如何通过GN构建铬时为特定目标提供自定义链接器标志？

Question

我正在尝试在我的本地机器上构建最新的铬（cef）。我使用GN框架通过automate-git.py成功构建了它。但是，我还需要为特定目标（libcef）提供一些额外的链接器标志。

我相信这是通过在创建新的构建目录时更改args.gn文件来完成的。但是，我无法获得关于如何在GN中为特定目标提供链接器标志的充分文档。

任何帮助都将不胜感激。

Answer 1

关于铬构建配置，您可以参考以下链接：

1. 构建说明（Android） https://www.chromium.org/developers/how-tos/android-build-instructions

2. gn构建系统的指南 https://chromium.googlesource.com/chromium/src/+/master/tools/gn/docs/quick_start.md

3. 关于链接标志，您可以参考：ldflags https://codereview.chromium.org/1887303003/diff/20001/build/config/compiler/BUILD.gn

   ldflags += [
     "-fPIC",
     "-Wl,-z,noexecstack",
     "-Wl,-z,now",
     "-Wl,-z,relro",
   ]
   if (!using_sanitizer) {
     if (!use_cfi_diag) {
       ldflags += [ "-Wl,-z,defs" ]
     }
   
     # Functions interposed by the sanitizers can make ld think
     # that some libraries aren't needed when they actually are,
     # http://crbug.com/234010. As workaround, disable --as-needed.
     if (!is_nacl && !is_android) {
       # TODO(pcc): Fix linker bug which requires us to link pthread
       # unconditionally here (crbug.com/623236).
       ldflags += [
         "-Wl,--no-as-needed",
         "-lpthread",
       ]
     }
     ldflags += [ "-Wl,--as-needed" ]
   }
   

   }