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• In reply to: R. Timothy Edwards: "Re: GLIBC problem with "errno""
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R. Timothy Edwards wrote:
> 
>    A quick grep of the source suggests that the problem is that
> file magic/tclmagic.c should have a line #include <errno.h>.  I
> would guess that the use of errno in tclmagic.c, line 904 without
> reference to any external variable is causing the problem.  Most
> compilers probably either recognize errno as a system global
> variable or else most systems are set up to include errno.h
> somewhere along the way.  I think gcc-3 stopped all this helpful
> behavior.

Yes, that'll be it. Quite dumb of me not to have looked for a tclmagic.c.

Anyway, I think using errno in this way is not safe with NPTL (i.e. 
errno is no longer plain extern int). It used to result in a warning 
with the 2.6 series kernel, but it's stopped working altogether in the 
later glibc versions.

All fixed after I added #include <errno.h> near the top of the file.

Cheers,

/.J

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