Refactor *-select-bitness-of-required-modules

* Streamline required module bitness resolution

If a module is for cross host OS, the required modules are also for that
OS.
Otherwise if the requirer module is native and the required module is
shared library or native test, then the required module resolves to the
same bitness.
Otherwise the required module resolves to both variants, if they exist.

* Factor out the common logic and merge
  <target|host|host-cross>-select-bitness-of-required-modules

This lays the road for follow-up changes to add bitness suffix support.
This slightly reduces readibility. To make up for the loss, the
bitness-resolving logic is easier to maintain since we don't have
multiple copies of *-select-bitness-of-required-modules.

Bug: 155869107
Test: check the diff of product_target_FILES and product_host_FILES
Test: check the diff of ALL_MODULES.*.REQUIRED_FROM_(TARGET|HOST)
Change-Id: Ib2f4b548535e983d621dad71cb920101111140f2
1 file changed
tree: f84144468f11a80789d8b5070204d028b6e515fa
  1. common/
  2. core/
  3. packaging/
  4. target/
  5. tests/
  6. tools/
  7. .gitignore
  8. buildspec.mk.default
  9. Changes.md
  10. CleanSpec.mk
  11. Deprecation.md
  12. envsetup.sh
  13. help.sh
  14. navbar.md
  15. OWNERS
  16. rbesetup.sh
  17. README.md
  18. tapasHelp.sh
  19. Usage.txt
README.md

Android Make Build System

This is the Makefile-based portion of the Android Build System.

For documentation on how to run a build, see Usage.txt

For a list of behavioral changes useful for Android.mk writers see Changes.md

For an outdated reference on Android.mk files, see build-system.html. Our Android.mk files look similar, but are entirely different from the Android.mk files used by the NDK build system. When searching for documentation elsewhere, ensure that it is for the platform build system -- most are not.

This Makefile-based system is in the process of being replaced with Soong, a new build system written in Go. During the transition, all of these makefiles are read by Kati, and generate a ninja file instead of being executed directly. That's combined with a ninja file read by Soong so that the build graph of the two systems can be combined and run as one.