File libprelude-ruby-swig.patch of Package libprelude

--- bindings/ruby/Prelude.cxx	2016-04-22 23:26:58.270000362 +0200
+++ bindings/ruby/Prelude.cxx	2016-04-28 11:37:20.826666666 +0200
@@ -867,7 +867,17 @@
 #define  SWIG_NullReferenceError   -13
 
 
-
+#ifdef __cplusplus
+// Work around C++ incompatibility in Ruby 2.3.0 headers:
+// https://bugs.ruby-lang.org/issues/11962
+# include <ruby/config.h>
+# ifdef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
+#  undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
+# endif
+# ifdef HAVE_BUILTIN___BUILTIN_TYPES_COMPATIBLE_P
+#  undef HAVE_BUILTIN___BUILTIN_TYPES_COMPATIBLE_P
+# endif
+#endif
 #include <ruby.h>
 
 /* Ruby 1.9.1 has a "memoisation optimisation" when compiling with GCC which
@@ -2596,6 +2606,17 @@
 
 extern "C" {
 
+#ifdef __cplusplus
+// Work around C++ incompatibility in Ruby 2.3.0 headers:
+// https://bugs.ruby-lang.org/issues/11962
+# include <ruby/config.h>
+# ifdef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
+#  undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
+# endif
+# ifdef HAVE_BUILTIN___BUILTIN_TYPES_COMPATIBLE_P
+#  undef HAVE_BUILTIN___BUILTIN_TYPES_COMPATIBLE_P
+# endif
+#endif
 #include <ruby.h>
 /*
  * cannot put libmissing into the include path, as it will trigger