GCC compiler flags that control unused warnings include:
-Wunused-function
-Wunused-label
-Wunused-parameter
-Wunused-value
-Wunused-variable
-Wunused (=all of the above)
Disable for a single file or section of code
//Deal with "error: label defined but not used [-Werror=unused-label]" from compiler
//#pragma GCC diagnostic push
//#pragma GCC diagnostic ignored "-Wunused-label"
//My code...
//#pragma GCC diagnostic pop
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