/* Test GCC 8.1 -Wcast-function-type for https://bugs.python.org/issue33015
 *
 * Compiled on Linux with:
 * gcc x.c -o x -Wall -Wextra -lpthread
 *
 * Workaround the cast:
 * gcc x.c -o x -Wall -Wextra -lpthread -D UGLY_CAST
 */
#include <pthread.h>
#include <stdio.h>
/* No result value */
typedef void (*python_callback) (void *);
/* Result type: "void*" (untyped pointer) */
typedef void* (*pthread_callback) (void *);
void mythread(void * arg __attribute__((unused)))
{
 printf("hello from thread!\n");
 pthread_exit(0);
}
int test_cast(python_callback func)
{
 pthread_t thread;
 int res;
 void *arg = NULL;
 void *retval = NULL;
#ifdef UGLY_CAST
 pthread_callback func2 = (pthread_callback)(void *)func;
#else
 pthread_callback func2 = (pthread_callback)func;
#endif
 res = pthread_create(&thread, NULL, func2, arg);
 printf("pthread_create -> %i\n", res);
 if (res != 0) {
 printf("pthread_create failed\n");
 return 1;
 }
 res = pthread_join(thread, retval);
 printf("pthread_join -> %i\n", res);
 return (res == 0);
}
int main(void)
{
 return test_cast(mythread);
}
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