Re: GNU M4 1.4.15 uses a buggy replacement strstr...

[Jeffrey Walton]

On Sat, Jan 9, 2021 at 10:28 AM Akim Demaille <akim@lrde.epita.fr> wrote:
>
> Hi Jeffrey,
>
> > Le 9 janv. 2021 à 13:56, Jeffrey Walton <noloader@gmail.com> a écrit :
> >
> > Hi Everyone,
> >
> > I'm trying to update Bison on Solaris 11.3. Configure is failing with:
> >
> > checking for GNU M4 that supports accurate traces... configure: error:
> > no acceptable m4 could be found in $PATH.
> > GNU M4 1.4.6 or later is required; 1.4.16 or newer is recommended.
> > GNU M4 1.4.15 uses a buggy replacement strstr on some systems.
> > Glibc 2.9 - 2.12 and GNU M4 1.4.11 - 1.4.15 have another strstr bug.
> >
> > Gnulib has strstr. Perhaps you can use it instead of spending time
> > with the old or buggy versions. Also see
> > https://www.gnu.org/software/gnulib/manual/gnulib.html#c_002dstrstr.
>
> Exactly.  So please, install a version of m4 that uses a version
> of gnulib recent enough.  Follow the advice and install the latest
> version of M4.

We don't have a choice in what the platform offers. It is what it is.

If you know you need strstr, unconditionally use the one provided by
Gnulib. That's why Gnulib exists.

Jeff