1179251 - Add a way to set backend config variables from moz.build

Status: NEW

(Firefox Build System :: General, defect)

Description

[(not currently active) Ted Mielczarek]

We should add a way to set backend variables (make variables currently) directly from moz.build. The primary motivation here is bug 1164937--all the package naming stuff is in package-name.mk, so we can't do nice things using them during moz.build processing.

From that bug, my first inclination was something like:
BACKEND_VARIABLES['MOZ_PKG_PLATFORM'] = '{TARGET_OS}-{TARGET_CPU}'.format(CONFIG)

...but we could also consider making it allowable to add entries to the CONFIG dict, so simply:
CONFIG['MOZ_PKG_PLATFORM'] = '{TARGET_OS}-{TARGET_CPU}'.format(CONFIG)

If we did that we'd probably want to restrict it to add-only, rejecting attempts to overwrite existing values.

Comment 1

[(not currently active) Ted Mielczarek]

Alternately, we might just layer this on top of the configure.py work, effectively putting it in configure, but without the pain that that currently involves.