diff --git a/configure/os/CONFIG_SITE.Common.darwin-x86 b/configure/os/CONFIG_SITE.Common.darwin-x86
index 9f9e7887b..7aad1537e 100644
--- a/configure/os/CONFIG_SITE.Common.darwin-x86
+++ b/configure/os/CONFIG_SITE.Common.darwin-x86
@@ -13,3 +13,11 @@
 ARCH_CLASS = i386
 #ARCH_CLASS = x86_64
 #ARCH_CLASS = i386 x86_64
+
+#
+# Uncomment the followings lines to build with CLANG instead of GCC.
+#
+#CC             = clang
+#CCC            = clang++
+#GNU_LDLIBS_YES =
+