The default make install on non-win32 excludes gpgsplit from installation. Is this intentional?
I would expect all available and maintained "tools", including gpgsplit, not to be excluded on any platform.
On Debian gpgsplit is packaged in gnupg-utils - i.e. the issue is resolved by the package maintainers. On ArchLinux there is no official alternative package that contains gpgsplit.
I found no other ticket or mention of why this would be excluded, and the commit that introduces the change, 53c636c4c6, was made in 2010 and only states "./autogen.sh --build-w32ce does now succeed."
Any reason not to remove the restriction and have gpgsplit re-introduced as part of the main package? This seems the right way to go (unless there's another reason for exclusion).