最近查看了一下 go env 和别人的查看的有些不同.

``` GOARCH="/Users/li/Documents/GO_WorkSpace" GOBIN="/usr/local/go/bin" GOEXE="" GOHOSTARCH="amd64" GOHOSTOS="darwin" GOOS="darwin" GOPATH="/Users/li/workspace/go" GORACE="" GOROOT="/usr/local/go" GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64" CC="clang" GOGCCFLAGS="-fPIC -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/gc/dm237vks1txbcmcbmyrb2p6m0000gn/T/go-build824080492=/tmp/go-build -gno-record-gcc-switches -fno-common" CXX="clang++" CGO_ENABLED="0" 而和别人不同的是这三个: CC="gcc" CXX="g++" CGO_ENABLED="1" ``` 请问有什么不同吗?