sys_nerr

[giva]

Why is this variable not declared in <errno.h>? An omission or...

[Pelle]

No. It's not part of standard C. It's not part of POSIX.

Pelle

[giva]

And EINTR is missing too. PellesC is the only compiler I ever have used
that misses this. Is there really no libc function that can set EINTR?

[giva]

No. It's not part of standard C. It's not part of POSIX.

So what? Neither are all the extension in <intrin.h>.
sys_nerr should IMHO be added. It is after all giving the bound
of errors that can be used in strerror().