> From: Bruce Dubbs <[email protected]>
> Date: Sat, 4 Jun 2016 02:36:55 -0500
> Subject: Re: [blfs-support] Could someone please explain the purpose of the
>  sed used in building luit (Xorg apps)
>
> Hazel Russman wrote:
> > There are two Xorg applications that require an extra sed before
> > building: luit and sessreg. The book explains what the sessreg edit is
> > for, but not the more complicated luit edit. This should be remedied.
> >
> > In the meantime I would very much like to know what this header edit
> > achieves.
>
> It is used instead of a patch.
>
> It replaces
>
> #ifdef HAVE_CONFIG_H
>
> with
>
> #ifdef _XOPEN_SOURCE
> #  undef _XOPEN_SOURCE
> #  define _XOPEN_SOURCE 600
> #endif
>
> #ifdef HAVE_CONFIG_H
>
> in the file sys.c,  I do not remember why.
>


Looks like was added May 5th 2013:

  http://wiki.linuxfromscratch.org/blfs/changeset/11161

That may help narrow it down to reason for change - via lists/web-search/&c.



rgds,
akh





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