configure.in: Info.plist workaround

* configure.in: workaround for Info.plist to get rid of `dsymutil`
  crash by wrong files in parent directories.
  [ruby-core:62594] [Bug #9840]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46032 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Wed May 21 11:42:31 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in: workaround for Info.plist to get rid of `dsymutil`
+	  crash by wrong files in parent directories.
+	  [ruby-core:62594] [Bug #9840]
+
 Tue May 20 20:57:34 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* test/ruby/test_dir.rb (test_glob): added testcase of double

configure.in

@@ -691,13 +691,22 @@ RUBY_WERROR_FLAG([
 	]
     )
     AC_MSG_CHECKING([whether LDFLAGS is valid])
+    {
+	mkdir tmp.$$.try_link &&
+	cd tmp.$$.try_link &&
+	cp ../confdefs.h . &&
+	echo '<?xml?><plist><dict><key>CFBundleIdentifier</key><string></string></dict></plist>' > Info.plist &&
+	:
+    } || AC_MSG_ERROR([faild to make temporary directory])
     AC_TRY_LINK([], [],
 	[AC_MSG_RESULT(yes)],
 	[
+	cd .. && rm -fr tmp.$$.try_link
 	AC_MSG_RESULT(no)
 	AC_MSG_ERROR([something wrong with LDFLAGS="$LDFLAGS"])
 	]
     )
+    cd .. && rm -fr tmp.$$.try_link
 ])
 
 AC_DEFUN(RUBY_TRY_CFLAGS, [