How to cross-compile Linux alsa-lib dependency library?

2023-02-21

Products / Plugins:Video Call / Audio Call

Platform / Framework:Linux

This document will introduce how to cross-compile alsa-lib (libasound) for an aarch64 architecture embedded machine on an x86_64 machine with Ubuntu 20.04 as the system.

Install the dependency libraries required to compile alsa-lib.

$ apt update
$ apt install make automake libtool

$ apt update
$ apt install make automake libtool

Install the cross-compilation toolchain.

Note

This example installs the latest version of the GNU GCC toolchain. Please install the correct cross-compilation toolchain for your embedded machine according to your actual situation.

$ apt update
$ apt install gcc-aarch64-linux-gnu g++-aarch64-linux-gnu

$ apt update
$ apt install gcc-aarch64-linux-gnu g++-aarch64-linux-gnu

Download the latest version of alsa-lib source code from ALSA Official Website and extract it.

For example, download alsa-lib-1.2.7.2.tar.bz2 to local.

$ wget https://www.alsa-project.org/files/pub/lib/alsa-lib-1.2.7.2.tar.bz2
$ tar xf alsa-lib-1.2.7.2.tar.bz2
$ cd alsa-lib-1.2.7.2

$ wget https://www.alsa-project.org/files/pub/lib/alsa-lib-1.2.7.2.tar.bz2
$ tar xf alsa-lib-1.2.7.2.tar.bz2
$ cd alsa-lib-1.2.7.2

Then use tar to extract the source code and cd into the extracted directory.

Note

If you cannot find "wget", you can install "wget" through apt install wget.
If "tar" extraction fails, it may be that the system does not have the "bzip2" library installed. You can install it through apt install bzip2.

Generate the configuration file through ./configure.
```
$ ./configure --enable-shared=yes --enable-static=no --with-pic \
--host=aarch64-linux-gnu --prefix=/usr/aarch64-linux-gnu
```
```
$ ./configure --enable-shared=yes --enable-static=no --with-pic \
--host=aarch64-linux-gnu --prefix=/usr/aarch64-linux-gnu
```
- Specify the cross-compilation target as aarch64-linux-gnu through the --host parameter. You need to modify this according to your actual situation to your cross-compilation target.
- Specify the installation path as /usr/aarch64-linux-gnu through the --prefix parameter. You need to modify this according to your actual situation to the installation path of your cross-compilation toolchain.
Specify the number of parallel tasks for concurrent compilation through the -j parameter, or compile directly through make.
```
$ make -j$(nproc)
```
```
$ make -j$(nproc)
```
Install alsa-lib to the installation path of the cross-compilation toolchain through make install, which is the path specified by the prefix parameter in step 4.
```
$ make install
```
```
$ make install
```