Instead of a dictionary of dictionaries, have a dictionary of
ConfigSets. Using ConfigSet have two benefits: (1) allow easily copying
values from other, (2) have syntax for specifying the keys directly as
attributes.
With this change now it's easier to specify minlure without
repetition. New boards can override a value, append or prepend depending
on the need.
DEFINES attribute is treated as a dictionary instead of a list, so
that's easier to override values (at expense of ordering). When reading
the board environment, the code converts back to a list.
The board configuration is now stored in a separate file, there's also a
function to get the boards names.
Currently, an associative array variable waf_supported_boards is used to
trigger waf build only the currently supported boards. After the transition to
the new build system is done, that variable can be removed.
We're just building for now - there is a current issue related to the rotation
for solo, and it turns out that the first unit test added as an example is for
vector rotations. After that is solved we can use waf check, so that unit tests
are run as well.
The command will be used to allow travis script to know which boards are
already supported by the waf build system. This is useful while the transition
to the new build system is on going. The command can be removed when the
transition is done and it's not used anywhere besides travis script.
It was implemented in such a way that gtest is required only if the user wants
to build and run tests. Initially we're considering all tests should be gtests.
We can change that assumption in the future if necessary.
We're currently using the tests standard error for reporting tests. We can add
TAP later to integrate with other tools.
Additionally, this patch simplifies the exclude patterns passed to
collect_dirs_to_recurse.
