Building GCC for 64-bit architecture

[Andrew Haley]

arpit jain writes:
 > Hiiii,
 > 
 > I want to build GCC for a 64-bit
 > architecture(AMD-Opteron, IBM Power5 Series).
 > 
 > 1.Can anyone suggest from which version GCC supports
 > 64bit architecture?

Ages ago.  3.3, I think.  You can find out by looking at http://gcc.gnu.org/releases.html

 > 2.What all options I need to give during the
 > configure?

What host architecture will you be using?

Andrew.