[libvirt] [PATCH] build: use the gnulib version of the .m4 files when present

[Giuseppe Scrivano]

Giuseppe Scrivano <gscrivan at redhat.com> writes:

> prevent aclocal to prefer .m4 files under m4/ to the version provided
> by gnulib.
>
> I have noticed this after './configure --help' gave me two different
> versions of "--enable-threads".  This was caused by aclocal that
> preferred the version of lock.m4 provided by autopoint instead of
> using the newer version distributed with gnulib.
>
> Signed-off-by: Giuseppe Scrivano <gscrivan at redhat.com>

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