diff -Nur llvm-3.3.src.orig/tools/clang/lib/Driver/ToolChains.cpp llvm-3.3.src/tools/clang/lib/Driver/ToolChains.cpp
--- llvm-3.3.src.orig/tools/clang/lib/Driver/ToolChains.cpp	2013-06-22 00:13:13.000000000 +0900
+++ llvm-3.3.src/tools/clang/lib/Driver/ToolChains.cpp	2013-06-22 00:14:43.000000000 +0900
@@ -1132,7 +1132,11 @@
     "i386-redhat-linux",
     "i586-suse-linux",
     "i486-slackware-linux",
-    "i686-montavista-linux"
+    "i686-montavista-linux",
+    "i686-gentoo-freebsd9.0",
+    "i686-gentoo-freebsd9.1",
+    "i686-gentoo-freebsd9.2",
+    "i686-gentoo-freebsd10.0"
   };
 
   static const char *const MIPSLibDirs[] = { "/lib" };