Mac 中 go get 报错 compile: version "go1.16" does not match go tool version "go1.16.3"

报错信息如下

# internal/unsafeheader
compile: version "go1.16" does not match go tool version "go1.16.3"
# unicode/utf8
compile: version "go1.16" does not match go tool version "go1.16.3"

原因分析

我们在系统中 有多个 go 环境造成的；

• 如果是通过 brew install go 的方式安装的 go环境【1.16.3】；
  那么，go的环境会默认安装在路径如下 /usr/local/Cellar

jason@local bin$ ls  -la /usr/local/bin/go*
lrwxr-xr-x  1 jason  admin  26  9 15 16:10 go -> ../Cellar/go/1.16.3/bin/go
lrwxr-xr-x  1 jason  admin  39  3 27 20:14 gobject-query -> ../Cellar/glib/2.66.7/bin/gobject-query
lrwxr-xr-x  1 jason  admin  29  9 15 16:10 gofmt -> ../Cellar/go/1.16.3/bin/gofmt

这就成就了 go1.16.3 的环境

• 如果是通过下载安装包的方式安装的 go 环境【1.16】；
  那么，go的默认安装路径如下 /usr/local/go

jason@local bin$ ls /usr/local/go 
AUTHORS         CONTRIBUTORS    PATENTS         SECURITY.md     api             doc             lib             pkg             src
CONTRIBUTING.md LICENSE         README.md       VERSION         bin             favicon.ico     misc            robots.txt      test

• 而我们系统PATH中配置 go的环境假设在 /usr/local/bin 下

jason@local bin$ ls  -la /usr/local/bin/go*
lrwxr-xr-x  1 jason  admin  26  9 15 16:10 go -> ../Cellar/go/1.16.3/bin/go
lrwxr-xr-x  1 jason  admin  39  3 27 20:14 gobject-query -> ../Cellar/glib/2.66.7/bin/gobject-query
lrwxr-xr-x  1 jason  admin  29  9 15 16:10 gofmt -> ../Cellar/go/1.16.3/bin/gofmt

• 系统再编译go的时候，系统调用的应该是【 /usr/local/go/bin 下面的 1.16 环境】，go tool 中使用的 应该是 【/usr/local/bin 下面的 1.16.3环境】

解决方案

• 卸载 1.16.3 的 go

jason@local bin$ brew uninstall go
Error: Refusing to uninstall /usr/local/Cellar/go/1.16.3
because it is required by glide, which is currently installed.
You can override this and force removal with:
  brew uninstall --ignore-dependencies go
jason@local bin$ brew uninstall --ignore-dependencies go
Uninstalling /usr/local/Cellar/go/1.16.3... (9,955 files, 503.5MB)

• 手动建立软连接（/usr/local/bin 目录下）

jason@local bin$ cd /usr/local/bin
jason@local bin$ ln -s  /usr/local/go/bin/go ./go
jason@local bin$ ln -s  /usr/local/go/bin/gofmt ./gofmt