check_cxx_source_compiles("
	#include <unistd.h>  /* for syscall */
	#include <sys/syscall.h>  /* for SYS_getrandom */
	#include <linux/random.h>
	int main() {
		syscall(SYS_getrandom, nullptr, 0, 0);
		return 0;
	}
" HAVE_SYS_GETRANDOM)