Rémi Bernon 3273dc2de0 build: Introduce single container build target. ...

The intention is to batch all container invocations instead of
instanciating one for every rule that needs to run within a container.

This keeps track of build dependencies using a .any-build timestamp file
and define a CONTAINER=1 variable when make is running within the
container.

When running within the container, only "configure" and "build" targets
are active, all the other targets are no-op. When make is run outside
of the container, it's the opposite, except for the "build" targets
which all depend on this .any-build timestamp file to trigger the
container build execution.

The targets dependency graph is still complete, so "source" targets
will always all be executed before the container, and configure steps
will optionally run if the generated files are missing. When source
change is detected, only the build rules are executed again, trusting
each build system to decide if configure should be run again or not.

2021-03-31 14:08:10 -05:00

..

makefile_base.mak

build: Introduce single container build target.

2021-03-31 14:08:10 -05:00