cmd/go: -buildmode=dll is still not working in Go 1.10

[muhammadmuzzammil1998]

I read this issue, #11058, and it says that will be fixed in Go1.10 but its not working in Go1.10rc1.
I ran this command:

go1.10rc1.exe build -buildmode=dll

What did you expect to see?

I expected to see a .dll for my program.

What did you see instead?

Output:

buildmode=dll not supported

My Go Version: go version go1.10rc1 windows/amd64

More info:

• I am building this program
• My Go1.10rc1 is not added to path, I am using full location, i.e., C:\Users\Muzzammil\go\src\golang.org\x\build\version\go1.10rc1\go1.10rc1.exe so full command is:

C:\Users\Muzzammil\go\src\golang.org\x\build\version\go1.10rc1\go1.10rc1.exe build -buildmode=dll

Thanks.

[AlexRouSg]

Where did you get buildmode=dll from? As far as I can tell the arg is still buildmode=c-shared

[muhammadmuzzammil1998]

@AlexRouSg
It's mentioned in the issue #11058, but it's not in Go help.

You can use go help buildmode to get this info:

[AlexRouSg]

I think you are mistaking a suggestion for the actual implementation. Nowhere is buildmode=dll mentioned as being added.

Even in that issue, they used buildmode=c-shared to create dlls.

[muhammadmuzzammil1998]

So, how do I make a DLL?

[AlexRouSg]

As I've said in both replies, use buildmode=c-shared

[muhammadmuzzammil1998]

I am getting this:

C:\Users\Muzzammil\sdk\go1.10rc1\pkg\tool\windows_amd64\link.exe: running gcc failed: exec: "gcc": executable file not found in %PATH%

[AlexRouSg]

You need to install mingw

For questions please use https://github.com/golang/go/wiki/Questions

[muhammadmuzzammil1998]

Now I am getting this:

C:\Users\Muzzammil\sdk\go1.10rc1\pkg\tool\windows_amd64\link.exe: running gcc failed: exit status 1
C:\Users\MUZZAM~1\AppData\Local\Temp\go-link-763910195\go.o: file not recognized: File format not recognized
collect2.exe: error: ld returned 1 exit status

[muhammadmuzzammil1998]

Thank you @AlexRouSg, I thought that -buildmode=dll was a thing.

[hank]

You need mingw-64. I just was able to link an amd64 DLL using that.

[muhammadmuzzammil1998]

Thanks @hank

[shyandsy]

@AlexRouSg
It only generate .a libray by buildmode=c-shared, and it can not be used in VC porject

any solution to build windows dll?

[shyandsy]

@muhammadmuzzammil1998
i suffered same issue, and I solved that by add GOPATH to system variable (was in user variables)