[mathiaspoint]

The language runtime will insert/remove CR for you if you open the file in text mode on Windows. You'd be surprised how much stuff cygwin itself actually does for you. If your code isn't too Linux specific try building it under mingw instead and you can see what's actually going on.

[Borg3]

Cygwin does NOTHING under the hood, because I asked it to do nothing. I am aware of text mode of open() under Windows/Mingw. Im also aware of possibility to do CRLF <-> LF translation under cygwin. I never liked it, and I went to LF only quickly. Hence, I use it everywhere and live is easier :)