Perl 5.003_05 compiles on DYNIX/ptx 4.0 (v4.1.3), and passes all tests.
The only change needed is in "ext/NDBM_File/Makefile.PL" - on this system,
ndbm is actually contained in the libc library, and must be linked against
-lc when compiling. (this is for dynamic ELF executables, I didn't compile
statically)
--- /dev/null
+# On DYNIX/ptx 4.0 (v4.1.3), ndbm is actually contained in the
+# libc library, and must be explicitly linked against -lc when compiling.
+$self->{LIBS} = ['-lc'];