Support 32-bit ARM Linux (#202)

+# Modified from https://github.com/Tencent/ncnn/blob/master/.github/workflows/linux-arm-cpu-gcc.yml
+name: aarch64-linux-gnu
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - '.github/workflows/aarch64-linux-gnu.yaml'
+      - 'CMakeLists.txt'
+      - 'cmake/**'
+      - 'sherpa-onnx/csrc/*'
+      - 'toolchains/aarch64-linux-gnu.toolchain.cmake'
+  pull_request:
+    branches:
+      - master
+    paths:
+      - '.github/workflows/aarch64-linux-gnu.yaml'
+      - 'CMakeLists.txt'
+      - 'cmake/**'
+      - 'sherpa-onnx/csrc/*'
+      - 'toolchains/aarch64-linux-gnu.toolchain.cmake'
+
+concurrency:
+  group: aarch64-linux-gnu-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  aarch64_linux_gnu:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: cache-qemu
+        id: cache-qemu
+        uses: actions/cache@v3
+        with:
+          path: qemu-install
+          key: qemu-aarch64-install-20220908
+
+      - name: install-qemu-build-deps
+        if: steps.cache-qemu.outputs.cache-hit != 'true'
+        run: |
+          sudo apt-get update
+          sudo apt-get install autoconf automake autotools-dev ninja-build
+
+      - name: checkout-qemu
+        if: steps.cache-qemu.outputs.cache-hit != 'true'
+        uses: actions/checkout@v3
+        with:
+          repository: qemu/qemu
+          path: qemu
+          ref: f5643914a9e8f79c606a76e6a9d7ea82a3fc3e65
+
+      - name: qemu
+        if: steps.cache-qemu.outputs.cache-hit != 'true'
+        run: |
+          cd qemu
+          ./configure --prefix=$GITHUB_WORKSPACE/qemu-install --target-list=aarch64-linux-user --disable-system
+          make -j2
+          make install
+
+      - name: cache-toolchain
+        id: cache-toolchain
+        uses: actions/cache@v3
+        with:
+          path: toolchain
+          key: gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu
+
+      - name: Download toolchain
+        if: steps.cache-toolchain.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          wget https://releases.linaro.org/components/toolchain/binaries/latest-7/aarch64-linux-gnu/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar.xz
+
+          mkdir $GITHUB_WORKSPACE/toolchain
+          tar xvf ./gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar.xz --strip-components 1 -C $GITHUB_WORKSPACE/toolchain
+
+      - name: Display toolchain info
+        shell: bash
+        run: |
+          export PATH=$GITHUB_WORKSPACE/toolchain/bin:$PATH
+          aarch64-linux-gnu-gcc --version
+
+      - name: Display qemu-aarch64 -h
+        shell: bash
+        run: |
+          export PATH=$GITHUB_WORKSPACE/qemu-install/bin:$PATH
+          export QEMU_LD_PREFIX=$GITHUB_WORKSPACE/toolchain/aarch64-linux-gnu/libc
+          qemu-aarch64 -h
+
+      - name: build aarch64-linux-gnu
+        shell: bash
+        run: |
+          export PATH=$GITHUB_WORKSPACE/toolchain/bin:$PATH
+
+          ./build-aarch64-linux-gnu.sh
+
+          ls -lh build-aarch64-linux-gnu/bin
+          ls -lh build-aarch64-linux-gnu/lib
+
+          file build-aarch64-linux-gnu/bin/sherpa-onnx
+
+      - name: Test sherpa-onnx
+        shell: bash
+        run: |
+          export PATH=$GITHUB_WORKSPACE/toolchain/bin:$PATH
+          export PATH=$GITHUB_WORKSPACE/qemu-install/bin:$PATH
+          export QEMU_LD_PREFIX=$GITHUB_WORKSPACE/toolchain/aarch64-linux-gnu/libc
+
+
+          ls -lh ./build-aarch64-linux-gnu/bin
+
+          qemu-aarch64 ./build-aarch64-linux-gnu/bin/sherpa-onnx --help

+# Modified from https://github.com/Tencent/ncnn/blob/master/.github/workflows/linux-arm-cpu-gcc.yml
+name: arm-linux-gnueabihf
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - '.github/workflows/arm-linux-gnueabihf.yaml'
+      - 'CMakeLists.txt'
+      - 'cmake/**'
+      - 'sherpa-onnx/csrc/*'
+      - 'toolchains/arm-linux-gnueabihf.toolchain.cmake'
+  pull_request:
+    branches:
+      - master
+    paths:
+      - '.github/workflows/arm-linux-gnueabihf.yaml'
+      - 'CMakeLists.txt'
+      - 'cmake/**'
+      - 'sherpa-onnx/csrc/*'
+      - 'toolchains/arm-linux-gnueabihf.toolchain.cmake'
+
+concurrency:
+  group: arm-linux-gnueabihf-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  arm_linux_gnueabihf:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: cache-qemu
+        id: cache-qemu
+        uses: actions/cache@v3
+        with:
+          path: qemu-install
+          key: qemu-arm-install-20220907
+
+      - name: install-qemu-build-deps
+        if: steps.cache-qemu.outputs.cache-hit != 'true'
+        run: |
+          sudo apt-get update
+          sudo apt-get install autoconf automake autotools-dev ninja-build
+
+      - name: checkout-qemu
+        if: steps.cache-qemu.outputs.cache-hit != 'true'
+        uses: actions/checkout@v3
+        with:
+          repository: qemu/qemu
+          path: qemu
+          ref: f5643914a9e8f79c606a76e6a9d7ea82a3fc3e65
+
+      - name: qemu
+        if: steps.cache-qemu.outputs.cache-hit != 'true'
+        run: |
+          cd qemu
+          ./configure --prefix=$GITHUB_WORKSPACE/qemu-install --target-list=arm-linux-user --disable-system
+          make -j2
+          make install
+
+      - name: cache-toolchain
+        id: cache-toolchain
+        uses: actions/cache@v3
+        with:
+          path: toolchain
+          key: gcc-arm-8.3-2019.03-x86_64-arm-linux-gnueabihf
+
+      - name: Download toolchain
+        if: steps.cache-toolchain.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          git lfs install
+          git clone https://huggingface.co/csukuangfj/arm-linux-gcc
+          ls -lh arm-linux-gcc
+
+          mkdir $GITHUB_WORKSPACE/toolchain
+          tar xvf ./arm-linux-gcc/gcc-arm-8.3-2019.03-x86_64-arm-linux-gnueabihf.tar.xz --strip-components 1 -C $GITHUB_WORKSPACE/toolchain
+
+      - name: Display toolchain info
+        shell: bash
+        run: |
+          export PATH=$GITHUB_WORKSPACE/toolchain/bin:$PATH
+          arm-linux-gnueabihf-gcc --version
+
+      - name: Display qemu-arm -h
+        shell: bash
+        run: |
+          export PATH=$GITHUB_WORKSPACE/qemu-install/bin:$PATH
+          export QEMU_LD_PREFIX=$GITHUB_WORKSPACE/toolchain/arm-linux-gnueabihf/libc
+          qemu-arm -h
+
+      - name: build arm-linux-gnueabihf
+        shell: bash
+        run: |
+          export PATH=$GITHUB_WORKSPACE/toolchain/bin:$PATH
+
+          ./build-arm-linux-gnueabihf.sh
+
+          ls -lh build-arm-linux-gnueabihf/bin
+          ls -lh build-arm-linux-gnueabihf/lib
+
+          file build-arm-linux-gnueabihf/bin/sherpa-onnx
+
+      - name: Test sherpa-onnx
+        shell: bash
+        run: |
+          export PATH=$GITHUB_WORKSPACE/toolchain/bin:$PATH
+          export PATH=$GITHUB_WORKSPACE/qemu-install/bin:$PATH
+          export QEMU_LD_PREFIX=$GITHUB_WORKSPACE/toolchain/arm-linux-gnueabihf/libc
+
+
+          ls -lh ./build-arm-linux-gnueabihf/bin
+
+          qemu-arm ./build-arm-linux-gnueabihf/bin/sherpa-onnx --help

@@ -9,6 +9,7 @@ dist/
 sherpa_onnx.egg-info/
 .DS_Store
 build-aarch64-linux-gnu
+build-arm-linux-gnueabihf
 sherpa-onnx-streaming-zipformer-*
 sherpa-onnx-lstm-en-*
 sherpa-onnx-lstm-zh-*

+#!/usr/bin/env bash
+
+if ! command -v arm-linux-gnueabihf-gcc  &> /dev/null; then
+  echo "Please install a toolchain for cross-compiling."
+  echo "You can refer to: "
+  echo "  https://k2-fsa.github.io/sherpa/onnx/install/arm-embedded-linux.html"
+  echo "for help."
+  exit 1
+fi
+
+set -ex
+
+dir=build-arm-linux-gnueabihf
+mkdir -p $dir
+cd $dir
+
+if [ ! -f alsa-lib/src/.libs/libasound.so ]; then
+  echo "Start to cross-compile alsa-lib"
+  if [ ! -d alsa-lib ]; then
+    git clone --depth 1 https://github.com/alsa-project/alsa-lib
+  fi
+  pushd alsa-lib
+  CC=arm-linux-gnueabihf-gcc ./gitcompile --host=arm-linux-gnueabihf
+  popd
+  echo "Finish cross-compiling alsa-lib"
+fi
+
+export CPLUS_INCLUDE_PATH=$PWD/alsa-lib/include:$CPLUS_INCLUDE_PATH
+export SHERPA_ONNX_ALSA_LIB_DIR=$PWD/alsa-lib/src/.libs
+
+cmake \
+  -DCMAKE_INSTALL_PREFIX=./install \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DBUILD_SHARED_LIBS=OFF \
+  -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+  -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+  -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+  -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+  -DSHERPA_ONNX_ENABLE_JNI=OFF \
+  -DSHERPA_ONNX_ENABLE_C_API=OFF \
+  -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
+  -DCMAKE_TOOLCHAIN_FILE=../toolchains/arm-linux-gnueabihf.toolchain.cmake \
+  ..
+
+make VERBOSE=1 -j4
+make install/strip
+
+cp -v $SHERPA_ONNX_ALSA_LIB_DIR/libasound.so* ./install/lib/

 function(download_onnxruntime)
   include(FetchContent)
 
-  if(CMAKE_SYSTEM_PROCESSOR STREQUAL aarch64)
+  message(STATUS "CMAKE_SYSTEM_NAME: ${CMAKE_SYSTEM_NAME}")
+  message(STATUS "CMAKE_SYSTEM_PROCESSOR: ${CMAKE_SYSTEM_PROCESSOR}")
+
+  if(CMAKE_SYSTEM_NAME STREQUAL Linux AND CMAKE_SYSTEM_PROCESSOR STREQUAL aarch64)
     # For embedded systems
     set(possible_file_locations
       $ENV{HOME}/Downloads/onnxruntime-linux-aarch64-1.14.0.tgz
@@ -13,6 +16,18 @@ function(download_onnxruntime)
     set(onnxruntime_URL  "https://github.com/microsoft/onnxruntime/releases/download/v1.14.0/onnxruntime-linux-aarch64-1.14.0.tgz")
     set(onnxruntime_URL2 "https://huggingface.co/csukuangfj/sherpa-onnx-cmake-deps/resolve/main/onnxruntime-linux-aarch64-1.14.0.tgz")
     set(onnxruntime_HASH "SHA256=9384d2e6e29fed693a4630303902392eead0c41bee5705ccac6d6d34a3d5db86")
+  elseif(CMAKE_SYSTEM_NAME STREQUAL Linux AND CMAKE_SYSTEM_PROCESSOR STREQUAL arm)
+    # For embedded systems
+    set(possible_file_locations
+      $ENV{HOME}/Downloads/onnxruntime-linux-arm-1.14.0.zip
+      ${PROJECT_SOURCE_DIR}/onnxruntime-linux-arm-1.14.0.zip
+      ${PROJECT_BINARY_DIR}/onnxruntime-linux-arm-1.14.0.zip
+      /tmp/onnxruntime-linux-arm-1.14.0.zip
+      /star-fj/fangjun/download/github/onnxruntime-linux-arm-1.14.0.zip
+    )
+    set(onnxruntime_URL  "https://huggingface.co/csukuangfj/onnxruntime-libs/resolve/main/onnxruntime-linux-arm-1.14.0.zip")
+    set(onnxruntime_URL2 "")
+    set(onnxruntime_HASH "SHA256=61e4a4fa2d211a24e878e25bfcdee0daee5a68ac8d2d2967c0000b0fb079385c")
   elseif(CMAKE_SYSTEM_NAME STREQUAL Linux AND CMAKE_SYSTEM_PROCESSOR STREQUAL x86_64)
     # If you don't have access to the Internet,
     # please pre-download onnxruntime

+# Copied from https://github.com/Tencent/ncnn/blob/master/toolchains/arm-linux-gnueabihf.toolchain.cmake
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_PROCESSOR arm)
+
+set(CMAKE_C_COMPILER "arm-linux-gnueabihf-gcc")
+set(CMAKE_CXX_COMPILER "arm-linux-gnueabihf-g++")
+
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+
+set(CMAKE_C_FLAGS "-march=armv7-a -mfloat-abi=hard -mfpu=neon")
+set(CMAKE_CXX_FLAGS "-march=armv7-a -mfloat-abi=hard -mfpu=neon")
+
+# cache flags
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}" CACHE STRING "c flags")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" CACHE STRING "c++ flags")