3

I am writing a Go app that calls into a Windows DLL. The DLL was written with MSVC and has extern "C" exports using __declspec(dllexport).

The top of my Go app is as follows:

//#cgo CFLAGS: -IC:/Repos/Module/include
//#cgo LDFLAGS: -L. C:/Repos/Module/go/bin/MyModule.dll
//#include <MyModule.h>
import "C"

I'm calling functions from the module like so:

nRet := C.moduleImpl_len()

The problem is that when I try to run this app, I get the following error:

C:\Users\MINDO~1\AppData\Local\Temp\go-build836751819\mod\modimpl\_obj\modimpl.cgo2.o: In function `_cgo_e2aaf076ab69_Cfunc_moduleImpl_len':
C:/Repos/Module/go/src/mod/modimpl/modimpl.go:90: undefined reference to `moduleImpl_len'

I looked at the DLL exported symbols with DUMPBIN and it showed exactly "moduleImpl_len" as the exported symbol. This is also the symbol as defined in MyModule.h.

Any suggestions on how I can get the symbols to link without having to go the syscall route?

Askable
  • 245
  • 3
  • 10
  • That was a typo on my part when creating the question. My code was correct (a single colon). Now corrected in the question text. – Askable Jan 09 '15 at 20:28
  • This was the correct answer. Why don't you put it in an answer and I'll give you credit. Thx! – Askable Jan 30 '15 at 23:22

1 Answers1

2

If you're trying to link against the dll you need/want "-lMyModule" in the LDFLAGS? https://stackoverflow.com/a/15853231/32453

Community
  • 1
  • 1
rogerdpack
  • 56,766
  • 33
  • 241
  • 361