waf: readme: clarify explanation on program groups

The necessity for that was pointed out in the PR #3841 ("waf: readme: update
information regarding groups" -
https://github.com/ArduPilot/ardupilot/pull/3841).
This commit is contained in:
Gustavo Jose de Sousa 2016-06-14 15:18:10 -03:00 committed by Lucas De Marchi
parent c67b48bcc6
commit 3b7ddbabc0

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@ -63,8 +63,10 @@ waf list
## Program groups ##
Program groups are used to represent a class of programs. They can be used to
build all programs of a certain class without having to specify each program. A
program can belong to more than one group.
build all programs of a certain class without having to specify each program.
It's possible for two groups to overlap, except when both groups are main
groups. In other words, a program can belong to more than one group, but only
to one main group.
There's a special group, called "all", that comprises all programs.