From b6807f8356c670bb3668378a796f45e3e32ba007 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 22 Oct 2008 16:24:58 +0000
Subject: * lib/mkmf.rb (create_tmpsrc): get rid of side effects.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19891 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/mkmf.rb | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'lib/mkmf.rb')

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index d95d748078..615b898429 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -323,9 +323,11 @@ EOM
 end
 
 def create_tmpsrc(src)
+  src = "#{COMMON_HEADERS}\n#{src}"
   src = yield(src) if block_given?
-  src[0, 0] = COMMON_HEADERS + "\n"
-  src = src.gsub(/[ \t]+$/, '').gsub(/\A\n+|^\n+$/, '').sub(/[^\n]\z/, "\\&\n")
+  src.gsub!(/[ \t]+$/, '')
+  src.gsub!(/\A\n+|^\n+$/, '')
+  src.sub!(/[^\n]\z/, "\\&\n")
   count = 0
   begin
     open(CONFTEST_C, "wb") do |cfile|
-- 
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