[Bug build/21087] New: Configuring gdb with --enable-maintainer-mode fails with autoconf version error

["lgustavo at codesourcery dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=21087

            Bug ID: 21087
           Summary: Configuring gdb with --enable-maintainer-mode fails
                    with autoconf version error
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: lgustavo at codesourcery dot com
  Target Milestone: ---

Reported on IRC. Attempting to configure master binutils-gdb with
--enable-maintainer-mode fails due to an autoconf version check from src/intl:

make[2]: Entering directory '/fsf/build-binutils-gdb-maintainer/intl'
cd ../../binutils-gdb/intl && aclocal -I ../config
configure.ac:2: error: Please use exactly Autoconf 2.64 instead of 2.69.
../config/override.m4:12: _GCC_AUTOCONF_VERSION_CHECK is expanded from...
configure.ac:2: the top level
autom4te: m4 failed with exit status: 1
aclocal: error: echo failed with exit status: 1
Makefile:236: recipe for target '../../binutils-gdb/intl/aclocal.m4' failed
make[2]: *** [../../binutils-gdb/intl/aclocal.m4] Error 1
make[2]: Leaving directory '/fsf/build-binutils-gdb-maintainer/intl'
Makefile:6567: recipe for target 'all-intl' failed
make[1]: *** [all-intl] Error 2
make[1]: Leaving directory '/fsf/build-binutils-gdb-maintainer'
Makefile:849: recipe for target 'all' failed
make: *** [all] Error 2

It has also been reported that switching to Autoconf 2.64 will then cause
gnulib to complain about Autoconf being too old a version:

make[4]: Entering directory `build/binutils-gdb/gdb/build-gnulib'
cd /binutils-gdb/gdb/gnulib && aclocal -I import/m4 -I ../../config
configure.ac:38: error: Autoconf version 2.65 or higher is required

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