gcc-4.9: How to generate Makefile.in from a modified Makefile.am?

[Svante Signell]

On Wed, 2014-03-26 at 16:30 +0100, Svante Signell wrote:
> On Wed, 2014-03-26 at 16:20 +0100, Andreas Schwab wrote:
> > Svante Signell <svante.signell@gmail.com> writes:
> > 
> > > autoconf 2.69:
> > 
> > You must use autoconf 2.65, exactly.
> 
> I thought autoconf versions were backwards compatible by now, obviously
> not. Is this ever going to happen?

Looks like the main src/configure.ac was generated for autoconf2.64:
AC_PREREQ(2.64)

(cd src/libgo/; autoconf)
configure.ac:10: error: Please use exactly Autoconf 2.64 instead of
2.65.

A mix of 2.64 and 2.65?