help for doubts(gcc)

help for doubts(gcc)

[dennis jacob]

Hello Sir,
  I'm a beginner in gcc and have some doubts.Please clear.
      As part of my project, I have to develop a small kernel and 
I have selected gcc and the associated tools for this purpose.  In 
some kernels,  I have seen assembly routines been written in nasm 
and C programs in gcc.
I want to compile both with nasm and gcc respectively. The problem 
is I want to link these elf objs to obtain a single large elf 
file.
   Please suggest the syntax for the command line switch to 
compile a C program to obtain a elf output.Can I specify the name 
of the output file? Also specify the ld option to link more than 
one elf file to obtain a big elf file.
       Another doubt is about how to write a linker script for elf 
output. I have seen them in several kernels but have'nt understood 
yet.
     How should I specify my new linker script. In the info page 
it is written that the option -t may be used. Is it necessary that 
the script file must have a specific extension? Let me say my idea 
for using this. First use "ld -T scriptfilename" as command line. 
Then use the ld option to link all the elf objs. Also, how can I 
specify the name of the output file?
 				Thanking You
 					Dennis Jacob M.
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