From f28ec8da8c08a90b19c85ceef0ee717c886d7841 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 13 Jun 2013 12:30:24 +0000
Subject: no alternate value expansion

* configure.in (opt-dir), tool/ifchange: get rid of "alternate value"
  expansion for legacy sh.  [ruby-dev:47420] [Bug #8524]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41280 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 tool/ifchange | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'tool/ifchange')

diff --git a/tool/ifchange b/tool/ifchange
index 5ff8276b03..c54b8fbb03 100755
--- a/tool/ifchange
+++ b/tool/ifchange
@@ -1,6 +1,7 @@
 #!/bin/sh
 # usage: ifchange target temporary
 
+set -e
 timestamp=
 keepsuffix=
 until [ "$0" = 0 ]; do
@@ -37,7 +38,7 @@ if cmp "$target" "$temp" >/dev/null 2>&1; then
     rm -f "$temp"
 else
     echo "$target updated"
-    ${keepsuffix:+ mv -f "$target" "${target}${keepsuffix}" }
+    [ x"${keepsuffix}" = x ] || mv -f "$target" "${target}${keepsuffix}"
     mv -f "$temp" "$target"
 fi
 
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