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| author | Joel Rosdahl <joel@rosdahl.net> | 2020-11-12 20:40:08 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-11-12 20:40:08 +0100 |
| commit | ac13fb9a0ef7aabcf94ef7fdba1fc92f8e31c0a0 (patch) | |
| tree | 818501518144d2871fb669b369c2e72247e5d304 /cmake | |
| parent | 53519446d5b1b93531d5ddc69b531bb714cee6d2 (diff) | |
| download | ccache-ac13fb9a0ef7aabcf94ef7fdba1fc92f8e31c0a0.tar.gz | |
Link with libatomic when needed (#723)
Linking with libatomic is apparently needed when using <atomic>
functionality with GCC on ARM and PowerPC.
Diffstat (limited to 'cmake')
| -rw-r--r-- | cmake/StandardSettings.cmake | 2 | ||||
| -rw-r--r-- | cmake/StdAtomic.cmake | 31 |
2 files changed, 33 insertions, 0 deletions
diff --git a/cmake/StandardSettings.cmake b/cmake/StandardSettings.cmake index 88d8dff0..a0f0189c 100644 --- a/cmake/StandardSettings.cmake +++ b/cmake/StandardSettings.cmake @@ -47,6 +47,8 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "^GNU|(Apple)?Clang$") INTERFACE -fsanitize=${SANITIZER}) endforeach() + include(StdAtomic) + elseif(MSVC) target_compile_options(standard_settings INTERFACE /std:c++latest /Zc:preprocessor /Zc:__cplusplus /D_CRT_SECURE_NO_WARNINGS) endif() diff --git a/cmake/StdAtomic.cmake b/cmake/StdAtomic.cmake new file mode 100644 index 00000000..aa3bb4bf --- /dev/null +++ b/cmake/StdAtomic.cmake @@ -0,0 +1,31 @@ +# Check if std::atomic needs -latomic + +include(CheckCXXSourceCompiles) + +set(CMAKE_REQUIRED_FLAGS ${CMAKE_CXX11_STANDARD_COMPILE_OPTION}) +set( + check_std_atomic_source_code + [=[ + #include <atomic> + int main() + { + std::atomic<long long> x; + (void)x.load(); + return 0; + } + ]=]) + +check_cxx_source_compiles("${check_std_atomic_source_code}" std_atomic_without_libatomic) + +if(NOT std_atomic_without_libatomic) + set(CMAKE_REQUIRED_LIBRARIES atomic) + check_cxx_source_compiles("${check_std_atomic_source_code}" std_atomic_with_libatomic) + set(CMAKE_REQUIRED_LIBRARIES) + if(NOT std_atomic_with_libatomic) + message(FATAL_ERROR "Toolchain doesn't support std::atomic with nor without -latomic") + else() + target_link_libraries(standard_settings INTERFACE atomic) + endif() +endif() + +set(CMAKE_REQUIRED_FLAGS) |