* lib/mkmf.rb (try_config): Fix to not replace $LDFLAGS with $libs

(1.9.3 behavior) [ruby-core:55752] [Bug #8595]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41734 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Tue Jul  2 11:14:36 2013  Shota Fukumori  <sorah@cookpad.com>
+
+	* lib/mkmf.rb (try_config): Fix to not replace $LDFLAGS with $libs
+          (1.9.3 behavior) [ruby-core:55752] [Bug #8595]
+
 Tue Jul  2 00:39:59 2013  Tanaka Akira  <akr@fsij.org>
 
 	* ext/socket/ipsocket.c (init_inetsock_internal): Don't try mismached

lib/mkmf.rb

@@ -1747,6 +1747,7 @@ SRC
       # default to package specific config command, as a last resort.
       get = proc {|opt| `#{pkgconfig} --#{opt}`.strip}
     end
+    orig_ldflags = $LDFLAGS
     if get and option
       get[option]
     elsif get and try_ldflags(ldflags = get['libs'])
@@ -1754,7 +1755,7 @@ SRC
       libs = get['libs-only-l']
       ldflags = (Shellwords.shellwords(ldflags) - Shellwords.shellwords(libs)).quote.join(" ")
       $CFLAGS += " " << cflags
-      $LDFLAGS += " " << ldflags
+      $LDFLAGS = [orig_ldflags, ldflags].join(' ')
       $libs += " " << libs
       Logging::message "package configuration for %s\n", pkg
       Logging::message "cflags: %s\nldflags: %s\nlibs: %s\n\n",