Add hints for bootstrap pkgsrc on Cygwin.


(obache)

$NetBSD: README.Cygwin,v 1.1 2013/02/22 13:59:47 obache Exp $

Please read the general README file as well.

==========================================================================

pkgsrc supports both gcc (GNU Compiler Collection) and clang (C Language Family
Frontend for LLVM). gcc is the default.

To bootstrap using clang:

	env CC=clang ./bootstrap --compiler=clang

==========================================================================

The su(1) command has been in Cygwin distribution, but it has never worked.
Unless you bootstrap pkgsrc with the --unprivileged option, workaround is:

  * Right click "Cygwin Terminal" in your Start Menu, then pick
    "Run as administrator".