It shows in config.log why exactly it thought they were working. Copy&paste those parts of it?
configure:23169: checking for strtoimax configure:23196: cc -c -g conftest.c >&5 configure:23202: $? = 0 configure:23213: result: yes configure:23228: checking for strtoumax configure:23255: cc -c -g conftest.c >&5 configure:23261: $? = 0 configure:23272: result: yes
I am running the bash shell and I have found where bash compiles in definitions for strtoimax and strtoumax. So, even if the shell is changed, the environmental variable for the shell is not. Could this be the problem?
Actually easiest way for you would probably to just remove the HAVE_STRTOIMAX and HAVE_STRTOUMAX from config.h.in and config.h without modifying compat.c at all.
Yes, this works, as well. At this point I realize that it is a system and/or shell problem and not a dovecot problem. Is there a work around (not that you need more work) or do I just need to remember to undefine these for the Tru64 systems that I still support?