gcc library and linker documentation

[Joseph Jolic]

Hi
I am a beginner with gcc and am having difficulty finding certain information 
on programming with gcc, such as:

-how to search and get relevant documentation for using certain functions

-I'm unclear as to when I would need to use the L option to specify libraries 
on the command line.  I'm used to specifying libraries through #include 
statements only.

Do you know of any tutorials on the internet that would cover these kinds of 
fundamentals.

Thank you.

Joseph Jolic