[cmake] Also pass CMAKE_ASM_COMPILER_ID to next stage when bootstrapping

Summary:
When setting CMAKE_ASM_COMPILER=clang, we also need to set
CMAKE_ASM_COMPILER_ID=Clang.

This is needed because cmake won't set CMAKE_ASM_COMPILER_ID if
CMAKE_ASM_COMPILER is already set.

Without CMAKE_ASM_COMPILER_ID, cmake can't set
CMAKE_ASM_COMPILER_OPTIONS_TARGET either, which means
CMAKE_ASM_COMPILER_TARGET is ignored, causing cross compiling to fail,
i.e., `--target=${CMAKE_ASM_COMPILER_TARGET}` isn't passed.

Differential Revision: https://reviews.llvm.org/D42232

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@322977 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2eee8e6148f77b70da4cf9f5e2287ce9d6336179..a2fcaec9c394e674bcee9e3fe4d9f32c7b60cbdb 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -624,7 +624,8 @@ if (CLANG_ENABLE_BOOTSTRAP)
   set(COMPILER_OPTIONS
     -DCMAKE_CXX_COMPILER=${LLVM_RUNTIME_OUTPUT_INTDIR}/${CXX_COMPILER}
     -DCMAKE_C_COMPILER=${LLVM_RUNTIME_OUTPUT_INTDIR}/${C_COMPILER}
-    -DCMAKE_ASM_COMPILER=${LLVM_RUNTIME_OUTPUT_INTDIR}/${C_COMPILER})
+    -DCMAKE_ASM_COMPILER=${LLVM_RUNTIME_OUTPUT_INTDIR}/${C_COMPILER}
+    -DCMAKE_ASM_COMPILER_ID=Clang)
 
   if(BOOTSTRAP_LLVM_BUILD_INSTRUMENTED)
     add_dependencies(clang-bootstrap-deps llvm-profdata)