英文:
Go looks for packages in wrong directory
问题
我已经使用Windows msi在我的机器上安装了Go，但是当我尝试运行一个简单的Hello World程序时，像这样：
go run hello.go
我得到了以下错误：
> hello.go:3:8: 无法在任何地方找到“fmt”包：
C:\Go\src\pkg\fmt (来自$GOROOT)
在GOROOT中确实找不到这个包，因为它安装在以下目录中：
C:\Go\src（缺少\pkg）
GOROOT被设置为C:\Go（自动设置），C\Go\bin被添加到PATH中。
我的GOPATH被设置为我的工作空间，但似乎没有改变任何东西。
如何修复这个问题？我应该将所有包复制到C:\Go\src\pkg中吗？
我做错了什么吗？
编辑
根据@Volker的要求，这是go env的输出：
set GOARCH=amd64
set GOBIN=
set GOCHAR=6
set GOEXE=.exe
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=D:\aage\gocode
set GORACE=
set GOROOT=C:\Go
set GOTOOLDIR=C:\Go\pkg\tool\windows_amd64
set CC=gcc
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0
set CXX=g++
set CGO_ENABLED=1
英文:
I've used the Windows msi to install Go on my machine, but when I try to run a trivial Hello World, like so:
go run hello.go
I get the following error:
> hello.go:3:8: cannot find package "fmt" in any of:
C:\Go\src\pkg\fmt (from $GOROOT)
In the GOROOT this package can indeed not be found, since it's installed in the following directory:
C:\Go\src (missing the \pkg)
GOROOT is set to C:\Go (automatically), C\Go\bin is added to the PATH
My GOPATH is set to my workspace, but that doesn't seem to change anything.
How can this be fixed? Should I copy all packages to C:\Go\src\pkg?
Did I do anything wrong?
EDIT
As requested by @Volker, here's the output of go env:
set GOARCH=amd64
set GOBIN=
set GOCHAR=6
set GOEXE=.exe
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=D:\aage\gocode
set GORACE=
set GOROOT=C:\Go
set GOTOOLDIR=C:\Go\pkg\tool\windows_amd64
set CC=gcc
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0
set CXX=g++
set CGO_ENABLED=1
答案1
得分: 2
请检查你的 %PATH%：我安装了多个 Go 版本，我看到：
%GOROOT%(1.3)\src\pkg中的fmt：C:\prgs\go\go1.3.2.windows-amd64\src\pkg\fmt\%GOROOT%(1.4)\src中的fmt：C:\prgs\go\go1.4.windows-amd64\src\fmt\
源代码已经重新组织。
请参阅 "Go 1.4 src/pkg → src"。
这意味着，如果你尝试使用 Go 1.3 进行编译，而 GOROOT 指向的是 Go 1.4 的安装目录，你可能会看到该错误。
如果这样还不行，请卸载并使用 go1.4.windows-amd64.zip 压缩包：将其解压到任意位置，将 GOROOT 指向它，添加 GOROOT/bin，然后一切应该正常工作。
英文:
Check your %PATH%: I have multiple go versions installed and I see:
fmtin%GOROOT%(1.3)\src\pkg:C:\prgs\go\go1.3.2.windows-amd64\src\pkg\fmt\fmtin%GOROOT%(1.4)\src:C:\prgs\go\go1.4.windows-amd64\src\fmt\
The sources have been reorganized.
See "Go 1.4 src/pkg → src".
That means you might see that error if you are trying to compile with a go 1.3 while GOROOT points to a Go1.4 installation.
If that doesn't work, uninstall, and use the go1.4.windows-amd64.zip archive: unzip it anywhere you want, point GOROOT to it, add GOROOT/bin and everything should work.
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