Building and using the--linux compiler in the Linux development environment GCC

In the previous section we learned about the Vim editor, and then we learned about the GCC compiler together, where do we differentiate between editors and compilers?

Editor is that I use it to write programs (edit code), and we write code statements, the computer is not understand, we need to turn it into a computer can understand the statement, the compiler is such a conversion tool. That is, we use the editor to write programs, compiled by the compiler to run !

compilers are programs that translate advanced computer languages that are easy to write, read, and maintain into low-level machine languages that computers can interpret and run.

GCC (GNU Compiler Collection,gnu Compiler Suite), a programming language compiler developed by GNU. As the official compiler for the GNU operating system, GCC has now been adopted as a standard compiler for most Unix-like operating systems (such as Linux, BSD, Mac OS X, etc.), and GCC is also applicable to Microsoft Windows.

GCC was originally used to compile the C language, and with the development of the project GCC has become a compiler that can compile the C, C + +, Java, Ada, Fortran, object C, Object + C, Go languages.

this is just Simple Introduction how to compile C programs or C + + programs to eventually become an executable program .

GCC recognizes the following file name extensions :

. C C language files

. I pre-preprocessed C language files

. C,. CC,. CP,. cpp,. C + +,. cxx C + + language files

. II C + + language files after preprocessing

. S assembly file (user's own new assembly file)

. s pre-processing assembly files

. o the compiled target file

. A static link library for target files (used when linking)

dynamic-link libraries for. So target files (link, run-time use)

Compilation process for GCC and g++ compilers

1. pretreatment

2. Compiling

3. Compilation

4. Links

GCC Common Compilation Application Example

Step into the compilation:

1) gcc-e Hello.c-o hello.i
2) gcc-s Hello.i-o Hello.s
3) gcc-c Hello.s-o hello.o
4) GCC Hello.o-o hello_elf

description of the compilation options :

-O file specifies that the generated output file is named file

-e only for preprocessing

-S only for preprocessing and compiling

-C only preprocess, compile, and assemble

filename suffix Description :

. C C language Files

. I Pre-preprocessed C language files

. s pre-processing assembly files

. o the compiled target file

After the program compiles successfully, run the executable program through "./".

Common compilations (or processes that are pre-processed, compiled, compiled, linked):

GCC Hello.c-o Demo

In the case of C + + code, simply use the g++ compiler instead.

If you do not have a g++ compiler, you can install it online:

Compile the C + + program using g++ :

Some other options for GCC, g++ compilation

- v Displays the configuration command when making the GCC tool, showing the preprocessor, the compiler version number

-wall generate warning messages for all levels
- W turn off all warnings, we recommend that you do not use this option

-idir The dir directory is added to the header file to search the directory list, preferably in the Dir directory to find the included header file

-ldir Add dir directory to library file directory list, first find library file in dir directory

-lname Library with link library as name

-static use static libraries when linking

-shared compiling a dynamic library

Please click here to download the example code for use.

Building and using the--linux compiler in the Linux development environment GCC