Building a dll with Go 1.7

Question

Is there a way to build a dll against Go v1.7 under Windows ?

I tried a classic

go build -buildmode=shared main.go

but get

-buildmode=shared not supported on windows/amd64

update Ok, I've got my answer. For those who are interested : https://groups.google.com/forum/#!topic/golang-dev/ckFZAZbnjzU

Answer 1

As of Go 1.10, -buildmode=c-shared is now supported on Windows.

Release notes: https://golang.org/doc/go1.10#compiler

So now compiling to DLL is a one-liner:

go build -o helloworld.dll -buildmode=c-shared

I believe the headers are only compatible with GCC. If you're only exposing C-types, this should not be a big issue. I was able to get LoadLibrary to work in Visual Studio without the header.

Answer 2

go build -buildmode=c-archive github.com/user/ExportHello

====> will build ExportHello.a, ExportHello.h

Take the functions built in ExportHello.a and re-export in Hello2.c

gcc -shared -pthread -o Hello2.dll Hello2.c ExportHello.a -lWinMM -lntdll -lWS2_32

====> will generate Hello2.dll