Checklist

Check that you have the GNU C Compiler installed by typing gcc --version into a terminal.
If you don't have the linter package installed, either update to the latest version of linter-gcc or install linter directly with apm install linter.
Ensure that you are using a valid grammar - either C/C++/C++14
Ensure that you have read all the relevant information in the wiki, particularly the Common Issues page.

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