google构建

GN构建系统

下载depot_tools并设置环境变量

1. git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git (需要翻墙)

2. 设置环境变量 将depot_tools的路径添加到环境变量(建议放置第一条，在python环境变量之前)

3. 禁止工具升级 ==设置环境变量== DEPOT_TOOLS_UPDATE=0 或者 ==删除.git目录==

工具库包含

• gclient 支持svn和git
• gcl 预提交脚本for svn python的codeview
• git-cl 预提交脚本for git python的codeview
• svn
• drover 快速还原svn提交
• cpplint.py 静态检查工具
• pylint python静态检查工具
• presubmit_support.py脚本
• repo: The repo tool.
• zsh-goodies 补全
• wtf
• weekly
• git-gs

GN exe的生成

GN是一个元构建系统，可为Ninja生成构建文件。

1. git clone https://gn.googlesource.com/gn

2. python build/gen.py

3. ninja -C out(环境要有ninja)

GN使用命令

1. 生成构建目录 gn gen out/windows_x86_debug

2. 添加构建参数 gn args out/windows_x86_debug

// gn args --list out/windows_x86_debug
is_debug = true
is_official_build=false
is_component_build = false
target_cpu="x64"
symbol_level = 0
is_win_fastlink = true   //不生成pdb

// 交叉编译 https://gn.googlesource.com/gn/+/master/docs/cross_compiles.md
target_os = "chromeos"
target_os = "android"

target_cpu = "arm"
target_cpu = "x86"
target_cpu = "x64"

编写GN文件

1. 根目录下创建.gn文件

一般build目录下都有一些默认的配置 tool_chain

# The location of the build configuration file.
buildconfig = "//build/BUILDCONFIG.gn"

2. 创建BUILD.gn

## 可执行程序
executable("hello") {
  sources = [ "hello.cc" ]

  deps = [
    ":hello_shared",
    ":hello_static",
  ]
}

## dll
shared_library("hello_shared") {
  sources = [
    "hello_shared.cc",
    "hello_shared.h",
  ]

  defines = [ "HELLO_SHARED_IMPLEMENTATION" ]
}

## lib
static_library("hello_static") {
  sources = [
    "hello_static.cc",
    "hello_static.h",
  ]
}

ninja

1. git clone git://github.com/ninja-build/ninja.git

2. cmake 编译或者https://github.com/ninja-build/ninja/releases下载binary

编译问题

warning: A compatible version of re2c (>= 0.11.3) was not found; changes to src/*.in.cc will not affect your build.
wrote build.ninja.

安装re2c http://re2c.org/

build config

win

1. Microsoft Message Compiler (mc.exe)

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