You Asked: How Does Shared Library Work in Linux?

Shared Libraries are the libraries that can be linked to any program at run-time. They provide a means to use code that can be loaded anywhere in the memory. Once loaded, the shared library code can be used by any number of programs.

How do I create a shared library in Linux?

Example with code:

1. Compile the library functions: gcc -Wall -fPIC -c ctest1.c ctest2.c.
2. Generate the shared library: gcc -shared -Wl,-soname,libctest.so.1 -o libctest.so.1.0 ctest1.o ctest2.o. …
3. Move to lib/ directory: …
4. Configure the library path (see below and choose one of three mechanisms). …
5. Run the program: ./prog Valx=5.

How are shared library files used?

A shared library is a file containing object code that several a. out files may use simultaneously while executing. When a program is link edited with a shared library, the library code that defines the program’s external references is not copied into the program’s object file.