LC

Create and Use Shared Libraries

medium8/9

Understand and Visualize Process Memory Layout Understand and Apply Link-Time Optimizations (LTO)

Language

Compiler

2.0s Limit 256MB

Implementation

Implement shared library creation and usage.

Requirements:

Compile code as position-independent (PIC)
Create shared library (.so file)
Export and import symbols
Use library from main program
Handle library versioning
Implement dynamic loading (dlopen/dlsym)
Test with library functions

Why This Matters

Shared libraries are why your system has one glibc serving thousands of processes and why Debian can patch OpenSSL once instead of relinking everything — the tradeoff that made the Heartbleed fix deployable in hours. Building a .so with -fPIC and inspecting its GOT shows the machinery behind every language's native-extension system, from Python wheels to Node addons.

Hints

0 / 3 revealed

Validation Suite

main.c

Workspace 1.0