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dnl Macros that test for specific features.
dnl This file is part of the Autoconf packaging for Ethereal.
dnl Copyright (C) 1998-2000 by Gerald Combs.
dnl
dnl $Id: acinclude.m4,v 1.13 2002/02/06 09:58:30 guy Exp $
dnl
#
# AC_WIRETAP_PCAP_CHECK
#
AC_DEFUN(AC_WIRETAP_PCAP_CHECK,
[
if test -z "$pcap_dir"
then
#
# The user didn't specify a directory in which libpcap resides;
# we assume that the current library search path will work,
# but we may have to look for the header in a "pcap"
# subdirectory of "/usr/include" or "/usr/local/include",
# as some systems apparently put "pcap.h" in a "pcap"
# subdirectory, and we also check "$prefix/include".
#
# XXX - should we just add "$prefix/include" to the include
# search path?
#
AC_MSG_CHECKING(for extraneous pcap header directories)
found_pcap_dir=""
for pcap_dir in /usr/include/pcap /usr/local/include/pcap $prefix/include
do
if test -d $pcap_dir ; then
CFLAGS="$CFLAGS -I$pcap_dir"
CPPFLAGS="$CPPFLAGS -I$pcap_dir"
found_pcap_dir=" $found_pcap_dir -I$pcap_dir"
fi
done
if test "$found_pcap_dir" != "" ; then
AC_MSG_RESULT(found --$found_pcap_dir added to CFLAGS)
else
AC_MSG_RESULT(not found)
fi
else
#
# The user specified a directory in which libpcap resides,
# so add the "include" subdirectory of that directory to
# the include file search path.
#
# XXX - if there's also a libpcap in a directory that's
# already in CFLAGS, CPPFLAGS, or LDFLAGS, this won't
# make us find the version in the specified directory,
# as the compiler and/or linker will search that other
# directory before it searches the specified directory.
#
CFLAGS="$CFLAGS -I$pcap_dir/include"
CPPFLAGS="$CPPFLAGS -I$pcap_dir/include"
fi
# Pcap header check
AC_CHECK_HEADERS(pcap.h)
])
#
# AC_WIRETAP_ZLIB_CHECK
#
AC_DEFUN(AC_WIRETAP_ZLIB_CHECK,
[
AC_CHECK_HEADER(zlib.h,,enable_zlib=no)
if test x$enable_zlib != xno
then
#
# Well, we at least have the zlib header file.
#
# Check for "gzgets()" in zlib, because we need it, but
# some older versions of zlib don't have it. It appears
# from the zlib ChangeLog that any released version of zlib
# with "gzgets()" should have the other routines we
# depend on, such as "gzseek()", "gztell()", and "zError()".
#
# Another reason why we require "gzgets()" is that
# some versions of zlib that didn't have it, such
# as 1.0.8, had a bug in "gzseek()" that meant that it
# doesn't work correctly on uncompressed files; this
# means we cannot use version 1.0.8. (Unfortunately,
# that's the version that comes with recent X11 source,
# and many people who install XFree86 on their Slackware
# boxes don't realize that they should configure it to
# use the native zlib rather than building and installing
# the crappy old version that comes with XFree86.)
#
# I.e., we can't just avoid using "gzgets()", as
# versions of zlib without "gzgets()" are likely to have
# a broken "gzseek()".
#
AC_CHECK_LIB(z, gzgets,,enable_zlib=no)
fi
])
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