* lib/mkmf.rb (dir_config): should not modify argument arrays

themselves.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27580 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sun May  2 07:38:43 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/mkmf.rb (dir_config): should not modify argument arrays
+	  themselves.
+
 Sat May  1 22:53:57 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/tempfile.rb (Tempfile#size): stat by path name when it is

lib/mkmf.rb

@@ -1340,7 +1340,7 @@ def dir_config(target, idefault=nil, ldefault=nil)
   ldir = with_config(target + "-lib", ldefault)
   $arg_config.last[1] ||= "${#{target}-dir}/lib"
 
-  idirs = idir ? Array === idir ? idir : idir.split(File::PATH_SEPARATOR) : []
+  idirs = idir ? Array === idir ? idir.dup : idir.split(File::PATH_SEPARATOR) : []
   if defaults
     idirs.concat(defaults.collect {|d| d + "/include"})
     idir = ([idir] + idirs).compact.join(File::PATH_SEPARATOR)
@@ -1353,7 +1353,7 @@ def dir_config(target, idefault=nil, ldefault=nil)
     end
   end
 
-  ldirs = ldir ? Array === ldir ? ldir : ldir.split(File::PATH_SEPARATOR) : []
+  ldirs = ldir ? Array === ldir ? ldir.dup : ldir.split(File::PATH_SEPARATOR) : []
   if defaults
     ldirs.concat(defaults.collect {|d| d + "/lib"})
     ldir = ([ldir] + ldirs).compact.join(File::PATH_SEPARATOR)