Linux Basics: Static Libraries vs. Dynamic Libraries

Erika Caoili
Dec 17, 2019 · 4 min read

You came to the right place if you’re wondering how static and dynamic libraries work in C programs. You must be thinking…

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Photo by Edwin Andrade on Unsplash

A Library in Linux

“For instance, if you are building an application that needs to perform math operations, you don’t have to create a new math function for that, you can simply use existing functions in libraries for that programming language.” (“Understanding Shared Libraries In Linux”)

Differences Between Dynamic and Static Libraries

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Dynamic libraries have a “*.so” naming convention and static libraries have an “*.a”.

Advantages and Disadvantages of Dynamic Libraries

Advantages and Disadvantages of Static Libraries

#include "<header file name>"

Dynamic Libraries

gcc -g -fPIC -Wall -Werror -Wextra -pedantic *.c -shared -o liball.so
export LD_LIBRARY_PATH=.:$LD_LIBRARY_PATH
gcc -g -wall -o app app.c liball.so

Static Libraries

ar rc liball.a dog.o cat.o bird.o
ranlib liball.a
gcc main.c -L -l<filename>

Resources:

How to create Static library and Use it in Linux

What is difference between Dynamic and Static library(Static and Dynamic linking)

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