+all_archs="x86_64 i386"
+valid_archs="x86_64 i386"
+# only test arm code if iOS platform tools installed
+if [ -d /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs ]
+then
+ all_archs="${all_archs} armv7"
+ valid_archs="${valid_archs} armv7"
+fi
+