writing system call issues

Hi,

I am porting some of my kernel code from i86 to ia-64 platform. When I try
to compile the user level code which involves _syscallX macros, it gives
an error "undefined reference to __ia64_syscall".

I understand that the problem is with glibc which doesn't export
__ia64_syscall for some reason. I would like to know what are the fixes
available for this. I prefer not to use "syscall" interface.

Thanks
Amit