mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-21 02:29:22 +00:00
627445f3e6
Patch by Arrowdodger. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140064 91177308-0d34-0410-b5e6-96231b3b80d8
30 lines
755 B
CMake
30 lines
755 B
CMake
# atomic builtins are required for threading support.
|
|
|
|
INCLUDE(CheckCXXSourceCompiles)
|
|
|
|
CHECK_CXX_SOURCE_COMPILES("
|
|
#ifdef _MSC_VER
|
|
#include <windows.h>
|
|
#endif
|
|
int main() {
|
|
#ifdef _MSC_VER
|
|
volatile LONG val = 1;
|
|
MemoryBarrier();
|
|
InterlockedCompareExchange(&val, 0, 1);
|
|
InterlockedIncrement(&val);
|
|
InterlockedDecrement(&val);
|
|
#else
|
|
volatile unsigned long val = 1;
|
|
__sync_synchronize();
|
|
__sync_val_compare_and_swap(&val, 1, 0);
|
|
__sync_add_and_fetch(&val, 1);
|
|
__sync_sub_and_fetch(&val, 1);
|
|
#endif
|
|
return 0;
|
|
}
|
|
" LLVM_HAS_ATOMICS)
|
|
|
|
if( NOT LLVM_HAS_ATOMICS )
|
|
message(STATUS "Warning: LLVM will be built thread-unsafe because atomic builtins are missing")
|
|
endif()
|