It seems that there is no longer a 32 bit ABI in the Unix Design Guide for IA64, only a 64 bit one. Is anyone still doing a 32 bit ABI, and if so, can we discuss C/C++ layout for that? I have heard that Linux/IA64 and Solaris/IA64 don't support a 32 bit IA-64 ABI, only a 32 bit IA-32 ABI. Can anyone confirm this? Mark