* ext/etc/extconf.rb: use expanded sysconfdir with empty DESTDIR.

[ruby-core:32394]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29268 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Thu Sep 16 08:27:36 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/etc/extconf.rb: use expanded sysconfdir with empty DESTDIR.
+	  [ruby-core:32394]
+
 Thu Sep 16 06:07:24 2010  Tanaka Akira  <akr@fsij.org>
 
 	* ext/pathname/pathname.c (path_rmdir): Pathname#rmdir translated

ext/etc/extconf.rb

@@ -4,7 +4,7 @@ have_library("sun", "getpwnam")	# NIS (== YP) interface for IRIX 4
 a = have_func("getlogin")
 b = have_func("getpwent")
 c = have_func("getgrent")
-sysconfdir = RbConfig.expand(RbConfig::MAKEFILE_CONFIG["sysconfdir"].dup, "prefix"=>"")
+sysconfdir = RbConfig.expand(RbConfig::CONFIG["sysconfdir"].dup, "prefix"=>"", "DESTDIR"=>"")
 $defs.push("-DSYSCONFDIR=#{Shellwords.escape(sysconfdir.dump)}")
 if  a or b or c or sysconfdir
   have_struct_member('struct passwd', 'pw_gecos', 'pwd.h')