fix mac

BUG=

Review URL: https://codereview.chromium.org/19845003

git-svn-id: http://skia.googlecode.com/svn/trunk@10207 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/bbh_shootout.cpp b/tools/bbh_shootout.cpp
index 5b1d134..d86e5ff 100644
--- a/tools/bbh_shootout.cpp
+++ b/tools/bbh_shootout.cpp
@@ -380,7 +380,10 @@
     return 0;
 }
 
+#if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char** argv) {
     return tool_main(argc, argv);
 }
+#endif
+