tatsuhiro-t/aria2 — pull request #53 by nmaier (2013-03-01 18:24:42+00:00)
Title: Check for sys/signal.h and/or signal.h

mingw-w64 does not actually have sys/signal.h, while OSX currently has a
broken signal.h
Better check the presence of both and use sys/signal.h if present, else
signal.h