How to Call Functions from Shared Object Files in Go?

Calling Functions from Shared Object Files in Go

It's possible to call functions from static object (.so) files within Go programs. Contrary to the popular claim, the syscall.LoadLibrary function doesn't exist in the Go standard library. Instead, on POSIX platforms, you can leverage cgo to utilize the functions dlopen and friends.

Here's an example code snippet that illustrates how to achieve this:

<code class="go">
// #cgo LDFLAGS: -ldl
// #include <dlfcn.h>
import "C"

import fmt

func foo() {
    handle := C.dlopen(C.CString("libfoo.so"), C.RTLD_LAZY)
    bar := C.dlsym(handle, C.CString("bar"))
    fmt.Printf("bar is at %p\n", bar)
}
</dlfcn.h></code>

By using cgo and the appropriate system calls, you can load a shared object library and invoke its exported functions from within your Go program.

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