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ubuntu下交叉编译tinyalsa

 
  • 2023年 12月10日

环境

  • Ubuntu 20.04.2 LTS

  • tinyalsa-2.0.0

下载源码

Github https://github.com/tinyalsa/tinyalsa

解压

tar -xvf tinyalsa-2.0.0.tar.bz2

编译源码

添加交叉编译配置

# vim toolchain_arm_linux_gcc.cmake
# 设置C和C++编译器路径
set(CMAKE_C_COMPILER "/usr/local/arm/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-gcc")
set(CMAKE_CXX_COMPILER "/usr/local/arm/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-g++")

# 设置编译选项
set(CMAKE_C_FLAGS "-Wall -Wextra -Werror -Wfatal-errors")
set(CMAKE_CXX_FLAGS "-Wall -Wextra -Werror -Wfatal-errors")

mkdir _install
mkdir arm_build
cd arm_build
cmake .. --no-warn-unused-cli -DCMAKE_BUILD_TYPE:STRING=Debug -DCMAKE_TOOLCHAIN_FILE=../toolchain_arm_linux_gcc.cmake -DCMAKE_INSTALL_PREFIX=$PWD/../_install
cmake --build .
cmake --install .

报错

/home/cosmos/workspace/3rdparty/tinyalsa-2.0.0/src/pcm.c: In function ‘pcm_hw_mmap_status’:
/home/cosmos/workspace/3rdparty/tinyalsa-2.0.0/src/pcm.c:626:29: error: overflow in implicit constant conversion [-Werror=overflow]
                             SNDRV_PCM_MMAP_OFFSET_STATUS);
                             ^
compilation terminated due to -Wfatal-errors.

/home/cosmos/workspace/3rdparty/tinyalsa-2.0.0/src/pcm.c: In function ‘pcm_hw_mmap_status’:
/home/cosmos/workspace/3rdparty/tinyalsa-2.0.0/src/pcm.c:633:42: error: overflow in implicit constant conversion [-Werror=overflow]
                              MAP_SHARED, SNDRV_PCM_MMAP_OFFSET_CONTROL);
                                          ^
compilation terminated due to -Wfatal-errors.

解决办法：

# 添加一个强制转换
(off_t)SNDRV_PCM_MMAP_OFFSET_STATUS
(off_t)SNDRV_PCM_MMAP_OFFSET_CONTROL
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