build: bootstrap build of go fails on windows amd64

[lovettchris]

What version of Go are you using (go version)?

$ go version
go version go1.4 windows/amd64

Does this issue reproduce with the latest release?

trying to use the go bootstrap version 1.4 (as per https://golang.org/doc/install/source) to build the latest go sources. But it fails.

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
set GOARCH=amd64
set GOBIN=
set GOCHAR=6
set GOEXE=.exe
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=
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

What did you do?

Downloaded and unpacked go1.4.windows-amd64.zip to c:\go
set GOROOT_BOOTSTRAP=c:\go
set GOROOT_FINAL=d:\go
cloned the latest github.com/golang/go
cd src
all.bat

What did you expect to see?

Successful build of the new version of go.

What did you see instead?

d:\git\golang\go\src>all.bat
Building Go cmd/dist using c:\go
Building Go toolchain1 using c:\go.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
Building packages and commands for windows/amd64.
// runtime/cgo
gcc_libinit_windows.c: In function 'x_cgo_sys_thread_create':
gcc_libinit_windows.c:57:12: error: implicit declaration of function '_beginthread'; did you mean 'OpenThread'? [-Werror=implicit-function-declaration]
thandle = _beginthread(func, 0, arg);
^~~~~~~~~~~~
OpenThread
cc1: all warnings being treated as errors
go: failed to remove work dir: GetFileInformationByHandle C:\Users\Chris\AppData\Local\Temp\go-build549624342\NUL: Incorrect function.
go tool dist: FAILED: d:\git\golang\go\pkg\tool\windows_amd64\go_bootstrap install -gcflags=all= -ldflags=all= std cmd: exit status 2
The system cannot find the batch label specified - fail
go: failed to remove work dir: GetFileInformationByHandle C:\Users\Chris\AppData\Local\Temp\go-build900619142\NUL: Incorrect function.

[ALTree]

This is caused by the the gcc toolchain you are using.

What is it?

[ianlancetaylor]

Anyone know if _beginthread is declared in any standard Windows header file?

[ALTree]

Win docs say <process.h>

[ianlancetaylor]

Hmmm, we already #include <process.h> in runtime/cgo/gcc_libinit_windows.c.

[ALTree]

I don't know if this is useful, but I've seen that error in the past when trying to build from source on windows with a cygwin gcc (which anyway is not officially supported for bootstrapping Go on windows)

[bradfitz]

See also all the related conversation in #35006.

This might even be a dup.

[alexbrainman]

See also all the related conversation in #35006.

I agree #35006 (comment) might help.

@lovettchris download http://musl.cc/x86_64-w64-mingw32-native.zip, unzip it anywhere, add bin subdirectory to your PATH, and try again.

You can also

set CGO_ENABLED=0

and that will build Go without any gcc installed. You won't be able to do Cgo, if you do that.

Thank you.

Alex

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