Trying to install Regina REXX 3.5 (already on 3.4). Running ./configure with --enable-64bit switch returns in error message that this is not supported on an 32bit Operating System. SLES11 runs on s390x which is 64bit.
Seems that s390x is not considered to be a 64bit operating system. This is incorrect.
Solution: add "$mach" = "s390x" at Determine if the platform can handle 64bit binaries in file common/inclibarch.m4