mruby/mruby — pull request #1693 by cremno (2014-02-11 23:09:10+00:00)
Title: mruby-math: remove Cygwin compatibility macros

nan:
The first non-test release of Cygwin 1.5.x was over a decade ago:

log/log10:
This workaround is not needed anymore (1.2.6.1, 1.3 - both over 6 years ago):