I disabled the -j4 flag.
I don't understand why the -j4 flag works with Slackware and the stock
3.5.10 but not Trinity. Compiling KDE is slow enough already. :(
I tried again and the build failed. This time without the -j4 flag the
failure message referred to menutab_impl.cpp.
Attached is a log.
OK, same error, so I guess the -j4 flag was not the culprit.
I'll look further into it as I have time.
Tim