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ref: 4f126b37d066539800a34d84296f9f3679fe812a
parent: 0daec91683098b7293e27b78063d0e7dcfd34a49
parent: 1b4187e51f76dea56924b610c98840f0828dd9e0
author: Antonio Niño Díaz <antonio_nd@outlook.com>
date: Tue Apr 3 15:56:34 EDT 2018

Merge pull request #261 from warnings

Enable a lot of GCC warnings and cleanup Makefile and compiler macros

Most of the warnings in the GCC documentation have been enabled. As the
build system was using `-Werror`, this made the new builds very
susceptible to any minor change in the compiler. To fix that, this
option has been removed from the default Makefile target and it is only
used when the code is compiled through `make develop`.

The file `stdnoreturn.h` has been modified to remove support for
compilers that aren't actually tested. It now has defines for
`__attribute__((unused))` and it has been renamed to `helpers.h`.

Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>