check_c_source_compiles("
#include <pthread.h>
#include <signal.h>

int main(int argc, char *argv[])
{
	pthread_mutex_t mutex;
	pthread_mutexattr_t mutexattr;
	pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_RECURSIVE_NP);
	pthread_mutex_init(&mutex, &mutexattr);
	return (0);
}
" HAVE_PTHREAD_MUTEX_RECURSIVE_NP)