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llvm-project/llvm/cmake/modules/CheckCompilerVersion.cmake

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[docs] Increase minimum supported GCC version for building LLVM to 4.8 Summary: The RFC proposal sent to increase the minimum required GCC version to 4.8 received a lot of support. See the following thread: http://lists.llvm.org/pipermail/llvm-dev/2016-October/105955.html, This patch implements that by updating the docs. I believe the references to libstdc++ 4.7 issues can be removed as well, please let me know if that is not the case or if they should be updated a different way. Reviewers: rengolin Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D25683 llvm-svn: 284497
2016-10-19 01:17:37 +08:00
# Check if the host compiler is new enough. LLVM requires at least GCC 4.8,
[cmake] Check the compiler version first Otherwise users get messages from CheckAtomic about missing libatomic instead of a sensible message that says "use GCC 4.7 or newer". I structured the change along the lines of HandleLLVMStdlib.cmake, so that the standalone build of Clang still gets the compiler version check. Reviewers: beanz Differential Revision: http://reviews.llvm.org/D17789 llvm-svn: 262491
2016-03-03 00:42:56 +08:00
# MSVC 2013, or Clang 3.1.
cmake: include what you use Add a missing include. This is important in the case HandleLLVMOptions is included prior to the missing CheckCXXSourceCompiles or CheckCXXCompilerFlag which includes CheckCXXSourceCompiles. llvm-svn: 262949
2016-03-09 02:56:00 +08:00
include(CheckCXXSourceCompiles)
[cmake] Check the compiler version first Otherwise users get messages from CheckAtomic about missing libatomic instead of a sensible message that says "use GCC 4.7 or newer". I structured the change along the lines of HandleLLVMStdlib.cmake, so that the standalone build of Clang still gets the compiler version check. Reviewers: beanz Differential Revision: http://reviews.llvm.org/D17789 llvm-svn: 262491
2016-03-03 00:42:56 +08:00
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")
Reverting r285406, which was a temporary workaround to get one of the documentation bots upgraded to something newer than GCC 4.7. This restores the check for GCC 4.8. llvm-svn: 286822
2016-11-14 21:33:51 +08:00
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.8)
message(FATAL_ERROR "Host GCC version must be at least 4.8!")
[cmake] Check the compiler version first Otherwise users get messages from CheckAtomic about missing libatomic instead of a sensible message that says "use GCC 4.7 or newer". I structured the change along the lines of HandleLLVMStdlib.cmake, so that the standalone build of Clang still gets the compiler version check. Reviewers: beanz Differential Revision: http://reviews.llvm.org/D17789 llvm-svn: 262491
2016-03-03 00:42:56 +08:00
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)
Reverting r285406, which was a temporary workaround to get one of the documentation bots upgraded to something newer than GCC 4.7. This restores the check for GCC 4.8. llvm-svn: 286822
2016-11-14 21:33:51 +08:00
message(FATAL_ERROR "Host Clang must be able to find libstdc++4.8 or newer!")
[cmake] Check the compiler version first Otherwise users get messages from CheckAtomic about missing libatomic instead of a sensible message that says "use GCC 4.7 or newer". I structured the change along the lines of HandleLLVMStdlib.cmake, so that the standalone build of Clang still gets the compiler version check. Reviewers: beanz Differential Revision: http://reviews.llvm.org/D17789 llvm-svn: 262491
2016-03-03 00:42:56 +08:00
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()