From 412166e185c00d6eacbe67dfcb0326f622ec4020 Mon Sep 17 00:00:00 2001
From: Xi Ruoyao <xry111@xry111.site>
Date: Fri, 30 Sep 2022 11:36:03 -0400
Subject: [PATCH] Fix testsuite failures with bash 5.2.
Bash v5.2 includes several new optimizations to the number of
subshells used for various constructs; as a side effect, the value of
SHLVL is less stable than it used to be. Add SHLVL to the list of
built-in shell variables with unstable values, to be ignored when
checking for inappropriate differences to the shell environment
before and after a macro invocation / between two configure runs.
Problem and solution reported by Xi Ruoyao in
https://lists.gnu.org/archive/html/autoconf/2022-09/msg00015.html
Problem also reported by Bruce Dubbs in
https://lists.gnu.org/archive/html/bug-autoconf/2022-09/msg00010.html
* tests/local.at (_AT_CHECK_ENV, AT_CONFIG_CMP): Ignore changes in
value of SHLVL.
Copyright-paperwork-exempt: yes
---
tests/local.at | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tests/local.at b/tests/local.at
index 193fd118..a9cf4050 100644
--- a/tests/local.at
+++ b/tests/local.at
@@ -352,7 +352,7 @@ m4_define([AT_CHECK_CONFIGURE],
# - AC_SUBST'ed variables
# (FIXME: Generate a list of these automatically.)
# - _|@|.[*#?$].|argv|ARGC|LINENO|OLDPWD|PIPESTATUS|RANDOM|SECONDS
-# |START_TIME|ToD|_AST_FEATURES
+# |SHLVL|START_TIME|ToD|_AST_FEATURES
# Some variables some shells use and change.
# '.[*#?$].' catches '$#' etc. which are displayed like this:
# | '!'=18186
@@ -404,7 +404,7 @@ if test -f state-env.before && test -f state-env.after; then
[GREP|[EF]GREP|SED],
[[_@]|.[*@%:@?$].],
[argv|ARGC|LINENO|BASH_ARGC|BASH_ARGV|OLDPWD|PIPESTATUS|RANDOM],
- [SECONDS|START_TIME|ToD|_AST_FEATURES]))=' \
+ [SECONDS|SHLVL|START_TIME|ToD|_AST_FEATURES]))=' \
$act_file ||
test $? -eq 1 || echo failed >&2
) 2>stderr-$act_file |
@@ -435,6 +435,7 @@ fi
# - PPID [bash, zsh]
# - RANDOM [bash, zsh]
# - SECONDS [bash, zsh]
+# - SHLVL [bash]
# - START_TIME [NetBSD sh]
# - ToD [NetBSD sh]
# - '$' [zsh]
@@ -483,6 +484,7 @@ do
/^PPID=/ d
/^RANDOM=/ d
/^SECONDS=/ d
+ /^SHLVL=/ d
/^START_TIME=/ d
/^ToD=/ d
/'\'\\\$\''=/ d
--
2.39.3