go env命令¶

格式:

$ usage: go env [-json] [var ...]

一般环境变量¶

$GOFILE:        当前处理中的文件名
$GOLINE:        当前命令在文件中的行号
$GOPACKAGE:     当前处理文件的包名
$DOLLAR:        固定的"$"(不清楚用途)

$GOARCH:        体系架构 (arm、amd64等待)
  The architecture, or processor, for which to compile code.
  Examples are amd64, 386, arm, ppc64.
$GOOS:          OS环境(linux、windows等)
  The operating system for which to compile code.
  Examples are linux, darwin, windows, netbsd.

GCCGO
  The gccgo command to run for 'go build -compiler=gccgo'.
GOBIN
  The directory where 'go install' will install a command.
GOCACHE
  The directory where the go command will store cached
  information for reuse in future builds.
GODEBUG
  Enable various debugging facilities. See 'go doc runtime'
  for details.
GOENV
  The location of the Go environment configuration file.
  Cannot be set using 'go env -w'.
GOFLAGS
  A space-separated list of -flag=value settings to apply
  to go commands by default, when the given flag is known by
  the current command. Each entry must be a standalone flag.
  Because the entries are space-separated, flag values must
  not contain spaces. Flags listed on the command line
  are applied after this list and therefore override it.
GOPATH
  For more details see: 'go help gopath'.
GOPROXY
  URL of Go module proxy. See 'go help modules'.
GOPRIVATE, GONOPROXY, GONOSUMDB
  Comma-separated list of glob patterns (in the syntax of Go's path.Match)
  of module path prefixes that should always be fetched directly
  or that should not be compared against the checksum database.
  See 'go help module-private'.
GOROOT
  The root of the go tree.
GOSUMDB
  The name of checksum database to use and optionally its public key and
  URL. See 'go help module-auth'.
GOTMPDIR
  The directory where the go command will write
  temporary source files, packages, and binaries.

cgo用到的环境变量¶

AR
  The command to use to manipulate library archives when
  building with the gccgo compiler.
  The default is 'ar'.
CC
  The command to use to compile C code.
CGO_ENABLED
  Whether the cgo command is supported. Either 0 or 1.
CGO_CFLAGS
  Flags that cgo will pass to the compiler when compiling
  C code.
CGO_CFLAGS_ALLOW
  A regular expression specifying additional flags to allow
  to appear in #cgo CFLAGS source code directives.
  Does not apply to the CGO_CFLAGS environment variable.
CGO_CFLAGS_DISALLOW
  A regular expression specifying flags that must be disallowed
  from appearing in #cgo CFLAGS source code directives.
  Does not apply to the CGO_CFLAGS environment variable.
CGO_CPPFLAGS, CGO_CPPFLAGS_ALLOW, CGO_CPPFLAGS_DISALLOW
  Like CGO_CFLAGS, CGO_CFLAGS_ALLOW, and CGO_CFLAGS_DISALLOW,
  but for the C preprocessor.
CGO_CXXFLAGS, CGO_CXXFLAGS_ALLOW, CGO_CXXFLAGS_DISALLOW
  Like CGO_CFLAGS, CGO_CFLAGS_ALLOW, and CGO_CFLAGS_DISALLOW,
  but for the C++ compiler.
CGO_FFLAGS, CGO_FFLAGS_ALLOW, CGO_FFLAGS_DISALLOW
  Like CGO_CFLAGS, CGO_CFLAGS_ALLOW, and CGO_CFLAGS_DISALLOW,
  but for the Fortran compiler.
CGO_LDFLAGS, CGO_LDFLAGS_ALLOW, CGO_LDFLAGS_DISALLOW
  Like CGO_CFLAGS, CGO_CFLAGS_ALLOW, and CGO_CFLAGS_DISALLOW,
  but for the linker.
CXX
  The command to use to compile C++ code.
FC
  The command to use to compile Fortran code.
PKG_CONFIG
  Path to pkg-config tool.

Architecture-specific的环境变量¶

GOARM
  For GOARCH=arm, the ARM architecture for which to compile.
  Valid values are 5, 6, 7.
GO386
  For GOARCH=386, the floating point instruction set.
  Valid values are 387, sse2.
GOMIPS
  For GOARCH=mips{,le}, whether to use floating point instructions.
  Valid values are hardfloat (default), softfloat.
GOMIPS64
  For GOARCH=mips64{,le}, whether to use floating point instructions.
  Valid values are hardfloat (default), softfloat.
GOWASM
  For GOARCH=wasm, comma-separated list of experimental WebAssembly features to use.
  Valid values are satconv, signext.

Special-purpose¶

GCCGOTOOLDIR
  If set, where to find gccgo tools, such as cgo.
  The default is based on how gccgo was configured.
GOROOT_FINAL
  The root of the installed Go tree, when it is
  installed in a location other than where it is built.
  File names in stack traces are rewritten from GOROOT to
  GOROOT_FINAL.
GO_EXTLINK_ENABLED
  Whether the linker should use external linking mode
  when using -linkmode=auto with code that uses cgo.
  Set to 0 to disable external linking mode, 1 to enable it.
GIT_ALLOW_PROTOCOL
  Defined by Git. A colon-separated list of schemes that are allowed
  to be used with git fetch/clone. If set, any scheme not explicitly
  mentioned will be considered insecure by 'go get'.
  Because the variable is defined by Git, the default value cannot
  be set using 'go env -w'.

其他¶

GOEXE
  The executable file name suffix (".exe" on Windows, "" on other systems).
GOGCCFLAGS
  A space-separated list of arguments supplied to the CC command.
GOHOSTARCH
  The architecture (GOARCH) of the Go toolchain binaries.
GOHOSTOS
  The operating system (GOOS) of the Go toolchain binaries.
GOMOD
  The absolute path to the go.mod of the main module,
  or the empty string if not using modules.
GOTOOLDIR
  The directory where the go tools (compile, cover, doc, etc...) are installed.

GOOS指的是目标操作系统:

darwin
freebsd
linux
windows
android
dragonfly
netbsd
openbsd
plan9
solaris

GOARCH指的是目标处理器的架构，目前支持的有:

arm
arm64
386
amd64
ppc64
ppc64le
mips64
mips64le
s390x