GCCGO The gccgo command to run for ‘go build -compiler=gccgo’. 表示”go build -compiler=gccgo”,编译时指定的-compiler参数。 AR The command to use to manipulate library archives when building with the gccgo compiler. The default is ‘ar’. 打包工具,默认”ar”。 CC The command to use to compile C code. 编译C语言的工具。 CGO_ENABLED