_GNU_SOURCE and __USE_GNU

Question

I want to use CPU_SET, which is a glibc linux-specific macro that should be defined in sched.h The manpage clearly states that _GNU_SOURCE

Answer 1

you have to define_GNU_SOURCE before anything else. This snippet works here:

#define _GNU_SOURCE
#include 


int main()
{
    cpu_set_t set;
    CPU_SET(0, &set);
    return 0;
}