Book Image

Extreme C

By : Kamran Amini
5 (1)
Book Image

Extreme C

5 (1)
By: Kamran Amini

Overview of this book

There’s a lot more to C than knowing the language syntax. The industry looks for developers with a rigorous, scientific understanding of the principles and practices. Extreme C will teach you to use C’s advanced low-level power to write effective, efficient systems. This intensive, practical guide will help you become an expert C programmer. Building on your existing C knowledge, you will master preprocessor directives, macros, conditional compilation, pointers, and much more. You will gain new insight into algorithm design, functions, and structures. You will discover how C helps you squeeze maximum performance out of critical, resource-constrained applications. C still plays a critical role in 21st-century programming, remaining the core language for precision engineering, aviations, space research, and more. This book shows how C works with Unix, how to implement OO principles in C, and fully covers multi-processing. In Extreme C, Amini encourages you to think, question, apply, and experiment for yourself. The book is essential for anybody who wants to take their C to the next level.
Table of Contents (23 chapters)

Executable Object Files

Now, it's time to talk about executable object files. You should know by now that executable object file is one of the final products of a C project. Like relocatable object files, they have the same items in the:; the machine-level instructions, the values for initialized global variables, and the symbol tabl;t however, the arrangement can be different. We can show this regarding the ELF executable object files since it would be easy to generate them and study their internal structure.

In order to produce an executable ELF object file, we continue with example 3.1. In the previous section, we generated relocatable object files for the two sources existing in the example, and in this section, we are going to link them to form an executable file.

The following commands do that for you, as explained in the previous chapter:

$ gcc funcs.o main.o -o ex3_1.out
$ 

Shell Box 3-5: Linking previously built relocatable object files in example 3.1

In...