GCC Options –i,-l,-l

-I: Specifies the first directory to look for header files

-L: Specifies the first directory to look for library files

-L: Indicates that a specified dynamic library file is found in the library file directory

Cases:

Gcc–o Hello Hello.c–i/home/hello/include–l/home/hello/lib–lworld

/home/hello/include as the search directory for the first header file. Header file Search Order:/home/hello/include–>/usr/include–> usr/local/include

/home/hello/lib as the search directory for the first library file. The search order of library files:/home/hello/lib–>/lib–>/usr/lib–>/usr/local/lib

-lworld means looking for libworld.so's dynamic library file in the library file path

GCC Options –i,-l,-l