tree 9448b8dc11808084bf66984a6700b99001431114
parent 9615e0ddacafcc728ff432fce61eaa0a1049880e
author Jooyung Han <jooyung@google.com> 1572294596 +0900
committer Jooyung Han <jooyung@google.com> 1572295623 +0900

Add linker config variable: VNDK_APEX_VER

With VNDK APEX, the path for VNDK libs has been changed
from /system/lib/vndk-VER to /apex/com.android.vndk.vVER/lib

In most cases, vndk version can be substituted when generating
ld.config.txt by linkerconfig.

But, ld.config.txt files in APEX packages still rely on runtime substitution.
Specifically, com.android.media.swcodec is using VNDK_VER variable.
Moreover, it cannot migrate to a new location since it should run on
older version of system due to APEX requirements.

For backward compatibility, instead of changing the value of old
variable, a new variable is added.

- VNDK_VER : "-" prefixed vndk version, used for older path
            (e.g. /system/lib/vndk-sp-29)
- VNDK_APEX_VER : "v" prefixed vndk versions.
            (e.g. /apex/com.android.vndk.v29/lib)

Test: add a vendor binary to /apex/com.android.media.swcodec/bin
      which opens /system/lib/vndk-sp{VNDK_VER}/hw/android.hidl.memory@1.0-impl.so
      via android_load_sphal_library()
Bug: 142912195

Change-Id: I3dfb3c1068cff00d5b63e92d51da6c4af00d264e