In the last episode (Mar 25), David Hedbor @ Pike developers forum said:
Of course, none of that matters since backend is also a cmod...
I guess it's impossible to compile pike without pike and thus I suggest that post_modules is deprecated since they no longer have a purpose.
Hasn't it always been impossible to compile CVS pike without pike (or autoconf for that matter)? Snapshots and releases are a different story, since the pike-generated files are included.