[MacOS] thpool.c POSIX_C_SOURCE

[DimitriFourny]

Hello,

It doesn't compile on MacOS 12.0.1 because if POSIX_C_SOURCE is defined, pthread_setname_np() will not be declared in pthread.h. I have added that in thpool.c to make it works, not sure if it's the best solution here:

#if defined(__APPLE__) && defined(__MACH__)
int pthread_setname_np(const char*);
#endif

[noptrix]

@DimitriFourny thanks a lot! :D will check that later...