[PATCH libXext] add ACLOCAL_AMFLAGS = -I m4 to make aclocal pick ax_gcc_builtin.m4

[Matthieu Herrb]

On Sun, Mar 17, 2019 at 09:07:00AM -0700, Alan Coopersmith wrote:
> On 3/17/19 6:29 AM, Matthieu Herrb wrote:
> > Signed-off-by: Matthieu Herrb <matthieu at herrb.eu>
> > ---
> >   Makefile.am | 2 ++
> >   1 file changed, 2 insertions(+)
> > 
> > diff --git a/Makefile.am b/Makefile.am
> > index b76bc6c..4f5c67d 100644
> > --- a/Makefile.am
> > +++ b/Makefile.am
> > @@ -1,5 +1,7 @@
> >   SUBDIRS = man src specs
> > +ACLOCAL_AMFLAGS = -I m4
> > +
> >   pkgconfigdir = $(libdir)/pkgconfig
> >   pkgconfig_DATA = xext.pc
> > 
> 
> Hmm, the build worked fine for me here - what does this fix that I
> missed?

On OpenBSD, using automake 1.12 and autoconf 2.69, autoconf doesn't
find ax_gcc_builtin.m4 and configure ends eup with a stray

AX_GCC_BUILTIN([__builtin_popcountl])

line, causing a syntax error.

All other X.Org modules that provide ax_*.m4 files in m4, have the
"ACLOCAL_AMFLAGS = -I m4" line in Makefile.am.
(And autoreconf suggests to add it when missing)


-- 
Matthieu Herrb
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