[automerger skipped] Update Security String to 2021-09-01 am: 639164b255 am: 996d1d3a4f am: abecfaa90f am: 28bb26cec7 -s ours am: 76530937da -s ours

am skip reason: Merged-In Icea699ec7f82744ff0a6dca90068b2737129778a with SHA-1 cfd4896dc2 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/15123745

Change-Id: I68488fe5ebaa9ff601537e229d62aaa2c4497ab3
tree: a442d60bf4062c3dd448d50692688ba9c5072277
  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For an outdated reference on Android.mk files, see build-system.html.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.