Link error

[vardhasu]

Hi All

Do not know if this the right forum, but I get the following
undefined reference to `CPU_SET'

though I have included <sched.h>

Any ideas?

Regards

[wje_lf]

Yes. Please post a tiny, complete (compilable) program which illustrates the problem, and post the exact command you used to compile it, and post the exact, full error message you got (not a paraphrase).

[Y2JRedDevil]

Hi All

Do not know if this the right forum, but I get the following
undefined reference to `CPU_SET'

though I have included <sched.h>

Any ideas?

Regards

Yes, you need to compile with the flag -D_GNU_SOURCE,

so do:

gcc -D_GNU_SOURCE yourfile.c

Yes. Please post a tiny, complete (compilable) program which illustrates the problem

This is ridiculous. He comes asking for help with a compilation problem, and you ask him to give you a complete compilable program?

[gerard4143]

This is ridiculous. He comes asking for help with a compilation problem, and you ask him to give you a complete compilable program?

How is this ridiculous...the wanting to help...the wanting of more information to help...exactly how is this ridiculous...Gerard4143

[WuNMOjTIQanXWBcH]

Hi All

Do not know if this the right forum, but I get the following
undefined reference to `CPU_SET'

though I have included <sched.h>

To which Y2JRedDevil answered:

Yes, you need to compile with the flag -D_GNU_SOURCE,

Seeing that

$> man CPU_SET
[…]
SYNOPSIS
       #define _GNU_SOURCE
       #include <sched.h>
[…]
       void CPU_SET(int cpu, cpu_set_t *set);
[…]

cleary states that the feature test macro «_GNU_SOURCE» must be defined, it seems you are not familiar with those. To avoid future mistakes of the same nature, I recommend reading the man page of feature test macros: Man page / 7 – feature_test_macros

[Y2JRedDevil]

How is this ridiculous...the wanting to help...the wanting of more information to help...exactly how is this ridiculous...Gerard4143

- Hey, I've a compilation problem
- Ok, give me a compilable example

Help, ftw.