diff options
author | Joerg Bornemann <joerg.bornemann@qt.io> | 2020-04-28 17:33:29 +0200 |
---|---|---|
committer | Joerg Bornemann <joerg.bornemann@qt.io> | 2020-04-29 23:08:32 +0200 |
commit | 062b50abff6a3cb2319ade41dddf76caa36f27e3 (patch) | |
tree | 7a0ec6ab28500b2a84d6edcc240d9bc6a309549d /cmake/FindWrapAtomic.cmake | |
parent | 317cfb677464a9610e4b46971e508b90f59b90f6 (diff) |
CMake: Namespace all our IMPORTED targets
CMake IMPORTED targets should be namespaced so that CMake knows that
the name refers to a target and not a file.
Use the existing WrapXXX naming scheme where applicable.
Fixes: QTBUG-83773
Change-Id: I5b0b722c811200c56c260c69e76940a625228769
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Diffstat (limited to 'cmake/FindWrapAtomic.cmake')
-rw-r--r-- | cmake/FindWrapAtomic.cmake | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/cmake/FindWrapAtomic.cmake b/cmake/FindWrapAtomic.cmake new file mode 100644 index 0000000000..c65ee1da06 --- /dev/null +++ b/cmake/FindWrapAtomic.cmake @@ -0,0 +1,44 @@ +# We can't create the same interface imported target multiple times, CMake will complain if we do +# that. This can happen if the find_package call is done in multiple different subdirectories. +if(TARGET WrapAtomic::WrapAtomic) + set(WrapAtomic_FOUND ON) + return() +endif() + +include(CheckCXXSourceCompiles) + +set (atomic_test_sources "#include <atomic> +#include <cstdint> + +void test(volatile std::atomic<std::int64_t> &a) +{ + std::int64_t v = a.load(std::memory_order_acquire); + while (!a.compare_exchange_strong(v, v + 1, + std::memory_order_acq_rel, + std::memory_order_acquire)) { + v = a.exchange(v - 1); + } + a.store(v + 1, std::memory_order_release); +} + +int main(int, char **) +{ + void *ptr = (void*)0xffffffc0; // any random pointer + test(*reinterpret_cast<std::atomic<std::int64_t> *>(ptr)); + return 0; +}") + +check_cxx_source_compiles("${atomic_test_sources}" HAVE_STDATOMIC) +if(NOT HAVE_STDATOMIC) + set(_req_libraries "${CMAKE_REQUIRE_LIBRARIES}") + set(CMAKE_REQUIRE_LIBRARIES "atomic") + check_cxx_source_compiles("${atomic_test_sources}" HAVE_STDATOMIC_WITH_LIB) + set(CMAKE_REQUIRE_LIBRARIES "${_req_libraries}") +endif() + +add_library(WrapAtomic::WrapAtomic INTERFACE IMPORTED) +if(HAVE_STDATOMIC_WITH_LIB) + target_link_libraries(WrapAtomic::WrapAtomic INTERFACE atomic) +endif() + +set(WrapAtomic_FOUND 1) |