patch to clean up generic signum.h

[Ulrich Drepper]

Zack Weinberg <zack@rabi.columbia.edu> writes:

> This patch gives the signal names in the generic signum.h their
> historical values where possible, tightens up standard compliance, and
> fixes a bug where programs referring to SIG_IGN or SIG_DFL would get
> link errors.

I've applied it without the #ifdef.

Thanks,

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