Re: warning _GL_ATTRIBUTE_SPEC_PRINTF_SYSTEM

[Mohammad Akhlaghi]

Thank you very much Paul,

I just pulled from Gnulib and built Gnuastro (both the most recent 
commits at this moment) and shown below. But the problem remained.

Gnulib:   90e79512d8b385801218d6e9c4d88ff77186560b
Gnuastro: c70f16c8f13ccdb8ad606a33a526846180748284

Just for the record, I am using GCC 10.2.0 and Glibc 2.32 and this is 
the last working Gnulib commit that I have checked:

Gnulib (working): e2739ba6310893be93d01a23cbfed8d8dfb08966 (Nov 11)

Since 'stdio.h' is a pretty basic library in Gnulib, and it is loading 
everything else properly, it may take some time for me to check (because 
I have dig into the low-level aspects of Gnulib which I am not too 
familiar with). Any tips/pointers would be appreciated.

I guess as a start, its easier for me to find the approximate commit 
that it is introduced in, I'll send you the results when I find it.

Cheers,
Mohammad

On 11/27/20 4:49 AM, Paul Eggert wrote:
> On 11/25/20 5:09 AM, Mohammad Akhlaghi wrote:
> > I just pulled the recent changes from Gnulib's 'master' branch and 
> > bootstrapped Gnuastro (which uses Gnulib) on my Arch GNU/Linux 
> > operating system.
> >
> > But I got many warnings related to '_GL_ATTRIBUTE_SPEC_PRINTF_SYSTEM' 
> > in 'error.h' and 'argp.h'. 
>
> I'm not seeing this with Fedora 33 x86-64 (see attached). I used 
> gnuastro commit c70f16c8f13ccdb8ad606a33a526846180748284 (Wed Nov 25 
> 21:32:37 2020 +0000) and Gnulib commit 
> 90e79512d8b385801218d6e9c4d88ff77186560b (Thu Nov 26 22:13:20 2020 +0100).
>
> I see that Bruno recently fixed some problems in this area in Gnulib, 
> and possibly this is contributing to the problem, whatever it is.
>
> I suggest bootstrapping from scratch with the latest Gnulib, and (if 
> that doesn't work) investigating why bootstrapped/lib/stdio.h's 
> definition of _GL_ATTRIBUTE_SPEC_PRINTF_SYSTEM isn't working for you.