--- configure.orig	2014-12-25 08:44:47.000000000 +0000
+++ configure
@@ -21259,7 +21267,7 @@ $as_echo "$rb_cv_dlopen" >&6; }
 	  "-undefined dynamic_lookup" \
 	  "-multiply_defined suppress" \
 	  ; do
-	  test "x${linker_flag}" = x || flag="${linker_flag}${flag// /,}"
+	  test "x${linker_flag}" = x || flag="${linker_flag}$(echo ${flags} | sed -e 's| |,|g')"
 
     save_LDFLAGS="$LDFLAGS"
     LDFLAGS="$LDFLAGS $flag"