Spotted on the #gnu IRC channel:
checking for bison 2.4 or newer... 3.8.2, bad
in an environment where POSIXLY_CORRECT is set.
This patch should fix it.
2025-05-11 Bruno Haible <br...@clisp.org>
bison: Fix configure test failure if POSIXLY_CORRECT is set.
Reported by Arsen Arsenović.
* m4/bison.m4 (gl_PROG_BISON): In the bison invocation, put all options
before the non-option arguments.
diff --git a/m4/bison.m4 b/m4/bison.m4
index 9f0df25eed..170210bca8 100644
--- a/m4/bison.m4
+++ b/m4/bison.m4
@@ -1,5 +1,5 @@
# bison.m4
-# serial 10
+# serial 11
dnl Copyright (C) 2002-2006, 2008-2025 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -56,7 +56,7 @@ AC_DEFUN([gl_PROG_BISON]
AC_MSG_CHECKING([for bison $2 or newer])
ac_prog_version=`$$1 --version 2>&1 | sed -n 's/^.*GNU Bison.*
\([[0-9]]*\.[[0-9.]]*\).*$/\1/p'`
: ${ac_prog_version:='v. ?.??'}
- if $$1 conftest.y -o conftest.c 2>/dev/null; then
+ if $$1 -o conftest.c conftest.y 2>/dev/null; then
ac_prog_version="$ac_prog_version, ok"
ac_verc_fail=no
else
