53 lines
2.2 KiB
CMake
53 lines
2.2 KiB
CMake
# Check if the host compiler is new enough. LLVM requires at least GCC 4.7,
|
|
# MSVC 2013, or Clang 3.1.
|
|
|
|
include(CheckCXXSourceCompiles)
|
|
|
|
if(NOT DEFINED LLVM_COMPILER_CHECKED)
|
|
set(LLVM_COMPILER_CHECKED ON)
|
|
|
|
if(NOT LLVM_FORCE_USE_OLD_TOOLCHAIN)
|
|
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
|
|
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
|
|
message(FATAL_ERROR "Host GCC version must be at least 4.7!")
|
|
endif()
|
|
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
|
|
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.1)
|
|
message(FATAL_ERROR "Host Clang version must be at least 3.1!")
|
|
endif()
|
|
|
|
if (CMAKE_CXX_SIMULATE_ID MATCHES "MSVC")
|
|
if (CMAKE_CXX_SIMULATE_VERSION VERSION_LESS 18.0)
|
|
message(FATAL_ERROR "Host Clang must have at least -fms-compatibility-version=18.0")
|
|
endif()
|
|
set(CLANG_CL 1)
|
|
elseif(NOT LLVM_ENABLE_LIBCXX)
|
|
# Otherwise, 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 "-std=c++0x")
|
|
check_cxx_source_compiles("
|
|
#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++4.7 or newer!")
|
|
endif()
|
|
set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
|
|
set(CMAKE_REQUIRED_LIBRARIES ${OLD_CMAKE_REQUIRED_LIBRARIES})
|
|
endif()
|
|
elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
|
|
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 18.0)
|
|
message(FATAL_ERROR "Host Visual Studio must be at least 2013")
|
|
elseif(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 18.0.31101)
|
|
message(WARNING "Host Visual Studio should at least be 2013 Update 4 (MSVC 18.0.31101)"
|
|
" due to miscompiles from earlier versions")
|
|
endif()
|
|
endif()
|
|
endif()
|
|
endif()
|