newer than 1.22.4.
+        #
+        # However, Pango 1.22.4 doesn't work with versions of GLib
+        # after 2.29.6, because Pango 1.22.4 uses G_CONST_RETURN and
+        # GLib 2.29.8 and later deprecate it (there doesn't appear to
+        # be a GLib 2.29.7).  That means we'd either have to patch
+        # Pango not to use it (just use "const"; G_CONST_RETURN was
+        # there to allow code to choose whether to use "const" or not),
+        # or use GLib 2.29.6 or earlier.
+        #
+        # GLib 2.29.6 includes an implementation of g_bit_lock() that,
+        # on x86 (32-bit and 64-bit), uses asms in a fashion
+        # ("asm volatile goto") that requires GCC 4.5 or later, which
+        # is later than the compilers that come with Leopard and Snow
+        # Leopard.  Recent versions of GLib check for that, but 2.29.6
+        # doesn't, so, if you want to build GLib 2.29.6 on Leopard or
+        # Snow Leopard, you would have to patch glib/gbitlock.c to do
+        # what the newer versions of GLib do:
+        #
+        #  define a USE_ASM_GOTO macro that indicates whether "asm goto"
+        #  can be used:
+        #    #if (defined (i386) || defined (__amd64__))
+        #      #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+        #        #define USE_ASM_GOTO 1
+        #      #endif
+        #    #endif
+        #
+        #  replace all occurrences of
+        #
+        #    #if defined (__GNUC__) && (defined (i386) || defined (__amd64__))
+        #
+        #  with
+        #
+        #    #ifdef USE_ASM_GOTO
+        #
+        # Using GLib 2.29.6 or earlier, however, means that we can't
+        # use a version of ATK later than 2.3.93, as those versions
+        # don't work with GLib 2.29.6.  The same applies to gdk-pixbuf;
+        # versions of gdk-pixbuf after 2.24.1 won't work with GLib
+        # 2.29.6.
+        #
+        # Then you have to make sure that what you've build doesn't
+        # cause the X server that comes with Leopard to crash; at
+        # least one attempt at building for Leopard did.
+        #
+        # At least if building on Leopard, you might also find
+        # that, with various older versions of Cairo, including
+        # 1.6.4 and at least some 1.8.x versions, when you try to
+        # build it, the build fails because it can't find
+        # png_set_longjmp_fn().  I vaguely remember dealing with that,
+        # ages ago, but don't remember what I did.
+        #
+        GLIB_VERSION=2.16.3
+        if [ "$CAIRO_VERSION" ]
+        then
+            CAIRO_VERSION=1.6.4
+        fi
+        if [ "$ATK_VERSION" ]
+        then
+            ATK_VERSION=1.24.0
+        fi
+        if [ "$PANGO_VERSION" ]
+        then
+            PANGO_VERSION=1.20.2
+        fi
+        if [ "$GTK_VERSION" ]
+        then
+            GTK_VERSION=2.12.9
+        fi
+
+        #
+        # That version of GTK+ includes gdk-pixbuf.
+        # XXX - base this on the version of GTK+ requested.
+        #
+        GDK_PIXBUF_VERSION=
+
+        #
+        # Libgcrypt 1.5.0 fails to compile due to some problem with an
+        # asm in rijndael.c, at least with i686-apple-darwin10-gcc-4.2.1
+        # (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3) when building
+        # 32-bit.
+        #
+        # We try libgcrypt 1.4.3 instead, as that's what shows up in
+        # the version from the Leopard buildbot.
+        LIBGCRYPT_VERSION=1.4.3
+
+        #
+        # Build 32-bit while we're at it; Leopard has a bug that
+        # causes some BPF functions not to work with 64-bit userland
+        # code, so capturing won't work.
+        #
+        CFLAGS="$CFLAGS -arch i386"
+        CXXFLAGS="$CXXFLAGS -arch i386"
+        export LDFLAGS="$LDFLAGS -arch i386"
+    fi
+fi
+
+export CFLAGS
+export CXXFLAGS
+
+#
+# You need Xcode or the command-line tools installed to get the compilers.
+#
+if [ ! -x /usr/bin/xcodebuild ]; then
+    echo "Please install Xcode first (should be available on DVD or from the Mac App Store)."
+    exit 1
+fi
+
+if [ "$QT_VERSION" ]; then
+    #
+    # We need Xcode, not just the command-line tools, installed to build
+    # Qt.
+    #
+    # At least with Xcode 8, /usr/bin/xcodebuild --help fails if only
+    # the command-line tools are installed and succeeds if Xcode is
+    # installed.  Unfortunately, it fails *with* Xcode 3, but
+    # /usr/bin/xcodebuild -version works with that and with Xcode 8.
+    # Hopefully it fails with only the command-line tools installed.
+    #
+    if /usr/bin/xcodebuild -version >/dev/null 2>&1; then
+        :
+    else
+        echo "Please install Xcode first (should be available on DVD or from the Mac App Store)."
+        echo "The command-line build tools are not sufficient to build Qt."
+        exit 1
+    fi
+fi
+if [ "$GTK_VERSION" ]; then
+    #
+    # If we're building with GTK+, you also need the X11 SDK; with at least
+    # some versions of macOS and Xcode, that is, I think, an optional install.
+    # (Or it might be installed with X11, but I think *that* is an optional
+    # install on at least some versions of macOS.)
+    #
+    if [ ! -d /usr/X11/include ]; then
+        echo "Please install X11 and the X11 SDK first."
+        echo "  You can either download the latest package from"
+        echo "  http://www.xquartz.org/ and install it or install"
+        echo "  the native Apple package if you are on Lion or below."
+        exit 1
+    fi
+fi
+
+export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/usr/X11/lib/pkgconfig
+
+#
+# Do all the downloads and untarring in a subdirectory, so all that
+# stuff can be removed once we've installed the support libraries.
+#
+if [ ! -d macosx-support-libs ]
+then
+    mkdir macosx-support-libs || exit 1
+fi
+cd macosx-support-libs
+
+install_all
+
+echo ""
+
+#
+# Indicate what paths to use for pkg-config and cmake.
+#
+pkg_config_path=/usr/local/lib/pkgconfig
+if [ "$QT_VERSION" ]; then
+    qt_base_path=$HOME/Qt$QT_VERSION/$QT_MAJOR_MINOR_VERSION/clang_64
+    pkg_config_path="$pkg_config_path":"$qt_base_path/lib/pkgconfig"
+    CMAKE_PREFIX_PATH="$CMAKE_PREFIX_PATH":"$qt_base_path/lib/cmake"
+fi
+if [ "$GTK_VERSION" ]; then
+    pkg_config_path="$pkg_config_path":/usr/X11/lib/pkgconfig
+fi
+
+if $no_build; then
+    echo "All required dependencies downloaded. Run without -n to install them."
+    exit 0
+fi
+
+echo "You are now prepared to build Wireshark."
+echo
+if [[ $CMAKE ]]; then
+    echo "To build with CMAKE:"
+    echo
+    echo "export PKG_CONFIG_PATH=$pkg_config_path"
+    echo "export CMAKE_PREFIX_PATH=$CMAKE_PREFIX_PATH"
+    echo "export PATH=$PATH:$qt_base_path/bin"
+    echo
+    echo "mkdir build; cd build"
+    echo "cmake .."
+    echo "make $MAKE_BUILD_OPTS app_bundle"
+    echo "make install/strip"
+    echo
+fi
+if [[ $AUTOTOOLS ]]; then
+    echo "To build with AUTOTOOLS:"
+    echo
+    echo "export PKG_CONFIG_PATH=$pkg_config_path"
+    echo
+    echo "./autogen.sh"
+    echo "mkdir build; cd build"
+    echo "../configure"
+    echo "make $MAKE_BUILD_OPTS"
+    echo "make install"
+    echo
+fi
+echo "Make sure you are allowed capture access to the network devices"
+echo "See: https://wiki.wireshark.org/CaptureSetup/CapturePrivileges"
+echo
+
+exit 0