Re: [PATCH] AC_PROG_MKDIR_P: don't workaround if not buggy

[Eric Blake]

> * m4/gnulib-common.m4 (AC_PROG_MKDIR_P):
> Define only for Autoconf versions before 2.62.
> (AC_C_RESTRICT): Use documented AC_AUTOCONF_VERSION, not
> undocumented m4_PACKAGE_VERSION, for consistency with the
> abovementioned change to AC_PROG_MKDIR_P.  This should suffice
> since we're checking for 2.62 or later, and AC_AUTOCONF_VERSION
> was introduced in 2.62.
> ---

> +m4_if(m4_version_compare(m4_defn([AC_AUTOCONF_VERSION]),[2.62]),[-1],[

I still need to test to make sure, but I'm thinking this WON'T work
with 2.59.  m4_defn([undefined]) is fatal.

-- 
Eric Blake   address@hidden    +1-919-301-3266
Libvirt virtualization library http://libvirt.org