Merge pull request swiftlang#1851 from vedantk/xcode-rt

Skip compiler-rt in Xcode-driven builds

Author: vedantk

utils/build-script-impl

@@ -490,7 +490,7 @@ function set_deployment_target_based_options() {
                 -DCMAKE_OSX_SYSROOT:PATH="$(xcrun --sdk ${xcrun_sdk_name} --show-sdk-path)"
                 -DLLVM_HOST_TRIPLE:STRING="${llvm_host_triple}"
                 -DLLVM_ENABLE_LIBCXX:BOOL=TRUE
-                -DLLVM_TOOL_COMPILER_RT_BUILD:BOOL="$(false_true ${#CROSS_COMPILE_TOOLS_DEPLOYMENT_TARGETS[@]})"
+                -DLLVM_TOOL_COMPILER_RT_BUILD:BOOL="$(false_true ${SKIP_COMPILER_RT})"
                 -DCOMPILER_RT_ENABLE_IOS:BOOL="$(false_true ${SKIP_IOS})"
                 -DCOMPILER_RT_ENABLE_WATCHOS:BOOL=FALSE
                 -DCOMPILER_RT_ENABLE_TVOS:BOOL=FALSE
@@ -738,6 +738,11 @@ if [[ "${SKIP_BUILD_WATCHOS_SIMULATOR}" ]] ; then
     SKIP_TEST_WATCHOS_SIMULATOR=1
 fi
 
+# FIXME: We currently do not support cross-compiling swift with compiler-rt.
+if [[ "${CROSS_COMPILE_TOOLS_DEPLOYMENT_TARGETS}" ]]; then
+    SKIP_COMPILER_RT=1
+fi
+
 # WORKSPACE, BUILD_DIR and INSTALLABLE_PACKAGE must be absolute paths
 case "${WORKSPACE}" in
     /*) ;;
@@ -1231,6 +1236,10 @@ case "${CMAKE_GENERATOR}" in
             "${COMMON_CMAKE_OPTIONS[@]}"
             -DCMAKE_CONFIGURATION_TYPES="Debug;Release;MinSizeRel;RelWithDebInfo"
         )
+
+        # FIXME: We currently do not support building compiler-rt with the
+        # Xcode generator.
+        SKIP_COMPILER_RT=1
         ;;
 esac