android_libcpp_shared` 0.2.0 fails on NDK 28 for arm64-v8a

[chillbrodev]

android_libcpp_shared 0.2.0 fails on NDK 28 for arm64-v8a

Package: package:android_libcpp_shared 0.2.0
Repo: dart-lang/native
Flutter: 3.44.2
NDK: 28.2.13676358
Host: macOS with Apple Silicon M1 Pro
Target ABI: arm64-v8a (Pixel 6a)

Error:

Hook.build hook of package:android_libcpp_shared has invalid output
- Code asset "package:android_libcpp_shared/libc++_shared.so" file
  (/Users/.../ndk/28.2.13676358/toolchains/llvm/prebuilt/darwin-x86_64//sysroot/usr/lib/aarch64-linux-android/libc++_shared.so)
  does not exist as a file.

Root cause:

NDK 28 changed the layout for arm64. There are two issues:

1. Wrong path — missing API-level subdirectory.
The package looks at:

sysroot/usr/lib/aarch64-linux-android/libc++_shared.so

But in NDK 28 the file lives at:

sysroot/usr/lib/aarch64-linux-android/24/libc++.so

2. Wrong filename.
For arm64 in NDK 28 the library is named libc++.so, not libc++_shared.so.

Verification:

# Top-level aarch64 directory — no libc++_shared.so
ls $NDK_HOME/toolchains/llvm/prebuilt/darwin-x86_64/sysroot/usr/lib/aarch64-linux-android/
# libc++_static.a  libc++abi.a  libc++experimental.a  libc.a  ...
# No libc++_shared.so

# API-level subdirectory — libc++.so present under a different name
ls $NDK_HOME/toolchains/llvm/prebuilt/darwin-x86_64/sysroot/usr/lib/aarch64-linux-android/24/
# libc++.so  libc.so  libm.so  libdl.so  ...

# Other ABIs still have libc++_shared.so at the top level (not affected)
find $NDK_HOME -name "libc++_shared.so"
# arm-linux-androideabi, x86_64-linux-android, i686-linux-android, riscv64-linux-android
# Missing: aarch64-linux-android

Additional behaviour:
The build succeeds on the first run because hook output is cached in .dart_tool/hooks_runner/. Subsequent builds (or after flutter clean) fail immediately because the cached file path is validated and the file does not exist. This makes the bug appear intermittent.

[kattaliraees]

Same issue

Hook.build hook of package:android_libcpp_shared has invalid output
- Code asset "package:android_libcpp_shared/libc++_shared.so" file (/Users/hostname/Library/Android/sdk/ndk/28.2.13676358/toolchains/llvm/prebuilt/darwin-x86_64//sysroot/usr/lib/arm-linux-androideabi/libc++_shared.so) does not exist as a file.

~ find $ANDROID_HOME/ndk/28.2.13676358 -name "libc++_shared.so" 2>/dev/null
/Users/hostname/Library/Android/sdk/ndk/28.2.13676358/toolchains/llvm/prebuilt/darwin-x86_64/sysroot/usr/lib/aarch64-linux-android/libc++_shared.so
/Users/hostname/Library/Android/sdk/ndk/28.2.13676358/toolchains/llvm/prebuilt/darwin-x86_64/sysroot/usr/lib/i686-linux-android/libc++_shared.so
/Users/hostname/Library/Android/sdk/ndk/28.2.13676358/toolchains/llvm/prebuilt/darwin-x86_64/sysroot/usr/lib/riscv64-linux-android/libc++_shared.so

had to do this for the build to succeed

dependency_overrides:
  android_libcpp_shared: 0.1.1

[chillbrodev]

Good call, I ended up building my C++ library with ANDROID_STL=c++_static instead but good to know you can downgrade and have it work. Thanks for that

Same issue

Hook.build hook of package:android_libcpp_shared has invalid output

• Code asset "package:android_libcpp_shared/libc++_shared.so" file (/Users/hostname/Library/Android/sdk/ndk/28.2.13676358/toolchains/llvm/prebuilt/darwin-x86_64//sysroot/usr/lib/arm-linux-androideabi/libc++_shared.so) does not exist as a file.

~ find $ANDROID_HOME/ndk/28.2.13676358 -name "libc++_shared.so" 2>/dev/null
/Users/hostname/Library/Android/sdk/ndk/28.2.13676358/toolchains/llvm/prebuilt/darwin-x86_64/sysroot/usr/lib/aarch64-linux-android/libc++_shared.so
/Users/hostname/Library/Android/sdk/ndk/28.2.13676358/toolchains/llvm/prebuilt/darwin-x86_64/sysroot/usr/lib/i686-linux-android/libc++_shared.so
/Users/hostname/Library/Android/sdk/ndk/28.2.13676358/toolchains/llvm/prebuilt/darwin-x86_64/sysroot/usr/lib/riscv64-linux-android/libc++_shared.so
had to do this for the build to succeed

dependency_overrides:
android_libcpp_shared: 0.1.1