编译过程参考:

https://mediasoup.org/documentation/v3/libmediasoupclient/installation/

      build example部分；

goole 官方编译:

       https://webrtc.github.io/webrtc-org/native-code/development/

下载代码(代码总量有10多G）:

$ cd /home/foo/src

$ mkdir webrtc-checkout

$ cd webrtc-checkout

$ fetch --nohooks webrtc

$ gclient sync

切换到m79分支:

$ cd src

$ git checkout -b m79 refs/remotes/branch-heads/m79

$ gclient sync

设置编译选项:

In Linux Debian Stretch with GCC 6.3 this works:

$ gn gen out/mybuild-m79 --args='is_debug=false is_component_build=false is_clang=false rtc_include_tests=false rtc_use_h264=true rtc_enable_protobuf=false use_rtti=true use_custom_libcxx=false treat_warnings_as_errors=false use_ozone=true'

$ gn gen out/mybuild-m79 --args='is_debug=true is_component_build=false is_clang=false rtc_include_tests=false rtc_use_h264=true rtc_enable_protobuf=false use_rtti=true use_custom_libcxx=false treat_warnings_as_errors=false use_ozone=true'

编译:

$ ninja -C out/mybuild-m79

编译结果:

find out/mybuild-m79/  -name "*.a" | wc -l

132

会发现132个 .a文件, 其中包含 libwebrtc.a

gclient sync  遇到的问题：

Failed to downloadhttps://commondatastorage.googleapis.com/chrome-linux-sysroot/toolchain/bcc994cc6e5d4d6f0eec8b44e7f0a65f5a1a7b90/debian_sid_amd64_sysroot.tar.xz

解决:

这个链接需要翻墙; 

问题:

urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed

解决:

https://medium.com/@moreless/how-to-fix-python-ssl-certificate-verify-failed-97772d9dd14c

export PYTHONHTTPSVERIFY=0

或者在python脚本里边加入以下语句:

import ssl

ssl._create_default_https_context = ssl._create_unverified_context

问题:

gclient sync                     

Warning: Running gclient on Python 3.

If you encounter any issues, please file a bug on crbug.com under the Infra>SDK component.

Syncing projects:  32% (12/37) src/buildtools/third_party/libc++/trunk 

src/third_party (ERROR)

----------------------------------------

[0:00:01] Started.

[0:00:01] Finished running: git config remote.origin.url

[0:00:01] Finished running: git rev-list -n 1 HEAD

[0:00:01] Finished running: git rev-parse --abbrev-ref=strict HEAD

----------------------------------------

Error: 6>

6> ____ src/third_party at 943906bccceea25a84c1bf8bc71550bf91dd8d89

6>      You have unstaged changes.

6>      Please commit, stash, or reset.

解决:

原因就是你改动了，src/third_party这个文件夹下面的文件，解决方法就是到

cd src/third_party

git status

根据git status 看看那些改动

然后 git add 相应的改动即可

问题:

depot_tools\download_from_google_storage.py

这个脚本下载文件失败;

解决:

直接让该脚本的main函数 return  0 即可,  即我们不下载相关内容,  因为我们编译webrtc 不需要这些, 这些依赖可能是编译 chrome 所需要的内容;