configure.in: revert macro names

* configure.in (FUNC_STDCALL, FUNC_CDECL, FUNC_FASTCALL): set
  macro names explicitly to the old names, which are accidentally
  changed at r54985, for backward compatibilities.
  fiddle also depends on these names to fallback to ANSI names.
  [ruby-core:75494] [Bug #12377]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55015 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Mon May 16 13:28:59 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (FUNC_STDCALL, FUNC_CDECL, FUNC_FASTCALL): set
+	  macro names explicitly to the old names, which are accidentally
+	  changed at r54985, for backward compatibilities.
+	  fiddle also depends on these names to fallback to ANSI names.
+	  [ruby-core:75494] [Bug #12377]
+
 Mon May 16 11:39:02 2016  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
 
 	* lib/xmlrpc.rb, lib/xmlrpc/*, test/xmlrpc: XMLRPC is bundled gem

configure.in

@@ -1815,9 +1815,9 @@ if test "$rb_cv_func_weak" != x; then
 fi
 
 if_i386=${universal_binary+[defined __i386__]}
-RUBY_FUNC_ATTRIBUTE(__stdcall__,  [], [], ${if_i386})
-RUBY_FUNC_ATTRIBUTE(__cdecl__,    [], [], ${if_i386})
-RUBY_FUNC_ATTRIBUTE(__fastcall__, [], [], ${if_i386})
+RUBY_FUNC_ATTRIBUTE(__stdcall__,  FUNC_STDCALL,  rb_cv_func_stdcall,  ${if_i386})
+RUBY_FUNC_ATTRIBUTE(__cdecl__,    FUNC_CDECL,    rb_cv_func_cdecl,    ${if_i386})
+RUBY_FUNC_ATTRIBUTE(__fastcall__, FUNC_FASTCALL, rb_cv_func_fastcall, ${if_i386})
 RUBY_FUNC_ATTRIBUTE(__optimize__("O0"), FUNC_UNOPTIMIZED, rb_cv_func_unoptimized)
 RUBY_FUNC_ATTRIBUTE(__optimize__("-Os","-fomit-frame-pointer"), FUNC_MINIMIZED, rb_cv_func_minimized)
 

test/fiddle/test_handle.rb

@@ -182,5 +182,12 @@ module Fiddle
     def test_no_memory_leak
       assert_no_memory_leak(%w[-W0 -rfiddle.so], '', '100_000.times {Fiddle::Handle.allocate}; GC.start', rss: true)
     end
+
+    if /cygwin|mingw|mswin/ =~ RUBY_PLATFORM
+      def test_fallback_to_ansi
+        k = Fiddle::Handle.new("kernel32.dll")
+        refute_nil(k["GetFileAttributes"])
+      end
+    end
   end
 end if defined?(Fiddle)