flycheck/flycheck — pull request #543 by stephenjlewis (2014-12-13 19:33:52+00:00)
Title: Add -pedantic, -pendantic-errors to c/c++ checkers

The -pedantic compiler flags throws warning on the use of any language
extensions, and is used when strict ISO-compliance is desired.

-pedantic-errors is equivilient, but throws errors rather than warnings.