Ned Deily <> added the comment:

Also note that, on current macOS systems, specifying just --enable-universalsdk 
to ./configure results in an implicit --with-universal-archs of intel (which 
implies both x86_64 and i386).

checking for --enable-universalsdk... /
checking for --with-universal-archs... intel

With macOS 10.15 Catalina and Xcode 11, i364 arch is no longer supported and 
that results in another cryptic ./configure failure:

checking size of size_t... configure: error: in `/Users/sysadmin/cpython':
configure: error: cannot compute sizeof (size_t)
See `config.log' for more details


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