>> Collected issus and workarounds: http://en.gentoo-wiki.com/wiki/Prefix/Cygwin
>
> To help you a bit, I added a cygwin profile and CHOST detection support
> to bootstrap-prefix.sh.  Starting from tomorrow, latest_tree should have
> the profile for you.

During initial bootstrapping I still have to add the profiles tree
manually as the initial profile is from early summer.

    See: http://en.gentoo-wiki.com/wiki/Prefix/Cygwin#Profile_setup

Now I  got to the point "emerge --sync" and the cygwin profile comes
finally in and overwrites my manual made make.defaults. It brings in
the new KEYWORD ~x86-cygwin.

This results in the error message "!!! INVALID ACCEPT_KEYWORDS:
~x86-cygwin". As a first workaround I disabled it again in make.conf
to use ~x86-linux again.

    See: http://en.gentoo-wiki.com/wiki/Prefix/Cygwin#overwrite_make.defaults_by_make.conf

I assume you have added it so that I should use it. Should I do
somesthing special here or go on with ~x86-linux?

I guess the path is to use them in parallel and add the ~x86-cygwin
keyword step by step the ebuilds, right?

Al