diff options
Diffstat (limited to 'llvm/cmake/modules/CheckCompilerVersion.cmake')
| -rw-r--r-- | llvm/cmake/modules/CheckCompilerVersion.cmake | 72 |
1 files changed, 22 insertions, 50 deletions
diff --git a/llvm/cmake/modules/CheckCompilerVersion.cmake b/llvm/cmake/modules/CheckCompilerVersion.cmake index b1cb5527422..67f533f9aba 100644 --- a/llvm/cmake/modules/CheckCompilerVersion.cmake +++ b/llvm/cmake/modules/CheckCompilerVersion.cmake @@ -5,18 +5,13 @@ include(CheckCXXSourceCompiles) set(GCC_MIN 4.8) -set(GCC_SOFT_ERROR 5.1) +set(GCC_WARN 4.8) set(CLANG_MIN 3.1) -set(CLANG_SOFT_ERROR 3.5) +set(CLANG_WARN 3.1) set(APPLECLANG_MIN 3.1) -set(APPLECLANG_SOFT_ERROR 6.0) -set(MSVC_MIN 19.00.24213.1) -set(MSVC_SOFT_ERROR 19.1) - -# Map the above GCC versions to dates: https://gcc.gnu.org/develop.html#timeline -set(GCC_MIN_DATE 20130322) -set(GCC_SOFT_ERROR_DATE 20150422) - +set(APPLECLANG_WARN 3.1) +set(MSVC_MIN 19.0) +set(MSVC_WARN 19.00.24213.1) if(DEFINED LLVM_COMPILER_CHECKED) return() @@ -27,25 +22,21 @@ if(LLVM_FORCE_USE_OLD_TOOLCHAIN) return() endif() -function(check_compiler_version NAME NICE_NAME MINIMUM_VERSION SOFT_ERROR_VERSION) +function(check_compiler_version NAME NICE_NAME MINIMUM_VERSION WARN_VERSION) if(NOT CMAKE_CXX_COMPILER_ID STREQUAL NAME) return() endif() if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS MINIMUM_VERSION) message(FATAL_ERROR "Host ${NICE_NAME} version must be at least ${MINIMUM_VERSION}, your version is ${CMAKE_CXX_COMPILER_VERSION}.") - elseif(CMAKE_CXX_COMPILER_VERSION VERSION_LESS SOFT_ERROR_VERSION) - if(LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN) - message(WARNING "Host ${NICE_NAME} version should be at least ${SOFT_ERROR_VERSION} because LLVM will soon use new C++ features which your toolchain version doesn't support. Your version is ${CMAKE_CXX_COMPILER_VERSION}. Ignoring because you've set LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN, but very soon your toolchain won't be supported.") - else() - message(FATAL_ERROR "Host ${NICE_NAME} version should be at least ${SOFT_ERROR_VERSION} because LLVM will soon use new C++ features which your toolchain version doesn't support. Your version is ${CMAKE_CXX_COMPILER_VERSION}. You can temporarily opt out using LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN, but very soon your toolchain won't be supported.") - endif() + elseif(CMAKE_CXX_COMPILER_VERSION VERSION_LESS WARN_VERSION) + message(WARNING "Host ${NICE_NAME} version must be at least ${WARN_VERSION} due to miscompiles from earlier versions, your version is ${CMAKE_CXX_COMPILER_VERSION}.") endif() endfunction(check_compiler_version) -check_compiler_version("GNU" "GCC" ${GCC_MIN} ${GCC_SOFT_ERROR}) -check_compiler_version("Clang" "Clang" ${CLANG_MIN} ${CLANG_SOFT_ERROR}) -check_compiler_version("AppleClang" "Apple Clang" ${APPLECLANG_MIN} ${APPLECLANG_SOFT_ERROR}) -check_compiler_version("MSVC" "Visual Studio" ${MSVC_MIN} ${MSVC_SOFT_ERROR}) +check_compiler_version("GNU" "GCC" ${GCC_MIN} ${GCC_WARN}) +check_compiler_version("Clang" "Clang" ${CLANG_MIN} ${CLANG_WARN}) +check_compiler_version("AppleClang" "Apple Clang" ${APPLECLANG_MIN} ${APPLECLANG_WARN}) +check_compiler_version("MSVC" "Visual Studio" ${MSVC_MIN} ${MSVC_WARN}) if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang") if (CMAKE_CXX_SIMULATE_ID MATCHES "MSVC") @@ -54,39 +45,20 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang") endif() set(CLANG_CL 1) elseif(NOT LLVM_ENABLE_LIBCXX) - # Test that we aren't using too old of a version of libstdc++. + # Test that we aren't using too old of a version of libstdc++ + # with the Clang compiler. This is tricky as there is no real way to + # check the version of libstdc++ directly. Instead we test for a known + # bug in libstdc++4.6 that is fixed in libstdc++4.7. set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) set(OLD_CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES}) set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -std=c++0x") check_cxx_source_compiles(" -#include <iosfwd> -#if defined(__GLIBCXX__) -#if __GLIBCXX__ < ${GCC_MIN_DATE} -#error Unsupported libstdc++ version -#endif -#endif -int main() { return 0; } -" - LLVM_LIBSTDCXX_MIN) - if(NOT LLVM_LIBSTDCXX_MIN) - message(FATAL_ERROR "libstdc++ version must be at least ${GCC_MIN}.") - endif() - check_cxx_source_compiles(" -#include <iosfwd> -#if defined(__GLIBCXX__) -#if __GLIBCXX__ < ${GCC_SOFT_ERROR_DATE} -#error Unsupported libstdc++ version -#endif -#endif -int main() { return 0; } -" - LLVM_LIBSTDCXX_SOFT_ERROR) - if(NOT LLVM_LIBSTDCXX_SOFT_ERROR) - if(LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN) - message(WARNING "libstdc++ version should be at least ${GCC_SOFT_ERROR} because LLVM will soon use new C++ features which your toolchain version doesn't support. Ignoring because you've set LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN, but very soon your toolchain won't be supported.") - else() - message(FATAL_ERROR "libstdc++ version should be at least ${GCC_SOFT_ERROR} because LLVM will soon use new C++ features which your toolchain version doesn't support. You can temporarily opt out using LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN, but very soon your toolchain won't be supported.") - endif() +#include <atomic> +std::atomic<float> x(0.0f); +int main() { return (float)x; }" + LLVM_NO_OLD_LIBSTDCXX) + if(NOT LLVM_NO_OLD_LIBSTDCXX) + message(FATAL_ERROR "Host Clang must be able to find libstdc++4.8 or newer!") endif() set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) set(CMAKE_REQUIRED_LIBRARIES ${OLD_CMAKE_REQUIRED_LIBRARIES}) |
