From: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Date: Fri, 15 Oct 2010 05:31:41 GMT
Subject: Re: [PATCH] compat: add memrchr()
Message-ID: <AANLkTinBuAhLLUMLd6ZWtVFWCjnFAxYwVSo1Pkja7bT4@mail.gmail.com>
In-Reply-To: <20101015051750.GA21830@burratino>

On Fri, Oct 15, 2010 at 05:17, Jonathan Nieder <jrnieder@gmail.com> wrote:
> Reimplement another handy convenience function from glibc.  memrchr()
> searches from the end of a memory area for a particular character.  It
> is similar to strrchr() but takes a length argument and is
> binary-safe.
>
> The whole-directory rename detection patch could use this to find the
> last directory separator in a (possibly truncated) pathname.

Maybe something like this for configure.ac:

    AC_CHECK_LIB([c], [memchr],
    [HAVE_MEMRCHR=YesPlease],
    [HAVE_MEMRCHR=])
    AC_SUBST(HAVE_MEMRCHR)

And documentation with the other HAVE_* variables at the top of the
Makefile?