禁止把 Windows PATH 注入到 WSL

现象

在编译buildroot时候提示：

dky@LAPTOP-Q5IILQ3E:~/workspaces_buildroot/buildroot-2020.02.12$ make V=1
/usr/bin/make -j1 O=/home/dky/workspaces_buildroot/buildroot-2020.02.12/output HOSTCC="/usr/bin/gcc" HOSTCXX="/usr/bin/g++" syncconfig
make[1]: Entering directory '/home/dky/workspaces_buildroot/buildroot-2020.02.12'
make[1]: Leaving directory '/home/dky/workspaces_buildroot/buildroot-2020.02.12'

Your PATH contains spaces, TABs, and/or newline (\n) characters.
This doesn't work. Fix you PATH.
make: *** [support/dependencies/dependencies.mk:27: dependencies] Error 1

大意是说：path路径中包含空格回车等，导致编译失败。

查看printf '%s\n' "$PATH" | cat -A后发现有windows的path变量，如下：

原因

这是因为WSL 默认会把 Windows 的 PATH拼进来

解决方法

因此解决方法就是：要么将这些多余的PATH环境变量暂时屏蔽掉，要么彻底关掉windows的path注入wsl。我选择后者，具体做法如下：****

编辑（或创建）这个文件：

1	sudo nano /etc/wsl.conf

写入：

1 2	[interop] appendWindowsPath=false

然后在 Windows PowerShell（不是 WSL 里）执行重启 WSL：

1	wsl --shutdown

重新打开 WSL 终端，再检查：

1	printf '%s\n' "$PATH" \| cat -A

输出

1
2

dky@LAPTOP-Q5IILQ3E:~/workspaces_buildroot/buildroot-2020.02.12$ printf '%s\n' "$PATH" | cat -A
/home/dky/.vscode-server/data/User/globalStorage/github.copilot-chat/debugCommand:/home/dky/.vscode-server/data/User/globalStorage/github.copilot-chat/copilotCli:/home/dky/.vscode-server/bin/994fd12f8d3a5aa16f17d42c041e5809167e845a/bin/remote-cli:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/wsl/lib:/snap/bin$