Re: gnulib tests in libvirt broken by newer glibc 2.26

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On Fri, Oct 06, 2017 at 07:59:13PM +0200, Bruno Haible wrote:
> Daniel P. Berrange wrote:
> > From my own F28 rawhide install with glibc-2.26.90-16.fc28.x86_64
> > 
> > > 
> > >   1) The output of
> > >      $ nm test-getopt-posix | grep getopt
> > 
> > $ nm test-getopt-posix | grep getopt
> >                  U getopt@@GLIBC_2.2.5
> > 0000000000400ab0 t getopt_loop.constprop.0
> > 0000000000400c50 t test_getopt
> > 
> > 
> > >   2) The output of
> > >      $ gcc -DHAVE_CONFIG_H -DGNULIB_STRICT_CHECKING=1 -I. -I.. -I../gllib -g -O2 -E test-getopt-posix.c
> > 
> > Attached in the file 'question-2.txt'
> > 
> > > 
> > >   3) The output of
> > >      $ gcc -DHAVE_CONFIG_H -DGNULIB_STRICT_CHECKING=1 -I. -I.. -I../gllib -g -O2 -E -dM test-getopt-posix.c
> > 
> > Attached in the file 'question-3.txt'
> 
> Thanks. From this, I can see that getopt-pfx-core.h does not get included
> at all. Please try this patch (or, if you don't want to re-run configure,
> just remove the "&& !defined __GLIBC__" from the generated unistd.h).
> 
> 
> diff --git a/lib/unistd.in.h b/lib/unistd.in.h
> index 748112f..b5b6e0e 100644
> --- a/lib/unistd.in.h
> +++ b/lib/unistd.in.h
> @@ -134,9 +134,8 @@
>  /* The definition of _GL_WARN_ON_USE is copied here.  */
>  
>  
> -/* Get getopt(), optarg, optind, opterr, optopt.
> -   But avoid namespace pollution on glibc systems.  */
> -#if @GNULIB_UNISTD_H_GETOPT@ && !defined __GLIBC__ && !defined _GL_SYSTEM_GETOPT
> +/* Get getopt(), optarg, optind, opterr, optopt.  */
> +#if @GNULIB_UNISTD_H_GETOPT@ && !defined _GL_SYSTEM_GETOPT
>  # include <getopt-cdefs.h>
>  # include <getopt-pfx-core.h>
>  #endif

Tested-by: Daniel P. Berrange <berrange@xxxxxxxxxx>


Confirmed it fixes the failure on Fedora 28, and does not cause a regression
on Fedora 26 with older glibc.

Regards,
Daniel
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