Patch to compile ruby 1.9.3 with Clang on Mac OSX 10.8 (https://bugs.ruby-lang.org/issues/7830)

disable-werror.patch

diff --git a/configure.in b/configure.in
index 732dd5d..8f5b364 100644
--- a/configure.in
+++ b/configure.in
@@ -172,6 +172,7 @@ RUBY_PROGRAM_VERSION=`sed -n 's/^#define RUBY_VERSION "\(.*\)"/\1/p' $srcdir/ver
 AC_SUBST(RUBY_PROGRAM_VERSION)
 RUBY_RELEASE_DATE=`sed -n 's/^#define RUBY_RELEASE_DATE "\(.*\)"/\1/p' $srcdir/version.h`
 AC_SUBST(RUBY_RELEASE_DATE)
+RUBY_PATCHLEVEL=`sed -n 's/^#define RUBY_PATCHLEVEL //p' $srcdir/version.h`
 AC_DEFINE(CANONICALIZATION_FOR_MATHN)
 dnl checks for alternative programs
 AC_CANONICAL_BUILD
@@ -615,9 +616,16 @@ AC_DEFUN(RUBY_TRY_LDFLAGS, [
     save_LDFLAGS=
 ])
 
+AC_ARG_ENABLE(werror,
+  AS_HELP_STRING([--disable-werror],
+		       [don't make warnings into errors even if a compiler support -Werror feature.]),
+	[particular_werror_flags=$enableval], [particular_werror_flags=])
+
 rb_cv_warnflags="$warnflags"
 if test "$GCC:${warnflags+set}:no" = yes::no; then
-    particular_werror_flags=yes
+    if test -z "${particular_werror_flags}"; then
+        AS_CASE($RUBY_PATCHLEVEL, [-*], [particular_werror_flags=yes], [particular_werror_flags=no])
+    fi
     for wflag in -Wno-unused-parameter -Wno-parentheses -Wno-long-long \
 		 -Wno-missing-field-initializers \
 		 -Wunused-variable \