This code contains calls to setjmp. The setjmp call changes at
gcc for linux version 2.2.2d. So:

if you have GCC2.2.2:
    gcc -s -o puzzle puzzle222.a -lXext -lX11

if you have GCC2.2.2d or newer:
    gcc -s -o puzzle puzzle222d.a -lXext -lX11


Rob Hooft (hooft@hutruu54.bitnet, hooft@chem.ruu.nl)
