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chore(cmake): Fix CheckAtomic.cmake to check sub-word atomics

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Platforms like riscv64 does have 32-bit or 64-bit atomics, but not 8-bit or 16-bit.

Modified `check_working_cxx_atomics` to check sub-word atomics as well.
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Eric Long 2022-09-08 01:49:43 +08:00
parent a6d15140b1
commit 8ab8b2fef9
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GPG Key ID: 583FAB4005C652BE
1 changed files with 5 additions and 2 deletions
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7
cmake/CheckAtomic.cmake
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@ -27,9 +27,12 @@ function(check_working_cxx_atomics varname)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -std=c++11") set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -std=c++11")
CHECK_CXX_SOURCE_COMPILES(" CHECK_CXX_SOURCE_COMPILES("
#include <atomic> #include <atomic>
std::atomic<int> x; #include <cstdint>
std::atomic<uint8_t> x1;
std::atomic<uint16_t> x2;
std::atomic<uint32_t> x3;
int main() { int main() {
return x; return ++x1 + ++x2 + ++x3;
} }
" ${varname}) " ${varname})
set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})