How Can I Easily Build a DLL in Go on Windows?

Building a DLL with Go Revisited

In the past, building a DLL with Go on Windows required additional steps and workarounds. However, with the release of Go 1.10, this process has become much more straightforward.

Problem

Previously, attempting to build a DLL using the -buildmode=shared flag resulted in an error indicating that it was not supported on Windows.

Solution

As of Go 1.10, a new flag, -buildmode=c-shared, has been introduced that allows for the compilation of DLLs on Windows.

The updated syntax to build a DLL is:

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

Note that the headers generated by this process are primarily compatible with GCC. If your DLL exposes only C-types, however, this should not be a significant concern. It has been demonstrated that LoadLibrary can be used successfully in Visual Studio even without the headers.

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