From b79c50b8ba378fc5948f4e50017e31b0ec863c57 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 8 Feb 2008 06:09:23 +0000
Subject: * lib/mkmf.rb (xsystem): expand macros like as make.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@15402 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/mkmf.rb | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'lib')

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 96696b1f3..45bf90872 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -267,6 +267,12 @@ module Logging
 end
 
 def xsystem command
+  varpat = /\$\((\w+)\)|\$\{(\w+)\}/
+  if varpat =~ command
+    vars = Hash.new {|h, k| h[k] = ''; ENV[k]}
+    command = command.dup
+    nil while command.gsub!(varpat) {vars[$1||$2]}
+  end
   Logging::open do
     puts command.quote
     system(command)
-- 
cgit