# HG changeset patch
# User erikj
# Date 1362465540 28800
# Node ID d778bb46a9a508113cbb1dfd59a48ef5a27ff91a
# Parent  27714220e50e44a9a88c48970cff08419976ded9
8008451: Make mac builds on 10.8 work on 10.7
Reviewed-by: jcoomes, ohair

diff -r 27714220e50e -r d778bb46a9a5 make/bsd/makefiles/gcc.make
--- a/make/bsd/makefiles/gcc.make	Mon Mar 04 12:42:14 2013 -0800
+++ b/make/bsd/makefiles/gcc.make	Mon Mar 04 22:39:00 2013 -0800
@@ -229,6 +229,20 @@
 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
 endif
 
+ifeq ($(OS_VENDOR), Darwin)
+  # Setting these parameters makes it an error to link to macosx APIs that are 
+  # newer than the given OS version and makes the linked binaries compatible even
+  # if built on a newer version of the OS.
+  # The expected format is X.Y.Z
+  ifeq ($(MACOSX_VERSION_MIN),)
+    MACOSX_VERSION_MIN=10.7.0
+  endif
+  # The macro takes the version with no dots, ex: 1070
+  CFLAGS += -DMAC_OS_X_VERSION_MAX_ALLOWED=$(subst .,,$(MACOSX_VERSION_MIN)) \
+            -mmacosx-version-min=$(MACOSX_VERSION_MIN)
+  LDFLAGS += -mmacosx-version-min=$(MACOSX_VERSION_MIN)
+endif
+
 #------------------------------------------------------------------------
 # Linker flags