Add support to build MinGW tools using Cygwin. This is a Canadian cross
build.
Do not expand the directives when parsing a configuration file. Hold
in the package object the text as read from the configuration file. Still
parse the logic but leave the macros. This allows a configuration to be
varied when the build happens. The Canadian cross uses this to build a
build compiler used to build a Cxc runtime.
Add Cxc support to the build module. In the defaults add rm and rmfile
macros, add Cxc paths and pre-build script code.
In the setbuilder check for a Cxc build and if so and the package
allow Cxc build the build host version then the host target
version.
Add cygiwn support to the defaults processing and to the Windows module.
By default the Source Builder now directly installs in the prefix and
does not create tar files. You need to supply options to create build
set level tar files and/or package level tar files.
Remove the need to add the --force option. Also revert the force option
back to the --force from --no-force and leave it so the user can
bypass the host check of various packages.
A build set can invoke another build set. This allows an 'all'
type build set that builds all the RTEMS archs.
Change the get config call to return a map of paths and files.
