KnownEnv is a list of environment variables that affect the operation of the Go command.
const KnownEnv = `
AR
CC
CGO_CFLAGS
CGO_CFLAGS_ALLOW
CGO_CFLAGS_DISALLOW
CGO_CPPFLAGS
CGO_CPPFLAGS_ALLOW
CGO_CPPFLAGS_DISALLOW
CGO_CXXFLAGS
CGO_CXXFLAGS_ALLOW
CGO_CXXFLAGS_DISALLOW
CGO_ENABLED
CGO_FFLAGS
CGO_FFLAGS_ALLOW
CGO_FFLAGS_DISALLOW
CGO_LDFLAGS
CGO_LDFLAGS_ALLOW
CGO_LDFLAGS_DISALLOW
CXX
FC
GCCGO
GO111MODULE
GO386
GOAMD64
GOARCH
GOARM
GOARM64
GOBIN
GOCACHE
GOCACHEPROG
GOENV
GOEXE
GOEXPERIMENT
GOFLAGS
GOGCCFLAGS
GOHOSTARCH
GOHOSTOS
GOINSECURE
GOMIPS
GOMIPS64
GOMODCACHE
GONOPROXY
GONOSUMDB
GOOS
GOPATH
GOPPC64
GOPRIVATE
GOPROXY
GORISCV64
GOROOT
GOSUMDB
GOTMPDIR
GOTOOLCHAIN
GOTOOLDIR
GOVCS
GOWASM
GOWORK
GO_EXTLINK_ENABLED
PKG_CONFIG
`