Golang设置go env in SHELL

I have been trying and searching for days but haven't found solution so far. So ...

I'm looking to set go env in SHELL, instead of using godotenv or os.Setenv().

I know some go env, like GOROOT, GOPATH, ..., can easily be set with 'export GOROOT="/usr" in SHEL, e.g bash.

But other CGO flags, like CGO_CFLAGS, can't be done with export in SHELL - no effect and only shows up in shell env.

Please advise,

Thanks.