compiling many .c files in to one .o file
 

Hi,

I want to compile more than one source files (.c files) in to a single object file (.o) file. i am using gcc compiler version

To do that you will need make a "Makefile" which is basicaly instructions to tell the computer how to compile a program.

Here are a few tutorials...
http://vertigo.hsrl.rutgers.edu/ug/make_help.html
http://www.opussoftware.com/tutorial/TutMakefile.htm
http://www.gnu.org/software/make/

also...
www.google.com/linux

You don't necessarily need a make-file. You can just tell gcc to use multiple source files like so:

gcc -o out.obj file1.c file2.c file3.c