diff options
author | Petr Hosek <phosek@chromium.org> | 2018-05-22 01:01:56 +0000 |
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committer | Petr Hosek <phosek@chromium.org> | 2018-05-22 01:01:56 +0000 |
commit | e3c8c25f305b6013e047407818730acd83f9b3b6 (patch) | |
tree | e8b639ebbc2646e01d58de4effa70a4162f87daa /cmake/Modules | |
parent | 4f8ac50ae47ddaac5ed5a1227744f4fd29a49976 (diff) |
[CMake] Use a different source depending on C++ support
When using system C++ library, assume we have a working C++ compiler and
try to compile a complete C++ program. When using in tree C++ library,
only check the C compiler since the C++ library likely won't have been
built yet at time of running the check.
Differential Revision: https://reviews.llvm.org/D47169
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@332924 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'cmake/Modules')
-rw-r--r-- | cmake/Modules/CompilerRTUtils.cmake | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/cmake/Modules/CompilerRTUtils.cmake b/cmake/Modules/CompilerRTUtils.cmake index f567202fa..506c06b60 100644 --- a/cmake/Modules/CompilerRTUtils.cmake +++ b/cmake/Modules/CompilerRTUtils.cmake @@ -125,6 +125,19 @@ endfunction() # 2) simple file can be successfully built. # If successful, saves target flags for this architecture. macro(test_target_arch arch def) + string(RANDOM TARGET_${arch}_NAME) + set(TARGET_${arch}_NAME "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/cmTC_${TARGET_${arch}_NAME}.dir") + file(MAKE_DIRECTORY ${TARGET_${arch}_NAME}) + if(SANITIZER_CXX_ABI_INTREE) + # We're using in tree C++ ABI, only test the C compiler for now. + set(TARGET_${arch}_FILENAME "${TARGET_${arch}_NAME}/CheckTarget.c") + file(WRITE "${TARGET_${arch}_FILENAME}" "#include <stdlib.h>\nint main() { void *p = malloc(1); return 0; }\n") + else() + # We're using the system C++ ABI, test that we can build C++ programs. + set(TARGET_${arch}_FILENAME "${TARGET_${arch}_NAME}/CheckTarget.cpp") + file(WRITE "${TARGET_${arch}_FILENAME}" "#include <new>\nint main() { int *p = new int; return 0; }\n") + endif() + set(TARGET_${arch}_CFLAGS ${ARGN}) set(TARGET_${arch}_LINK_FLAGS ${ARGN}) set(argstring "") @@ -144,7 +157,7 @@ macro(test_target_arch arch def) endif() set(SAVED_CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS}) set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${argstring}") - try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE} + try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${TARGET_${arch}_FILENAME} COMPILE_DEFINITIONS "${TARGET_${arch}_CFLAGS} ${FLAG_NO_EXCEPTIONS}" OUTPUT_VARIABLE TARGET_${arch}_OUTPUT) set(CMAKE_EXE_LINKER_FLAGS ${SAVED_CMAKE_EXE_LINKER_FLAGS}) @@ -157,6 +170,8 @@ macro(test_target_arch arch def) # Bail out if we cannot target the architecture we plan to test. message(FATAL_ERROR "Cannot compile for ${arch}:\n${TARGET_${arch}_OUTPUT}") endif() + + file(REMOVE_RECURSE ${TARGET_${arch}_NAME}) endmacro() macro(detect_target_arch) |