Workaround for boost problem with the 10.7 SDK

Change-Id: I970326f084ef20fc9887e62adf95547c2468aebd

solenv/gbuild/platform/macosx.mk

@@ -75,6 +75,14 @@ gb_COMPILERDEFS += \
 
 endif
 
+# Without this I get struct/class clashes for "complex" when compiling
+# some source files in vcl, at least with the 10.7 SDK.
+ifneq ($(filter 1070,$(MACOSX_SDK_VERSION)),)
+gb_COMPILERDEFS += \
+		-DBOOST_DETAIL_NO_CONTAINER_FWD \
+
+endif
+
 ifeq ($(HAVE_GCC_NO_LONG_DOUBLE),TRUE)
 gb_CXXFLAGS += -Wno-long-double
 endif