cmake COMPILER_RT_TARGET_HAS_FCNTL_LCK examples

Lewuathe/mlir-hello thirdparty/llvm-project/compiler-rt/lib/profile/CMakeLists.txt :25 

CHECK_CXX_SOURCE_COMPILES("
#if defined(__linux__)
#include <unistd.h>
#endif
#include <fcntl.h>
int fd;
int main() {
 struct flock s_flock;

 s_flock.l_type = F_WRLCK;
 fcntl(fd, F_SETLKW, &s_flock);
 return 0;
}

" COMPILER_RT_TARGET_HAS_FCNTL_LCK)

CTSRD-CHERI/cheribsd contrib/subrepo-cheri-compiler-rt/lib/profile/CMakeLists.txt :25 

CHECK_CXX_SOURCE_COMPILES("
#if defined(__linux__)
#include <unistd.h>
#endif
#include <fcntl.h>
int fd;
int main() {
 struct flock s_flock;

 s_flock.l_type = F_WRLCK;
 fcntl(fd, F_SETLKW, &s_flock);
 return 0;
}

" COMPILER_RT_TARGET_HAS_FCNTL_LCK)