[Bug gas/21934] gas build fails when using gcc 7

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21934

--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Brett Neumeier from comment #4)
> (In reply to H.J. Lu from comment #3)
> > Here is a small testcase:
> > 
> > address@hidden config]$ cat /tmp/p.i
> > static char output_invalid_buf[sizeof (unsigned char) * 2 + 5];
> > 
> > char *
> > output_invalid (int c)
> > {
> >     __builtin_snprintf (output_invalid_buf, sizeof (output_invalid_buf),
> >           "(0x%x)", (unsigned char) c);
> >   return output_invalid_buf;
> > }
> > address@hidden config]$ gcc  -S -O2 -g -Wall /tmp/p.i -W
> > address@hidden config]$ gcc  -S -O2 -g -Wall /tmp/p.i -W -m32
> > address@hidden config]$ 
> > 
> > Please try it with your GCC 7.
> 
> OK!
> 
> address@hidden:/tmp$ x86_64-cbl-linux-gnu-gcc -S -O2 -g -Wall p.i -W
> address@hidden:/tmp$
> 
> That compilation succeeds and produces p.s, which I am attaching.

Why did gas fail to build for you with GCC 7?

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