Limit the compilers used to gcc and clang. Clang has not been tested.
Users with MSVC install does not need to remove now.
Force the os.sep path to the standard '\\' on Windows. The MSYS2 python
sets it to '/' for internal project reasons. Doing this does cause waf
problems when running configure so only do this for the build target.
Closes#2583.
Installing PYO and PYC does not work so disable this. Move the
Python check to the top level and have a single place.
Fix the install paths a revert the 'from . import' changes. This
is resolved by installing into the correct paths.
This is a first pass at cleaning up the support. To use:
$ waf configure --prefix=$HOME/development/rtems/4.11
$ waf build install
Start GDB and break at Init:
(gdb) py import rtems
(gdb) rtems task
will list the classic API tasks.
