Thanks for fixing that old bug of mine. I installed the attached further
patch to refactor and simplify. If I'd done it this way originally the
bug wouldn't have existed.From 6e3282fe3893a42eb9c5cc4eba5387a3be4e8d10 Mon Sep 17 00:00:00 2001
From: Paul Eggert <egg...@cs.ucla.edu>
Date: Tue, 28 Jun 2022 17:10:53 -0500
Subject: [PATCH] Refactor recent AC_FUNC_ALLOCA fix
* lib/autoconf/functions.m4 (AC_FUNC_ALLOCA): Simplify and use
AS_IF. Had I done it this way originally I would have avoided the
bug that Jim just fixed.
---
lib/autoconf/functions.m4 | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/lib/autoconf/functions.m4 b/lib/autoconf/functions.m4
index 51aeb0b9..70eb8760 100644
--- a/lib/autoconf/functions.m4
+++ b/lib/autoconf/functions.m4
@@ -426,10 +426,9 @@ if test $ac_cv_working_alloca_h = yes; then
fi
AC_CACHE_CHECK([for alloca], ac_cv_func_alloca_works,
-[if test $ac_cv_working_alloca_h = yes; then
- ac_cv_func_alloca_works=yes
-else
- AC_LINK_IFELSE([AC_LANG_PROGRAM(
+[ac_cv_func_alloca_works=$ac_cv_working_alloca_h
+AS_IF([test "$ac_cv_func_alloca_works" != yes],
+ [AC_LINK_IFELSE([AC_LANG_PROGRAM(
[[#include <stdlib.h>
#include <stddef.h>
#ifndef alloca
@@ -447,11 +446,7 @@ void *alloca (size_t);
#endif
]], [[char *p = (char *) alloca (1);
if (p) return 0;]])],
- [ac_cv_func_alloca_works=yes],
- [ac_cv_func_alloca_works=no]
- )
-fi
-])
+ [ac_cv_func_alloca_works=yes])])])
if test $ac_cv_func_alloca_works = yes; then
AC_DEFINE(HAVE_ALLOCA, 1,
--
2.36.1
