Add a --enable-osx-deploy-target option to set the deployment target

when building for OS X; that causes the MACOSX_DEPLOYMENT_TARGET
environment variable to be set when building (so that, for example, we
don't use linker features available on the version on which we're
building but not on the minimum OS version for which we're building),
and causes the SDK for that version to be used (so that, for example, we
don't link with libraries with later version numbers than the ones
provided with the OS version for which we're building).

svn path=/trunk/; revision=50410

1 files changed, 13 insertions, 1 deletions

diff --git a/packaging/macosx/osx-app.sh b/packaging/macosx/osx-app.sh
index 8227f2a1a1..e3bcd69a37 100755
--- a/packaging/macosx/osx-app.sh
+++ b/packaging/macosx/osx-app.sh
@@ -91,9 +91,11 @@ OPTIONS
 		specify the path to Info.plist. Info.plist can be found
 		in the base directory of the source code once configure
 		has been run.
+	-sdkroot
+		specify the root of the SDK to use
 
 EXAMPLE
-	$0 -s -l /opt/local -bp ../../Build/bin -p Info.plist
+	$0 -s -l /opt/local -bp ../../Build/bin -p Info.plist -sdkroot /Developer/SDKs/MacOSX10.5.sdk
 "
 }
 
@@ -117,6 +119,9 @@ do
 		-h|--help)
 			help
 			exit 0 ;;
+		-sdkroot)
+			sdkroot="$2"
+			shift 1 ;;
 		*)
 			echo "Invalid command line option: $1"
 			exit 2 ;;
@@ -160,6 +165,13 @@ else
 	EXTRALIBS=""
 fi
 
+# Set the SDK root, if an SDK was specified.
+# (-sdk is only supported by the xcodebuild in the version of the
+# developer tools that came with Snow Leopard and later versions)
+if [ ! -z "$sdkroot" ]
+then
+	XCODEFLAGS="$XCODEFLAGS SDKROOT=$sdkroot"
+fi
 
 # Package always has the same name. Version information is stored in
 # the Info.plist file which is filled in by the configure script.