From: Paul Eggert <eggert@cs.ucla.edu>
Date: Fri, 1 Dec 2023 17:58:37 +0000 (-0800)
Subject: Be more conservative about cache timestamps
X-Git-Tag: v2.72e~13
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=49ab3a4c5756d7ef40b03111f4c8a351d6bca7b8;p=thirdparty%2Fautoconf.git

Be more conservative about cache timestamps

* bin/autom4te.in (up_to_date): Fix thinko by using the
minimum of the cache files’ timestamps, not the maximum.
---

diff --git a/bin/autom4te.in b/bin/autom4te.in
index edc51fcfa..38a61ac91 100644
--- a/bin/autom4te.in
+++ b/bin/autom4te.in
@@ -948,11 +948,11 @@ sub up_to_date ($)
   return 0
     if ! -f $tfile || ! -f $ofile;
 
-  # The younger of the cache files must be older than the oldest of
-  # the dependencies.
+  # Both cache files must be younger than all dependencies,
+  # so use the minimum of the two cache files' timestamps.
   my $tmtime = mtime ($tfile);
   my $omtime = mtime ($ofile);
-  my ($file, $mtime) = ($tmtime < $omtime
+  my ($file, $mtime) = ($omtime < $tmtime
 			? ($ofile, $omtime) : ($tfile, $tmtime));
 
   # stdin is always out of date.