Android build fails with ld: error: undefined symbol: aligned_alloc

[BartlomiejLewandowski]

Prerequisites

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Expected Behavior

Compile for android.

Current Behavior

An error message when running make

[100%] Linking CXX executable ../../bin/main
ld: error: undefined symbol: aligned_alloc
>>> referenced by ggml.c:3067 (/Users/blewandowski/repositories/llama.cpp/ggml.c:3067)
>>>               ggml.c.o:(ggml_init) in archive ../../libllama.a
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [bin/main] Error 1
make[2]: *** [examples/main/CMakeFiles/main.dir/all] Error 2
make[1]: *** [examples/main/CMakeFiles/main.dir/rule] Error 2
make: *** [main] Error 2

Environment and Context

Mac OSX M2 Air

Installed latest NDK, exported as NDK=/Users/blewandowski/Library/Android/sdk/ndk/25.2.9519653 then followed instructions in the README

$ mkdir build-android $ cd build-android $ export NDK=<your_ndk_directory> $ cmake -DCMAKE_TOOLCHAIN_FILE=$NDK/build/cmake/android.toolchain.cmake -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=android-23 -DCMAKE_C_FLAGS=-march=armv8.4a+dotprod .. $ make

[prusnak]

We need to pass -std=c11 to compiler. Not sure how that is done on Android.

[BartlomiejLewandowski]

I'd like to note that this is compiled on my Mac, for a different architecture and system => Android.

[prusnak]

Try if using this helps:

-DCMAKE_C_FLAGS="-std=c11 -march=armv8.4a+dotprod"

[BartlomiejLewandowski]

@prusnak new command is

cmake -DCMAKE_TOOLCHAIN_FILE=$NDK/build/cmake/android.toolchain.cmake -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=android-23 -DCMAKE_C_FLAGS="-std=c11 -march=armv8.4a+dotprod" ..

but the same error is shown

[prusnak]

Try building the master branch now - it contains https://github.com/ggerganov/llama.cpp/commit/aa485cee334e84437e21681c14b6f80b65876d8b which replaces aligned_alloc with posix_memalign.

[BartlomiejLewandowski]

It looks like the code compiles now, I'll verify if I can get it working on my phone now. Cheers!

On Sat, Apr 15, 2023 at 11:36 PM Pavol Rusnak @.***> wrote:

Try building the master branch now - it contains aa485ce https://github.com/ggerganov/llama.cpp/commit/aa485cee334e84437e21681c14b6f80b65876d8b which replaces aligned_alloc with posix_memalign.

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