How to Call Linux Shared Library Functions in Go?

Calling Linux Shared Library Functions in Go

In this question, a developer seeks assistance in calling functions from a shared object (.so) file within their Go code. The ctypes package in Python, which enables access to C functions, serves as the desired functionality.

Using cgo for Static Shared Library Loading

To call functions in a statically known shared library at compile time, one can employ the cgo package. Here's an example for accessing the bar() function from libfoo.so:

<code class="go">package example

// #cgo LDFLAGS: -lfoo
//

#include <foo.h>

import "C"

func main() {
    C.bar()
}</code>

Dynamic Shared Library Loading with cgo

Alternatively, cgo can facilitate access to shared objects dynamically loaded at runtime. One needs to utilize the functions dlopen(), dlsym(), and dlclose() to open the shared library, retrieve function addresses, and close the library. However, these functions are not natively supported by Go and require a C wrapper to implement the necessary logic.

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