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Re: getopt compilation failure on Darwin (gzip 1.3.13)

From: Ludovic Courtès
Subject: Re: getopt compilation failure on Darwin (gzip 1.3.13)
Date: Wed, 07 Oct 2009 14:02:45 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)

Hi Eric,

Eric Blake <address@hidden> writes:

> The circle was:
> ./getopt.h did include_next <getopt.h>
>  <getopt.h> did include <unistd.h>, but found ./unistd.h
>   ./unistd.h did include_next <unistd.h>
>   <unistd.h> completed
>   ./unistd.h did include <getopt.h>, and found ./getopt.h
>    ./getopt.h declared things
>   ./unistd.h completed
>  <getopt.h> redeclared things
> The solution is to teach ./unistd.h to skip <getopt.h> if the system
> <getopt.h> was the guy including unistd.  That way, both the system
> <getopt.h> and <unistd.h> can run to completion prior to ./getopt.h
> declaring overrides.
> I will be pushing this, if further testing proves that it doesn't break
> Linux or FreeBSD.

Thanks for the quick reply and patch!

It now builds properly on GNU/Linux, Darwin, and Cygwin in NixOS/Nixpkgs
(see latest builds at http://hydra.nixos.org/job/nixpkgs/stdenv/gzip/all).


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