Gprolog on amd64

Hello all,

I am interested in Prolog, and would like to run it on a Linux AMD64 machine.

I tried running ./configure with various build parameters:
i386-pc-linux, i586-pc-linux, etc, but running make exits with:

make[1]: Entering directory `/root/gprolog-1.2.16/src/EnginePl'
gplc -c -C '-O3 ' obj_begin.c
`-mcpu=' is deprecated. Use `-mtune=' or '-march=' instead.
obj_begin.c:1: error: CPU you selected does not support x86-64 instruction set
compilation failed
make[1]: *** [obj_begin.o] Error 1
make[1]: Leaving directory `/root/gprolog-1.2.16/src/EnginePl'
make: *** [all] Error 1


I read PORTING in src/, but I'm afraid it doesn't mean anything to me.
I would help with testing however.


Calum