Gcc compiler Learning

Gcc compiler learning-general Linux technology-Linux programming and kernel information. The following is a detailed description. 1. Use gcc
Gcc compilation process:
1 preprocessing
The-E parameter allows gcc to stop the compilation process after preprocessing.
Gcc-E hello. c-o hello. I
2 compile
Use the-c parameter to compile the pre-processed source file into the target code.
Gcc-c hello. I-o hello. o
3 links
Link the generated target code to the class execution file.
Gcc hello. o-o hello

Ii. gcc warning function
Use the-Wall parameter to generate as many warnings as possible for gcc.
Gcc-Wall hello. c-o hello
Use the-Werror parameter to make gcc treat warnings as error handling.
Gcc-Werror hello. c-o hello

Iii. Library dependency
You can use the-I parameter to add a new directory to the gcc header file search path.
Gcc hello. c-I/home/wuzhiguo/include-o hello
You can use the-L parameter to add a new directory to the gcc library file search path.
Gcc hello. c-L/home/wuzhiguo/lib-l mylib-o hello
-L mylib indicates gcc to link the library file libmylib. so. The library files in Linux have a convention that all begin with lib, so you can save lib.
Dynamic library: End of. so, loaded at runtime.
Static Library: End of. a, which is loaded at compilation.
By default, gcc preferentially loads the dynamic library. You can use the-static option to force the static Link Library.
Gcc hello. c-L/home/wuzhiguo/lib-static-l mylib-o hello