Seems that -Wl,-fatal_warnings causes more trouble than it's worth

The ld in 10.6 did not have that switch.

Change-Id: I53a581b26fae591eb6a696a053f985a917466820

solenv/gbuild/platform/macosx.mk

@@ -91,9 +91,7 @@ gb_OBJCXXFLAGS := -x objective-c++ -fobjc-exceptions
 gb_OBJCFLAGS := -x objective-c -fobjc-exceptions
 
 gb_LinkTarget_LDFLAGS := \
-	-Wl,-fatal_warnings \
 	$(SOLARLIB) \
-#man ld says: obsolete	-Wl,-multiply_defined,suppress \
 
 gb_DEBUG_CFLAGS := -g
 gb_COMPILEROPTFLAGS := -O2