aconfig: update c/c++ codegen

1, Current codegen would still include an empty flag value cache even if
there are no read write flags. This is important as the flag value cache
is a std::vector. Thus adding this cache would automatically pull in
libc++ dependency which we should not.

2, There lacks of c/c++ codegen unit tests to lock down the generated
code when a flag package contains only read only flags. It should not
include server_configurable_flags header. And it should not include the
flag cache.

Bug: b/316614694
Test: atest aconfig.test
Change-Id: Iee4366672932ee507694f5fc73b526c66fcf0e9b
6 files changed
tree: 12e02e0b2e2cfdbc3e9c2c5c169fca347a0bf0a2
  1. common/
  2. core/
  3. packaging/
  4. target/
  5. tests/
  6. tools/
  7. .gitignore
  8. banchanHelp.sh
  9. buildspec.mk.default
  10. Changes.md
  11. CleanSpec.mk
  12. cogsetup.sh
  13. Deprecation.md
  14. envsetup.sh
  15. help.sh
  16. METADATA
  17. navbar.md
  18. OWNERS
  19. PREUPLOAD.cfg
  20. rbesetup.sh
  21. README.md
  22. shell_utils.sh
  23. tapasHelp.sh
  24. 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For an outdated reference on Android.mk files, see build-system.html.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.