[CMake] Fix ASM building in llvm/runtimes

When compiler-rt's CMake is not directly invoked, it will currently not call
project() and thus ASM will not be enabled.
We also don't need to put the .S files through the C compiler then.

Differential Revision: https://reviews.llvm.org/D23656

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@279215 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 2 insertions, 21 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f72fb01fc..92eab598f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,14 +1,14 @@
 # CMake build for CompilerRT.
 #
 # This build assumes that CompilerRT is checked out into the
-# 'projects/compiler-rt' inside of an LLVM tree.
+# 'projects/compiler-rt' or 'runtimes/compiler-rt' inside of an LLVM tree.
 # Standalone build system for CompilerRT is not yet ready.
 #
 # An important constraint of the build is that it only produces libraries
 # based on the ability of the host toolchain to target various platforms.
 
 # Check if compiler-rt is built as a standalone project.
-if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR COMPILER_RT_STANDALONE_BUILD)
   project(CompilerRT C CXX ASM)
   set(COMPILER_RT_STANDALONE_BUILD TRUE)
 endif()
diff --git a/lib/tsan/CMakeLists.txt b/lib/tsan/CMakeLists.txt
index 1ce582138..7cdfc8df7 100644
--- a/lib/tsan/CMakeLists.txt
+++ b/lib/tsan/CMakeLists.txt
@@ -101,13 +101,6 @@ set_target_properties(tsan PROPERTIES FOLDER "Compiler-RT Misc")
 
 if(APPLE)
   set(TSAN_ASM_SOURCES rtl/tsan_rtl_amd64.S)
-  # Xcode will try to compile this file as C ('clang -x c'), and that will fail.
-  if (${CMAKE_GENERATOR} STREQUAL "Xcode")
-    enable_language(ASM)
-  else()
-    # Pass ASM file directly to the C++ compiler.
-    set_source_files_properties(${TSAN_ASM_SOURCES} PROPERTIES LANGUAGE C)
-  endif()
   add_compiler_rt_runtime(clang_rt.tsan
     SHARED
     OS ${TSAN_SUPPORTED_OS}
@@ -138,9 +131,6 @@ else()
   foreach(arch ${TSAN_SUPPORTED_ARCH})
     if(arch STREQUAL "x86_64")
       set(TSAN_ASM_SOURCES rtl/tsan_rtl_amd64.S)
-      # Pass ASM file directly to the C++ compiler.
-      set_source_files_properties(${TSAN_ASM_SOURCES} PROPERTIES
-        LANGUAGE C)
       # Sanity check for Go runtime.
       set(BUILDGO_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/go/buildgo.sh)
       add_custom_target(GotsanRuntimeCheck
@@ -152,19 +142,10 @@ else()
         VERBATIM)
     elseif(arch STREQUAL "aarch64")
       set(TSAN_ASM_SOURCES rtl/tsan_rtl_aarch64.S)
-      # Pass ASM file directly to the C++ compiler.
-      set_source_files_properties(${TSAN_ASM_SOURCES} PROPERTIES
-        LANGUAGE C)
    elseif(arch MATCHES "powerpc64|powerpc64le")
      set(TSAN_ASM_SOURCES rtl/tsan_rtl_ppc64.S)
-     # Pass ASM file directly to the C++ compiler.
-     set_source_files_properties(${TSAN_ASM_SOURCES} PROPERTIES
-       LANGUAGE C)
     elseif(arch MATCHES "mips64|mips64le")
      set(TSAN_ASM_SOURCES rtl/tsan_rtl_mips64.S)
-     # Pass ASM file directly to the C++ compiler.
-     set_source_files_properties(${TSAN_ASM_SOURCES} PROPERTIES
-       LANGUAGE C)
     else()
       set(TSAN_ASM_SOURCES)
     endif()