tree 5989bdf679b74cb94c04f4558dfd7a871cc70c25
parent 8c0966a12f3ab946e6e91ce20e581953d36434c1
author Daniel Mentz <danielmentz@google.com> 1629230830 -0700
committer Daniel Mentz <danielmentz@google.com> 1631307952 +0000

build.sh: Allow building external modules in parallel

Allow external modules to be built in parallel by letting projects
provide their own makefile for building external modules.

Currently, build.sh employs a simple for loop to build and install
modules listed in EXT_MODULES. Unfortunately, this prevents parallel
compilation across modules and results in poor utilization of build
machines with multiple CPUs.

If EXT_MODULES_MAKEFILE is set to the file path of a custom makefile,
build.sh will invoke make on it with all the necessary parameters that
are needed to build and install kernel modules.

Signed-off-by: Daniel Mentz <danielmentz@google.com>
Change-Id: I357a524a831cf5a0a522fee66bc9c6afd249f1f1
(cherry picked from commit e2f698e689fcab16b15831a0cf6f5320cf30f0f6)