From http://www.jwz.org/xscreensaver/xscreensaver-5.35.tar.gz

[xscreensaver] / OSX / xscreensaver.xcconfig

diff --git a/OSX/xscreensaver.xcconfig b/OSX/xscreensaver.xcconfig
index 10313ccf4edeffef6edbf1ac483b8654b23a71b4..c1a9cc246dd689db7d6ee86da6c1c45b99d9611d 100644 (file)
--- a/OSX/xscreensaver.xcconfig
+++ b/OSX/xscreensaver.xcconfig
@@ -1,7 +1,11 @@
 // To create builds that work properly on MacOS 10.6, Xcode 5.0.2 must
 // be used, since that is the latest version that supports garbage collection.
-// If the Xcode version is 5.02 or earlier, this must be set to "-fobjc-gc".
-// If the Xcode version is newer than that, this must be blank (and the
-// builds created will not work on 10.6.)
+// If the Xcode version is 5.02 or earlier, use these settings:
+//   "10.4", "-fobjc-gc", "-no-fobjc-gc"
+// If the Xcode version is later than that, use these settings:
+//   "10.6", "", ""
+// and the generate builds will only work on 10.6 or later.
 //
-OBJC_GC_CFLAGS=-fobjc-gc
+MACOSX_DEPLOYMENT_TARGET=10.7
+OBJC_GC_CFLAGS=
+OBJC_NO_GC_CFLAGS=