Crate libloading

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Bindings around the platform’s dynamic library loading primitives with greatly improved memory safety.

Using this library allows the loading of dynamic libraries, also known as shared libraries, and the use of the functions and static variables they contain.

The libloading crate exposes a cross-platform interface to load a library and make use of its contents, but little is done to hide the differences in behaviour between platforms. The API documentation strives to document such differences as much as possible.

Platform-specific APIs are also available in the os module. These APIs are more flexible, but less safe.


Add the libloading library to your dependencies in Cargo.toml:

libloading = "0.8"


In your code, run the following:

fn call_dynamic() -> Result<u32, Box<dyn std::error::Error>> {
    unsafe {
        let lib = libloading::Library::new("/path/to/")?;
        let func: libloading::Symbol<unsafe extern fn() -> u32> = lib.get(b"my_func")?;

The compiler will ensure that the loaded function will not outlive the Library from which it comes, preventing the most common memory-safety issues.


  • The change log.
  • Unsafe but flexible platform-specific bindings to dynamic library loading facilities.




  • Converts a library name to a filename generally appropriate for use on the system.