cmake HAVE_GETTID_SYSCALL examples

LiangliangNan/MVStudio 3rd_party/nlopt/CMakeLists.txt :117 

check_function_exists (syscall HAVE_GETTID_SYSCALL)

SWI-Prolog/swipl-devel cmake/Config.cmake :362 

check_c_source_compiles(
	"#include <unistd.h>
	 #include <sys/syscall.h>
	 int main()
	 { syscall(__NR_gettid);
	   return 0;
	 }"
        HAVE_GETTID_SYSCALL)

stevengj/nlopt CMakeLists.txt :94 

check_function_exists (syscall HAVE_GETTID_SYSCALL)

NVIDIA/cuda-quantum runtime/cudaq/algorithms/optimizers/nlopt/nlopt-src/CMakeLists.txt :44 

check_function_exists (syscall HAVE_GETTID_SYSCALL)