How Can I Build DLLs with Go on Windows?

Building DLLs with Go 1.7 Under Windows

While trying to compile a DLL using Go 1.7 on Windows, you may encounter the error message "-buildmode=shared not supported on windows/amd64". This is because the -buildmode=shared flag is not available for Windows systems in Go versions prior to 1.10.

Solution in Go 1.10 and Later

With the release of Go 1.10, the -buildmode=c-shared flag has been introduced, allowing for DLL compilation on Windows. To build a DLL, simply use the following command:

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

Header Compatibility

The headers generated by Go are primarily compatible with GCC. However, if your DLL exposes only C-type data, this should not pose a significant issue. For instance, LoadLibrary can be used in Visual Studio without the header.

Legacy Solution

If you need to build DLLs with Go versions prior to 1.10, you can refer to the discussion thread on the Go Developer Forum linked in the original post for alternative solutions.

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