[BUG] sysroot headers missing since r22?

[tmm1]

$ ls -d /usr/local/share/android-sdk/ndk/21.3.6528147/sysroot
/usr/local/share/android-sdk/ndk/21.3.6528147/sysroot

$ ls -d /usr/local/share/android-sdk/ndk/22.0.7026061/sysroot
ls: cannot access '/usr/local/share/android-sdk/ndk/22.0.7026061/sysroot': No such file or directory

[rprichard]

The sysroot moved to <NDK>/toolchains/llvm/prebuilt/<host-tag>/sysroot starting with NDK r19. r22 removed the deprecated sysroot and platforms directories from the top-level of the NDK.

• https://android.googlesource.com/platform/ndk/+/master/docs/BuildSystemMaintainers.md#sysroot
• https://github.com/android/ndk/wiki/Changelog-r19 (specifically, issue make all toolchains standalone toolchains #780)
• https://github.com/android/ndk/wiki/Changelog-r22

By using the appropriate driver (e.g. toolchains/llvm/prebuilt/<host-tag>/bin/aarch64-linux-android21-clang), it shouldn't be necessary to do things like pass --sysroot=, include the STL header directories, etc. The driver should handle all that stuff implicitly.

[tmm1]

Thank you for the explanation

[DanAlbert]

Thank you for the explanation

The changelogs are helpful for things like this :) I know Studio doesn't show them and that's frustrating, but we publish them on our wiki and they always include announcements for things like this.