Currently these checks are only activated if a
Package-Version header is present in the file, and checks center on
the validity of the data in that header.
You'll need Emacs 24 for
flycheck, so the recommended way to get
flycheck-package is as a package from the MELPA
repository. The version of
flycheck-package there will always be
up-to-date. There are also packages in MELPA Stable, which
track the latest numbered tag.
If you insist on doing things the hard way, first ensure
package-lint are installed, then download this code and add the
directory to your Emacs
Then, in your
(eval-after-load 'flycheck '(flycheck-package-setup))
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.
See COPYING for details.