mirror of
https://github.com/ggerganov/llama.cpp.git
synced 2024-12-25 02:44:36 +00:00
Update building for Android (#9672)
* docs : clarify building Android on Termux * docs : update building Android on Termux * docs : add cross-compiling for Android * cmake : link dl explicitly for Android
This commit is contained in:
Andrew Minh Nguyen
GitHub
parent
6279dac039
commit
f1af42fa8c
109
docs/android.md
109
docs/android.md
@ -2,55 +2,82 @@
|
||||
# Android
|
||||
|
||||
## Build on Android using Termux
|
||||
[Termux](https://github.com/termux/termux-app#installation) is a method to execute `llama.cpp` on an Android device (no root required).
|
||||
```
|
||||
apt update && apt upgrade -y
|
||||
apt install git make cmake
|
||||
```
|
||||
|
||||
It's recommended to move your model inside the `~/` directory for best performance:
|
||||
```
|
||||
cd storage/downloads
|
||||
mv model.gguf ~/
|
||||
```
|
||||
[Termux](https://termux.dev/en/) is an Android terminal emulator and Linux environment app (no root required). As of writing, Termux is available experimentally in the Google Play Store; otherwise, it may be obtained directly from the project repo or on F-Droid.
|
||||
|
||||
[Get the code](https://github.com/ggerganov/llama.cpp#get-the-code) & [follow the Linux build instructions](https://github.com/ggerganov/llama.cpp#build) to build `llama.cpp`.
|
||||
|
||||
## Building the Project using Android NDK
|
||||
Obtain the [Android NDK](https://developer.android.com/ndk) and then build with CMake.
|
||||
|
||||
Execute the following commands on your computer to avoid downloading the NDK to your mobile. Alternatively, you can also do this in Termux:
|
||||
```
|
||||
$ 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
|
||||
```
|
||||
|
||||
Install [termux](https://github.com/termux/termux-app#installation) on your device and run `termux-setup-storage` to get access to your SD card (if Android 11+ then run the command twice).
|
||||
|
||||
Finally, copy these built `llama` binaries and the model file to your device storage. Because the file permissions in the Android sdcard cannot be changed, you can copy the executable files to the `/data/data/com.termux/files/home/bin` path, and then execute the following commands in Termux to add executable permission:
|
||||
|
||||
(Assumed that you have pushed the built executable files to the /sdcard/llama.cpp/bin path using `adb push`)
|
||||
```
|
||||
$cp -r /sdcard/llama.cpp/bin /data/data/com.termux/files/home/
|
||||
$cd /data/data/com.termux/files/home/bin
|
||||
$chmod +x ./*
|
||||
```
|
||||
|
||||
Download model [llama-2-7b-chat.Q4_K_M.gguf](https://huggingface.co/TheBloke/Llama-2-7B-Chat-GGUF/blob/main/llama-2-7b-chat.Q4_K_M.gguf), and push it to `/sdcard/llama.cpp/`, then move it to `/data/data/com.termux/files/home/model/`
|
||||
With Termux, you can install and run `llama.cpp` as if the environment were Linux. Once in the Termux shell:
|
||||
|
||||
```
|
||||
$mv /sdcard/llama.cpp/llama-2-7b-chat.Q4_K_M.gguf /data/data/com.termux/files/home/model/
|
||||
$ apt update && apt upgrade -y
|
||||
$ apt install git cmake
|
||||
```
|
||||
|
||||
Now, you can start chatting:
|
||||
Then, follow the [build instructions](https://github.com/ggerganov/llama.cpp/blob/master/docs/build.md), specifically for CMake.
|
||||
|
||||
Once the binaries are built, download your model of choice (e.g., from Hugging Face). It's recommended to place it in the `~/` directory for best performance:
|
||||
|
||||
```
|
||||
$cd /data/data/com.termux/files/home/bin
|
||||
$./llama-cli -m ../model/llama-2-7b-chat.Q4_K_M.gguf -n 128 -cml
|
||||
$ curl -L {model-url} -o ~/{model}.gguf
|
||||
```
|
||||
|
||||
Here's a demo of an interactive session running on Pixel 5 phone:
|
||||
Then, if you are not already in the repo directory, `cd` into `llama.cpp` and:
|
||||
|
||||
```
|
||||
$ ./build/bin/llama-simple -m ~/{model}.gguf -c {context-size} -p "{your-prompt}"
|
||||
```
|
||||
|
||||
Here, we show `llama-simple`, but any of the executables under `examples` should work, in theory. Be sure to set `context-size` to a reasonable number (say, 4096) to start with; otherwise, memory could spike and kill your terminal.
|
||||
|
||||
To see what it might look like visually, here's an old demo of an interactive session running on a Pixel 5 phone:
|
||||
|
||||
https://user-images.githubusercontent.com/271616/225014776-1d567049-ad71-4ef2-b050-55b0b3b9274c.mp4
|
||||
|
||||
## Cross-compile using Android NDK
|
||||
It's possible to build `llama.cpp` for Android on your host system via CMake and the Android NDK. If you are interested in this path, ensure you already have an environment prepared to cross-compile programs for Android (i.e., install the Android SDK). Note that, unlike desktop environments, the Android environment ships with a limited set of native libraries, and so only those libraries are available to CMake when building with the Android NDK (see: https://developer.android.com/ndk/guides/stable_apis.)
|
||||
|
||||
Once you're ready and have cloned `llama.cpp`, invoke the following in the project directory:
|
||||
|
||||
```
|
||||
$ cmake \
|
||||
-DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK/build/cmake/android.toolchain.cmake \
|
||||
-DANDROID_ABI=arm64-v8a \
|
||||
-DANDROID_PLATFORM=android-28 \
|
||||
-DCMAKE_C_FLAGS="-march=armv8.7a" \
|
||||
-DCMAKE_CXX_FLAGS="-march=armv8.7a" \
|
||||
-DGGML_OPENMP=OFF \
|
||||
-DGGML_LLAMAFILE=OFF \
|
||||
-B build-android
|
||||
```
|
||||
|
||||
Notes:
|
||||
- While later versions of Android NDK ship with OpenMP, it must still be installed by CMake as a dependency, which is not supported at this time
|
||||
- `llamafile` does not appear to support Android devices (see: https://github.com/Mozilla-Ocho/llamafile/issues/325)
|
||||
|
||||
The above command should configure `llama.cpp` with the most performant options for modern devices. Even if your device is not running `armv8.7a`, `llama.cpp` includes runtime checks for available CPU features it can use.
|
||||
|
||||
Feel free to adjust the Android ABI for your target. Once the project is configured:
|
||||
|
||||
```
|
||||
$ cmake --build build-android --config Release -j{n}
|
||||
$ cmake --install build-android --prefix {install-dir} --config Release
|
||||
```
|
||||
|
||||
After installing, go ahead and download the model of your choice to your host system. Then:
|
||||
|
||||
```
|
||||
$ adb shell "mkdir /data/local/tmp/llama.cpp"
|
||||
$ adb push {install-dir} /data/local/tmp/llama.cpp/
|
||||
$ adb push {model}.gguf /data/local/tmp/llama.cpp/
|
||||
$ adb shell
|
||||
```
|
||||
|
||||
In the `adb shell`:
|
||||
|
||||
```
|
||||
$ cd /data/local/tmp/llama.cpp
|
||||
$ LD_LIBRARY_PATH=lib ./bin/llama-simple -m {model}.gguf -c {context-size} -p "{your-prompt}"
|
||||
```
|
||||
|
||||
That's it!
|
||||
|
||||
Be aware that Android will not find the library path `lib` on its own, so we must specify `LD_LIBRARY_PATH` in order to run the installed executables. Android does support `RPATH` in later API levels, so this could change in the future. Refer to the previous section for information about `context-size` (very important!) and running other `examples`.
|
||||
|
||||
@ -1361,6 +1361,10 @@ if (MATH_LIBRARY)
|
||||
endif()
|
||||
endif()
|
||||
|
||||
if (CMAKE_SYSTEM_NAME MATCHES "Android")
|
||||
list(APPEND GGML_EXTRA_LIBS_PRIVATE dl) # Must be linked explicitly
|
||||
endif()
|
||||
|
||||
list(REMOVE_DUPLICATES GGML_EXTRA_LIBS_PRIVATE)
|
||||
list(REMOVE_DUPLICATES GGML_EXTRA_LIBS_PUBLIC)
|
||||
target_link_libraries(ggml PRIVATE ${GGML_EXTRA_LIBS_PRIVATE} PUBLIC ${GGML_EXTRA_LIBS_PUBLIC})
|
||||
|
||||
Loading…
Reference in New Issue
Block a user