Merge pull request #2265 from shahmishal/master

Set toolchain CompatibilityVersion

Author: shahmishal

utils/build-script-impl

@@ -2561,11 +2561,13 @@ if [[ "${INSTALLABLE_PACKAGE}" ]] ; then
       DARWIN_TOOLCHAIN_INSTALL_LOCATION="/Library/Developer/Toolchains/${DARWIN_TOOLCHAIN_NAME}.xctoolchain"
       DARWIN_TOOLCHAIN_INFO_PLIST="${INSTALL_DESTDIR}/${TOOLCHAIN_PREFIX}/Info.plist"
       DARWIN_TOOLCHAIN_REPORT_URL="https://bugs.swift.org/"
+      COMPATIBILITY_VERSION=2
 
       echo "-- Removing: ${DARWIN_TOOLCHAIN_INFO_PLIST}"
       rm -f ${DARWIN_TOOLCHAIN_INFO_PLIST}
 
       ${PLISTBUDDY_BIN} -c "Add DisplayName string '${DARWIN_TOOLCHAIN_DISPLAY_NAME}'" "${DARWIN_TOOLCHAIN_INFO_PLIST}"
+      ${PLISTBUDDY_BIN} -c "Add CompatibilityVersion integer ${COMPATIBILITY_VERSION}" "${DARWIN_TOOLCHAIN_INFO_PLIST}"
       ${PLISTBUDDY_BIN} -c "Add Version string '${DARWIN_TOOLCHAIN_VERSION}'" "${DARWIN_TOOLCHAIN_INFO_PLIST}"
       ${PLISTBUDDY_BIN} -c "Add CFBundleIdentifier string '${DARWIN_TOOLCHAIN_BUNDLE_IDENTIFIER}'" "${DARWIN_TOOLCHAIN_INFO_PLIST}"
       ${PLISTBUDDY_BIN} -c "Add ReportProblemURL string '${DARWIN_TOOLCHAIN_REPORT_URL}'" "${DARWIN_TOOLCHAIN_INFO_PLIST}"