vancegroup/gmtl — pull request #1 by badgerman (2014-05-15 16:42:23+00:00)
Title: Use the correct DEBUG macro for asserts

_DEBUG is a Visual C++-ism. The correct macro to use to determine Debug vs. Release builds is NDEBUG.
See also: https://stackoverflow.com/questions/2290509/debug-vs-ndebug/2290616

We are using gmtl on clang and g++, and were wondering why these assertions were not getting triggered, until we found that problem.