* ext/extmk.rb, lib/mkmf.rb (with_config): support --with-extension

  options.  [ruby-dev:27449]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@9446 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 18 insertions, 4 deletions

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 9fe0d9bbfa..6150b59c9a 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -793,11 +793,25 @@ def arg_config(config, *defaults, &block)
   $configure_args.fetch(config.tr('_', '-'), *defaults, &block)
 end
 
-def with_config(config, *defaults, &block)
-  unless /^--with[-_]/ =~ config
-    config = '--with-' + config
+def with_config(config, *defaults)
+  config = config.sub(/^--with[-_]/, '')
+  val = arg_config("--with-"+config) do
+    if arg_config("--without-"+config)
+      false
+    elsif block_given?
+      yield(config, *defaults)
+    else
+      break *defaults
+    end
+  end
+  case val
+  when "yes"
+    true
+  when "no"
+    false
+  else
+    val
   end
-  arg_config(config, *defaults, &block)
 end
 
 def enable_config(config, *defaults)