This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
Re: [PATCH] Bump minimum autoconf version to 2.66
Yes, we want it to be 2.68, and in aclocal.m4 so it catches on fragments
too.
I committed this to enforce it. (Note there is no configure regeneration
mention because it comes out identical.)
2012-11-02 Roland McGrath <roland@hack.frob.com>
* aclocal.m4 (GLIBC_AUTOCONF_VERSION): New macro.
Check that AC_AUTOCONF_VERSION matches it and m4_fatal at
autoconf-time if not.
* configure.in: Remove AC_PREREQ.
diff --git a/aclocal.m4 b/aclocal.m4
index 60a5fea..3e61dc8 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1,3 +1,13 @@
+dnl We require that everyone use exactly the same Autoconf version so that
+dnl the internal functions defined and used by the main configure script
+dnl match those expected by the fragments.
+m4_define([GLIBC_AUTOCONF_VERSION], [2.68])
+m4_if(m4_defn([AC_AUTOCONF_VERSION]), GLIBC_AUTOCONF_VERSION, [],
+ [m4_fatal(m4_flatten(
+Exactly version GLIBC_AUTOCONF_VERSION of Autoconf is required but you have
+m4_defn([AC_AUTOCONF_VERSION])
+), [63])])dnl
+dnl
dnl We define the macro GLIBC_PROVIDES to do an AC_PROVIDE for each macro
dnl which appears in configure.in before the sysdep configure scripts are run.
dnl Each sysdep configure.in does GLIBC_PROVIDES first, to avoid any
diff --git a/configure.in b/configure.in
index 928b7b6..5e35b98 100644
--- a/configure.in
+++ b/configure.in
@@ -1,5 +1,5 @@
dnl Process this file with autoconf to produce a configure script.
-AC_PREREQ(2.53)dnl dnl Minimum Autoconf version required.
+dnl Note we do not use AC_PREREQ here! See aclocal.m4 for what we use instead.
AC_INIT([GNU C Library], [(see version.h)], [http://sourceware.org/bugzilla/], [glibc])
AC_CONFIG_SRCDIR([include/features.h])
AC_CONFIG_HEADERS([config.h])