Windows 版本的 Webrtc 的編譯 ( 基于聲網鏡像 )
前期準備：
1. 作業系統
Windows 10 Preview Build 17063或之后的版本，需要命令 curl 和 tar ， 以及 PowerShell 的功能
怎么驗證是否支持 curl 與 tar， 打開 PowerShell
這個是必須要支持的，因為在 webrtc 的下載程序中，需要這些指令支持！
2. git 的安裝
git - https://git-scm.com/download/win
3. vs2017 的安裝
visualstudio2017community - https://download.visualstudio.microsoft.com/download/pr/aaebc214-bc67-4137-9bea-04fcb0c90720/2e18f27594472d0c7515d9cbe237bd56/vs_community.exe
3.1 Modify "Windows Software Development Kit" > +Debugging Tools for Windows 這個是必須的
這個 Windows Phone Kits 應該有多個版本，都全部勾選上 Debugging Tools For Windows
3.2 SDK 版本的選擇
這些必須選擇好，否則編譯程序中依賴的 LIB, INCLUDE 的就不完整，導致編譯失敗，比如：
AssertionError File "C:/Users/Administrator/webrtc/src/build/toolchain/win/setup_toolchain.py", line 278, in main
assert vc_lib_atlmfc_path
4. python 的安裝
python2 - https://www.python.org/downloads/release/python-2716/
4.1 pip 的安裝
https://www.cnblogs.com/baiyuer/p/9606773.html
環境變數的配置
4.2 pywin32 模塊的安裝 pip install pywin32
這個模塊不安裝，編譯程序中，會出現 “ No module named win32file ” 的錯誤
環境配置
1. git 的基本配置，把下述內容保存為檔案 git_env.bat 檔案，等待備用
git config --global user.email "freeabc@qiyicc.com"
git config --global user.name "freeabc"
git config --global url.http://120.92.49.206:3232/chromiumsrc/webrtc.git.insteadOf https://chromium.googlesource.com/external/webrtc.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/base.git.insteadOf https://chromium.googlesource.com/chromium/src/base
git config --global url.http://120.92.49.206:3232/chromiumsrc/build.git.insteadOf https://chromium.googlesource.com/chromium/src/build
git config --global url.http://120.92.49.206:3232/chromiumsrc/buildtools.git.insteadOf https://chromium.googlesource.com/chromium/src/buildtools
git config --global url.http://120.92.49.206:3232/chromiumsrc/gradle.git.insteadOf https://chromium.googlesource.com/external/github.com/gradle/gradle.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/ios.git.insteadOf https://chromium.googlesource.com/chromium/src/ios.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/testing.git.insteadOf https://chromium.googlesource.com/chromium/src/testing
git config --global url.http://120.92.49.206:3232/chromiumsrc/third_party.git.insteadOf https://chromium.googlesource.com/chromium/src/third_party
git config --global url.http://120.92.49.206:3232/chromiumsrc/clang-format.git.insteadOf https://chromium.googlesource.com/chromium/llvm-project/cfe/tools/clang-format.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/libcxx.git.insteadOf https://chromium.googlesource.com/chromium/llvm-project/libcxx.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/libcxxabi.git.insteadOf https://chromium.googlesource.com/chromium/llvm-project/libcxxabi.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/libunwind.git.insteadOf https://chromium.googlesource.com/external/llvm.org/libunwind.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/android_ndk.git.insteadOf https://chromium.googlesource.com/android_ndk.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/android_tools.git.insteadOf https://chromium.googlesource.com/android_tools.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/auto.git.insteadOf https://chromium.googlesource.com/external/github.com/google/auto.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/catapult.git.insteadOf https://chromium.googlesource.com/catapult.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/compact_enc_det.git.insteadOf https://chromium.googlesource.com/external/github.com/google/compact_enc_det.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/colorama.git.insteadOf https://chromium.googlesource.com/external/colorama.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/depot_tools.git.insteadOf https://chromium.googlesource.com/chromium/tools/depot_tools.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/errorprone.git.insteadOf https://chromium.googlesource.com/chromium/third_party/errorprone.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/ffmpeg.git.insteadOf https://chromium.googlesource.com/chromium/third_party/ffmpeg.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/findbugs.git.insteadOf https://chromium.googlesource.com/chromium/deps/findbugs.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/freetype2.git.insteadOf https://chromium.googlesource.com/chromium/src/third_party/freetype2.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/harfbuzz.git.insteadOf https://chromium.googlesource.com/external/github.com/harfbuzz/harfbuzz.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/gtest-parallel.git.insteadOf https://chromium.googlesource.com/external/github.com/google/gtest-parallel
git config --global url.http://120.92.49.206:3232/chromiumsrc/googletest.git.insteadOf https://chromium.googlesource.com/external/github.com/google/googletest.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/icu.git.insteadOf https://chromium.googlesource.com/chromium/deps/icu.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/jsr-305.git.insteadOf https://chromium.googlesource.com/external/jsr-305.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/jsoncpp.git.insteadOf https://chromium.googlesource.com/external/github.com/open-source-parsers/jsoncpp.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/junit.git.insteadOf https://chromium.googlesource.com/external/junit.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/fuzzer.git.insteadOf https://chromium.googlesource.com/chromium/llvm-project/compiler-rt/lib/fuzzer.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/libjpeg_turbo.git.insteadOf https://chromium.googlesource.com/chromium/deps/libjpeg_turbo.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/libsrtp.git.insteadOf https://chromium.googlesource.com/chromium/deps/libsrtp.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/libvpx.git.insteadOf https://chromium.googlesource.com/webm/libvpx.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/libyuv.git.insteadOf https://chromium.googlesource.com/libyuv/libyuv.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/linux-syscall-support.git.insteadOf https://chromium.googlesource.com/linux-syscall-support.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/mockito.git.insteadOf https://chromium.googlesource.com/external/mockito/mockito.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/nasm.git.insteadOf https://chromium.googlesource.com/chromium/deps/nasm.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/openh264.git.insteadOf https://chromium.googlesource.com/external/github.com/cisco/openh264
git config --global url.http://120.92.49.206:3232/chromiumsrc/requests.git.insteadOf https://chromium.googlesource.com/external/github.com/kennethreitz/requests.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/robolectric.git.insteadOf https://chromium.googlesource.com/external/robolectric.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/ub-uiautomator.git.insteadOf https://chromium.googlesource.com/chromium/third_party/ub-uiautomator.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/usrsctp.git.insteadOf https://chromium.googlesource.com/external/github.com/sctplab/usrsctp
git config --global url.http://120.92.49.206:3232/chromiumsrc/binaries.git.insteadOf https://chromium.googlesource.com/chromium/deps/yasm/binaries.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/patched-yasm.git.insteadOf https://chromium.googlesource.com/chromium/deps/yasm/patched-yasm.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/tools.git.insteadOf https://chromium.googlesource.com/chromium/src/tools
git config --global url.http://120.92.49.206:3232/chromiumsrc/client-py.git.insteadOf https://chromium.googlesource.com/infra/luci/client-py.git
git config --global url.http://120.92.49.206:3232/chromiumsrc/boringssl.git.insteadOf https://boringssl.googlesource.com/boringssl.git2. 編譯前的環境準備，把下述內容保存為檔案 pre_build.bat，以備用
set GYP_DEFINES = target_arch=x64
set GYP_MSVS_VERSION=2017
set LIB=C:\Program Files (x86)\Windows Kits\10\Lib\10.0.17763.0\ucrt\x64;F:\Windows Kits\10\Lib\10.0.17763.0\um\x64;
set INCLUDE=C:\Program Files (x86)\Windows Kits\10\Include\10.0.17763.0\shared;F:\Windows Kits\10\Include\10.0.17763.0\ucrt;F:\Windows Kits\10\Include\10.0.17763.0\um;F:\Windows Kits\10\Include\10.0.17763.0\winrt;
set DEPOT_TOOLS_UPDATE=0
set GYP_MSVS_VERSION=2017
set GYP_MSVS_OVERRIDE_PATH=C:\Program Files (x86)\Microsoft Visual Studio\2017\Community
set GYP_DEFINES=target_arch=x64
set GYP_GENERATORS=msvs-ninja,ninja 千萬注意 LIB， INCLUDE， GYP_MSVS_OVERRIDE_PATH，GYP_MSVS_VERSION 要修改為你本地安裝的實際路徑，上述例子是我機器上的絕對路徑！！！！！！
編譯程序
1. 首先執行上述的腳本 git_env.bat
2. 下載 depot_tools
git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git -b gitlab
3. 配置 depot_tools 的環境變數，見上述 4.1 中的截圖
4.創建目錄 webrtc
5. 打開 cmd.exe 并進入到 webrtc 目錄
6. gclient config --name src https://chromium.googlesource.com/external/webrtc.git@gitlab
7. 配置環境變數
7.1 set CDS_CLANG_BUCKET_OVERRIDE=http://120.92.49.206:3232/chromiumsrc/commondatastorage/raw/master/public/chromium-browser-clang
7.2 set DEPOT_TOOLS_WIN_TOOLCHAIN=08. 同步 path
gclient sync --patch-ref=https://chromium.googlesource.com/chromium/src/build.git@gitlab
9. 執行上述腳本 pre_build.bat
10. gn gen out/Default --ide=vs2017
11. ninja -C out/Default
如果順利，基本可以編譯通過！
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