Robert P. J. DAY says:

Based on feedback from Mike Frysinger, add the following patchset for
glibc-2.7. Not stress-tested, but at least make it available for
interested testers.

 # Compute IA-64-specific values

 CT_DoArchValues() {

     # The architecture part of the tuple:

     CT_TARGET_ARCH="${CT_ARCH}"

 }