Re: stddef: Define 'unreachable', for ISO C 23 compliance

[Pádraig Brady]

On 10/04/2023 18:46, Bruno Haible wrote:
> Hi Pádraig,
>
> > > +/* Declare abort(), without including <stdlib.h>.  */
> > > +extern
> > > +#  if defined __cplusplus
> > > +"C"
> > > +#  endif
> > > +_Noreturn
> >
> > The above _Noreturn is causing a build failure on Solaris 10 on Sparc.
>
> A build failure of which package, which version?
>
> Can you please show the tail of the output of "make V=1"? I need to
> see whether it's a warning or an error (since I guess that you often
> compile with -Werror).
>
> >   From config.log:
> >
> >     $ gcc --version
> >     $ gcc (GCC) 3.4.3 (csl-sol210-3_4-branch+sol_rpath)
>
> Is this on a publicly accessible machine (e.g. in the GCC compile farm)?
> If so, that would speed up my reproduction.
>
> > Commenting out that _Noreturn allows the build to complete.
>
> Thanks for the hint; I'll consider this after analyzing.

Sorry for the terse info.
This is for the latest coreutils snapshot on a Solaris 10 machine only I have 
access to.
So a dist tarball, so an error not a warning.
https://www.pixelbeat.org/cu/coreutils-ss.tar.xz

End of build output is:

  CC       src/cksum-crctab.o
In file included from ./lib/time.h:50,
                 from /usr/include/sys/time.h:421,
                 from ./lib/sys/time.h:39,
                 from /usr/include/sys/select.h:23,
                 from ./lib/sys/select.h:36,
                 from 
/usr/sfw/lib/gcc/sparc-sun-solaris2.10/3.4.3/include/sys/types.h:631,
                 from ./lib/sys/types.h:39,
                 from ./lib/stdint.h:105,
                 from src/crctab.c:1:
./lib/stddef.h:175: error: syntax error before "void"