extmk.rb: replace current directory name

* ext/extmk.rb (extmake): replace "./" at beginning in LOCAL_LIBS
  with the current directory name for values cached in previous
  Makefile.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48932 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/extmk.rb

@@ -293,7 +293,7 @@ def extmake(target)
       unless $mswin
         $extflags = split_libs($extflags, $DLDFLAGS, $LDFLAGS).uniq.join(" ")
       end
-      $extlibs = merge_libs($extlibs, split_libs($libs), split_libs($LOCAL_LIBS))
+      $extlibs = merge_libs($extlibs, split_libs($libs, $LOCAL_LIBS).map {|lib| lib.sub(/\A\.\//, "ext/#{target}/")})
       $extpath |= $LIBPATH
     end
   ensure

ext/fiddle/extconf.rb

@@ -123,8 +123,7 @@ types.each do |type, signed|
 end
 
 if libffi
-  $LIBPATH.unshift libffi.lib
-  $LOCAL_LIBS.prepend("#{libffi.a} ").strip!
+  $LOCAL_LIBS.prepend("./#{libffi.a} ").strip!
 end
 create_makefile 'fiddle' do |conf|
   if !libffi
@@ -155,7 +154,6 @@ end
 
 if libffi
   $LIBPATH.pop
-  $LOCAL_LIBS.prepend("ext/fiddle/")
 end
 
 # :startdoc: