testing if it's cygwin

[Schaible, Joerg]

Hi Kris ans Karsten,

> > what would be the recommended way of testing (in a shell 
> > script file, or a
> > Makefile) if it's being run on CYGWIN?
> > At the moment, I do
> > 	uname
> > and test on CYGWIN-NT4.0, but that seems like a bad idea, 
> as I want to
> > support W9? or W2000 as well. Also, it relies on the 
> > existence of uname of
> > course...

I use 

if ( test `uname | grep -ic Cygwin` -gt 0 ); then
	echo "Cygwin"
fi

> I check the environment variable OSTYPE for "cygwin" in my makefiles.
> However, I don't know if it's reliable.

It's not. Changed from cygwin to cygwin32 and back to cygwin.

Greetings,
Jörg

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