tree ddb07422dff2e413f4761eaa6dbc22be5ea966e9
parent 8673b5b959def87c0f3f5922b1eea430b1215b62
author Colin Cross <ccross@android.com> 1518732746 -0800
committer Colin Cross <ccross@android.com> 1520038551 -0800

add a library to report build numbers without causing rebuilds

Allow native modules to specify use_version_lib, which will make
an android::build::GetBuildNumber() function available.  For host
builds, the function will return the build number at the time that
the module was linked.  For device modules it will return the
value of the ro.build.version.incremental property.

Bug: 71719137
Test: build_version_test
Test: m build_version_test && touch build/make/core/Makefile build/soong/cc/libbuildversion/tests/build_version_test.cpp && m build_version_test shows different build numbers for binary and library tests.
Change-Id: I6f7d40b7574bb8206866c4e39bad9c710c796e32