Second problem, it simply does not work. See attached log.
It fails over-all because -base cannot be compiled (and installed) due
to a missing ffcall and/or libffi installation.
The fact is that ffcall 1.8d IS installed:
[pascal@thalassa ffcall-1.8d]$ ls -l /usr/local/lib/lib*{call,tramp}*
-rw-r--r-- 1 2288 Oct 25 07:32 /usr/local/lib/libavcall.a
-rw-r--r-- 1 438 Oct 25 07:32 /usr/local/lib/libavcall.la
-rw-r--r-- 1 5304 Oct 25 07:32 /usr/local/lib/libcallback.a
-rw-r--r-- 1 444 Oct 25 07:32 /usr/local/lib/libcallback.la
-rw-r--r-- 1 1726 Oct 25 07:32 /usr/local/lib/libtrampoline.a
-rw-r--r-- 1 3722 Oct 25 07:32 /usr/local/lib/libvacall.a