On 10/24/2012 02:01 AM, Jim Meyering wrote: > When attempting to bootstrap grep.git using > autoconf.git (v2.69-37-gb9dc6b6), I see this failure: > > autoreconf: running: aclocal -I m4 -I m4 > configure.ac:81: error: AC_PROG_CC cannot be called after AM_PROG_CC_C_O Yeowch. Thanks for reporting this. The problem arises because Automake's AM_PROG_CC_C_O redefines AC_PROG_CC. We don't want to discourage people from using AC_PROG_CC, so this is an Autoconf bug. I installed this into Autoconf: >From 0cc5d3c97d4446dfb198e20f13b9850ee237ab3b Mon Sep 17 00:00:00 2001 From: Paul Eggert <eggert@xxxxxxxxxxx> Date: Wed, 24 Oct 2012 12:25:34 -0700 Subject: [PATCH] AC_PROG_CC_C89, AC_PROG_CC_C99, AC_PROG_CC_STDC: Use AU_DEFUN This fixes a bug introduced by the most recent change to c.m4. Problem reported by Jim Meyering in <http://lists.gnu.org/archive/html/autoconf/2012-10/msg00048.html>. * lib/autoconf/c.m4 (AC_PROG_CC_C89, AC_PROG_CC_C99, AC_PROG_CC_STDC): Use AU_DEFUN and AC_REQUIRE, not AU_ALIAS, as the latter is not compatible with how Automake redefines AC_PROG_CC. --- lib/autoconf/c.m4 | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/lib/autoconf/c.m4 b/lib/autoconf/c.m4 index 4a84489..0802f85 100644 --- a/lib/autoconf/c.m4 +++ b/lib/autoconf/c.m4 @@ -1448,15 +1448,27 @@ dnl preferably extc11. # AC_PROG_CC_C89 # -------------- -AU_ALIAS([AC_PROG_CC_C89], [AC_PROG_CC]) +# Do not use AU_ALIAS here and in AC_PROG_CC_C99 and AC_PROG_CC_STDC, +# as that'd be incompatible with how Automake redefines AC_PROG_CC. See +# <http://lists.gnu.org/archive/html/autoconf/2012-10/msg00048.html>. +AU_DEFUN([AC_PROG_CC_C89], + [AC_REQUIRE([AC_PROG_CC])], + [$0 is obsolete; use AC_PROG_CC] +) # AC_PROG_CC_C99 # -------------- -AU_ALIAS([AC_PROG_CC_C99], [AC_PROG_CC]) +AU_DEFUN([AC_PROG_CC_C99], + [AC_REQUIRE([AC_PROG_CC])], + [$0 is obsolete; use AC_PROG_CC] +) # AC_PROG_CC_STDC # --------------- -AU_ALIAS([AC_PROG_CC_STDC], [AC_PROG_CC]) +AU_DEFUN([AC_PROG_CC_STDC], + [AC_REQUIRE([AC_PROG_CC])], + [$0 is obsolete; use AC_PROG_CC] +) # AC_C_BACKSLASH_A -- 1.7.11.7 _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf
