This Library is a Hidden Gem

Explores libffi, a library that enables calling functions in dynamic libraries without knowing their signatures at compile time. Demonstrates loading shared objects with dlopen/dlsym, explains the challenge of passing arbitrary arguments across different ABIs (Application Binary Interfaces), and shows how libffi solves this by providing a cross-platform abstraction. Includes a practical example building a simple REPL that dynamically calls functions from loaded libraries by constructing function signatures at runtime.