Learning GCC
We must know that GCC contains a series of compilers which are useful for compiling programs written in C, C ++, Java and Objective C among others.
GCC was originally written as the compiler for the GNU operating system.
GCC has four stages Preprocessing, compilation, assembly and connection
- Preprocess: Generate .i file
The C language code is first preprocessed with the include “include” functions and performs a conditional compilation handling the declarations keeping the ones that meet the compilation conditions and removing the others.
- Compile:
In this process, the result of the preprocessing is taken and an assembly language file with an “.s” extension is generated; in this process the syntax is checked, paying attention to external functions and variables.
- Assemble:
After the compiler delivers the assembly file, it carries out a process for it to be translated into machine language and it is called an object file and its extension is “.o”
- Connect:
The file generated by the “.o” extension handler cannot be used directly. The process of converting the target file into a form that is finally usable is called binding. When using a library, library loading is handled at this stage.
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