gold linker on command

Author: danoli3

libs/openFrameworksCompiled/project/linux/64/config.linux64.default.mk

@@ -27,5 +27,9 @@
 
 include $(OF_SHARED_MAKEFILES_PATH)/config.linux.common.mk
 
-PLATFORM_LDFLAGS += -fuse-ld=gold
-
+ifneq ($(shell command -v ld.gold),)
+	PLATFORM_LDFLAGS += -fuse-ld=gold
+	$(info Using Gold linker.)
+else
+	$(info Gold linker not found. Using default linker.)
+endif