From: Jim Meyering <jim@meyering.net>
Date: Sat, 17 Mar 2001 22:12:03 +0000 (+0000)
Subject: Set/use $as_unset, for those shells
X-Git-Tag: FILEUTILS-4_0_42~13
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=d6a685271cdd8142fbd37904ca7d50e1fc2565b3;p=thirdparty%2Fcoreutils.git

Set/use $as_unset, for those shells
(like Ultrix4's /bin/sh) that don't accept `unset'.
---

diff --git a/tests/envvar-check b/tests/envvar-check
index 5784949d2a..880eaccfce 100644
--- a/tests/envvar-check
+++ b/tests/envvar-check
@@ -1,4 +1,10 @@
-unset VERSION_CONTROL SIMPLE_BACKUP_SUFFIX
+if (FOO=FOO; unset FOO) >/dev/null 2>&1; then
+  as_unset=unset
+else
+  as_unset=false
+fi
+
+$as_unset VERSION_CONTROL SIMPLE_BACKUP_SUFFIX
 
 if test "${VERSION_CONTROL+set}" = set; then
   echo "$0: the VERSION_CONTROL envvar is set --" \