Paul Eggert wrote: > I can reproduce the problem when building GNU Emacs on Fedora 31 > (Autoconf 2.69, Automake 1.16.1, m4 1.4.18)
Good, that means the problem does not come from an older version of Automake. > by running the following recipe: > > mkdir d > cd d > git clone https://git.savannah.gnu.org/git/emacs.git > cd emacs > admin/merge-gnulib > ./autogen.sh Thanks for the simple-to-reproduce recipe. I've pushed this fix: 2020-01-10 Bruno Haible <br...@clisp.org> Fix major regression from 2020-01-04. Reported by Mats Erik Andersson <mats.anders...@gisladisker.se> in <https://lists.gnu.org/archive/html/bug-gnulib/2020-01/msg00072.html>. * m4/00gnulib.m4 (gl_COMPILER_PREPARE_CHECK_DECL): Define through AC_DEFUN_ONCE. (AC_CHECK_DECL): Invoke, not require, it. diff --git a/m4/00gnulib.m4 b/m4/00gnulib.m4 index 77503ea..58bc4ef 100644 --- a/m4/00gnulib.m4 +++ b/m4/00gnulib.m4 @@ -1,4 +1,4 @@ -# 00gnulib.m4 serial 4 +# 00gnulib.m4 serial 5 dnl Copyright (C) 2009-2020 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -62,7 +62,7 @@ barfbarf [gl_cv_compiler_clang=no]) ]) ]) -AC_DEFUN([gl_COMPILER_PREPARE_CHECK_DECL], +AC_DEFUN_ONCE([gl_COMPILER_PREPARE_CHECK_DECL], [ AC_REQUIRE([AC_PROG_CC]) AC_REQUIRE([gl_COMPILER_CLANG]) @@ -95,10 +95,11 @@ m4_define([_AC_CHECK_DECL_BODY], m4_defn([_AC_CHECK_DECL_BODY])[ ac_compile="$ac_save_ac_compile" ]) ]) -dnl Redefine AC_CHECK_DECL so that it starts with -dnl AC_REQUIRE([gl_COMPILER_PREPARE_CHECK_DECL]). +dnl Redefine AC_CHECK_DECL so that it starts with an invocation of +dnl gl_COMPILER_PREPARE_CHECK_DECL. m4_define([AC_CHECK_DECL], - [AC_REQUIRE([gl_COMPILER_PREPARE_CHECK_DECL])]m4_defn([AC_CHECK_DECL])) + [gl_COMPILER_PREPARE_CHECK_DECL dnl +]m4_defn([AC_CHECK_DECL])) # gl_00GNULIB # -----------
