False alarm unless you, like me, use mac ports. The problem turned out to be caused by the mac ports version of 'file' (required by their port of subversion). For a unix executable foo it outputs
foo: Mach-O 64-bit executable rather than the expected (by common/autoconf/build-aux/autoconf-config.guess) value: foo: Mach-O 64-bit executable x86_64 I've now put mac ports at the end of my command path. Be warned that it installs itself at the head of the command path so it's versions of commands will replace the MacOS built-in versions. Mike
