+all_archs="x86_64 i386"
+valid_archs="x86_64 i386"
+ios_sdk_directory="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs"
+# only test arm code if iOS platform tools installed
+min_available_ios_sdk_version()
+{
+ ls "${ios_sdk_directory}" |
+ grep --invert-match --ignore-case "internal" | # exclude internal SDKs
+ sort --version-sort | head -n 1 | # take SDK with min version
+ sed "s/^iPhoneOS\(.*\)\.sdk$/\1/" # return only the version string
+}
+version_ge()
+{
+ test "$(printf '%s\n' "$@" | sort --version-sort | head -n 1)" == "$2";
+}
+if [ -d $ios_sdk_directory ]
+then
+ arm_arch="armv7"
+ # Newer SDKs don't support older architectures.
+ if version_ge "$(min_available_ios_sdk_version)" "11.0"
+ then
+ arm_arch="arm64"
+ fi
+ all_archs="${all_archs} ${arm_arch}"
+ valid_archs="${valid_archs} ${arm_arch}"
+fi
+