forked from openkylin/platform_build
86 lines
3.5 KiB
Plaintext
86 lines
3.5 KiB
Plaintext
|
Android build system usage:
|
||
|
|
|
||
|
|
m [-j] [<targets>] [<variable>=<value>...]
|
||
|
|
|
||
|
|
|
||
|
|
Ways to specify what to build:
|
||
|
|
The common way to specify what to build is to set that information in the
|
||
|
|
environment via:
|
||
|
|
|
||
|
|
# Set up the shell environment.
|
||
|
|
source build/envsetup.sh # Run "hmm" after sourcing for more info
|
||
|
|
# Select the device and variant to target. If no argument is given, it
|
||
|
|
# will list choices and prompt.
|
||
|
|
lunch [<product>-<variant>] # Selects the device and variant to target.
|
||
|
|
# Invoke the configured build.
|
||
|
|
m [<options>] [<targets>] [<variable>=<value>...]
|
||
|
|
|
||
|
|
<product> is the device that the created image is intended to be run on.
|
||
|
|
This is saved in the shell environment as $TARGET_PRODUCT by `lunch`.
|
||
|
|
<variant> is one of "user", "userdebug", or "eng", and controls the
|
||
|
|
amount of debugging to be added into the generated image.
|
||
|
|
This gets saved in the shell environment as $TARGET_BUILD_VARIANT by
|
||
|
|
`lunch`.
|
||
|
|
|
||
|
|
Each of <options>, <targets>, and <variable>=<value> is optional.
|
||
|
|
If no targets are specified, the build system will build the images
|
||
|
|
for the configured product and variant.
|
||
|
|
|
||
|
|
An alternative to setting $TARGET_PRODUCT and $TARGET_BUILD_VARIANT,
|
||
|
|
which you may see in build servers, is to execute:
|
||
|
|
|
||
|
|
make PRODUCT-<product>-<variant>
|
||
|
|
|
||
|
|
|
||
|
|
A target may be a file path. For example, out/host/linux-x86/bin/adb .
|
||
|
|
Note that when giving a relative file path as a target, that path is
|
||
|
|
interpreted relative to the root of the source tree (rather than relative
|
||
|
|
to the current working directory).
|
||
|
|
|
||
|
|
A target may also be any other target defined within a Makefile. Run
|
||
|
|
`m help` to view the names of some common targets.
|
||
|
|
|
||
|
|
To view the modules and targets defined in a particular directory, look for:
|
||
|
|
files named *.mk (most commonly Android.mk)
|
||
|
|
these files are defined in Make syntax
|
||
|
|
files named Android.bp
|
||
|
|
these files are defined in Blueprint syntax
|
||
|
|
|
||
|
|
For now, the full (extremely large) compiled list of targets can be found
|
||
|
|
(after running the build once), split among these two files:
|
||
|
|
|
||
|
|
${OUT}/build-<product>*.ninja
|
||
|
|
${OUT}/soong/build.ninja
|
||
|
|
|
||
|
|
If you find yourself interacting with these files, you are encouraged to
|
||
|
|
provide a more convenient tool for browsing targets, and to mention the
|
||
|
|
tool here.
|
||
|
|
|
||
|
|
Targets that adjust an existing build:
|
||
|
|
showcommands Display the individual commands run to implement
|
||
|
|
the build
|
||
|
|
dist Copy into ${DIST_DIR} the portion of the build
|
||
|
|
that must be distributed
|
||
|
|
|
||
|
|
Flags
|
||
|
|
-j <N> Run <N> processes at once
|
||
|
|
-j Autodetect the number of processes to run at once,
|
||
|
|
and run that many
|
||
|
|
|
||
|
|
Variables
|
||
|
|
Variables can either be set in the surrounding shell environment or can be
|
||
|
|
passed as command-line arguments. For example:
|
||
|
|
export I_AM_A_SHELL_VAR=1
|
||
|
|
I_AM_ANOTHER_SHELL_VAR=2 make droid I_AM_A_MAKE_VAR=3
|
||
|
|
Here are some common variables and their meanings:
|
||
|
|
TARGET_PRODUCT The <product> to build # as described above
|
||
|
|
TARGET_BUILD_VARIANT The <variant> to build # as described above
|
||
|
|
DIST_DIR The directory in which to place the distribution
|
||
|
|
artifacts.
|
||
|
|
OUT_DIR The directory in which to place non-distribution
|
||
|
|
artifacts.
|
||
|
|
|
||
|
|
There is not yet known a convenient method by which to discover the full
|
||
|
|
list of supported variables. Please mention it here when there is.
|
||
|
|
|