gcc42

Hallo,
I committed some changes to wip/gcc42 that bring support for gcc42.
There is an issue however in -current with wip/gcc42 but also with
lang/gcc34.
E.g. I was not able to bring compilation up to the end automatically;
the problem is with work/obj/prev-gcc/stddef.h created by gcc; this
should be an ansified version of /usr/include/stddef.h but is instead
missing several declarations.
rm work/obj/prev-gcc/include/stddef.h && make
works fine.
How to best cope with this problem?
Package obtained works otherwise fine. I used gfortran to compile a
huge code featuring most oddities.
Fulvio

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