* lib/mkmf.rb (have_framework): try as Objective-C.

https://twitter.com/nagachika/status/120294447660539904

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33372 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sat Oct  1 20:03:19 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/mkmf.rb (have_framework): try as Objective-C.
+	  https://twitter.com/nagachika/status/120294447660539904
+
 Sun Oct  2 08:43:25 2011  Kazuki Tsujimoto  <kazuki@callcc.net>
 
 	* vm.c (rb_thread_mark), cont.c (cont_mark): self pointer should not

lib/mkmf.rb

@@ -947,7 +947,7 @@ end
 def have_framework(fw, &b)
   checking_for fw do
     src = cpp_include("#{fw}/#{fw}.h") << "\n" "int main(void){return 0;}"
-    if try_link(src, opt = "-framework #{fw}", &b)
+    if try_link(src, opt = "-ObjC -framework #{fw}", &b)
       $defs.push(format("-DHAVE_FRAMEWORK_%s", fw.tr_cpp))
       $LDFLAGS << " " << opt
       true