Hi Andreas,
It still works, that's what fixincludes is for. If that does not work
for you then this is a different bug.
My understanding is that fixincludes is automatically run these days.
So all I did was run
configure --prefix=/usr/local/gnu --enable-languages=c,c++ \
&& make \
&& make install
(Well, after unpacking mpfr, and being grateful that they support having
mpfr in the source tree.)
The only wchar.h I see that got installed is
/usr/local/gnu/include/c++/4.4.2/tr1/wchar.h, which is presumably
irrelevant to C compilation.
I guess I can double-check and then try to report that bug.
BTW, this is on CentOS 5.4 = RHEL whatever.
gcc version 4.1.2 20080704 (Red Hat 4.1.2-46)
Thanks,
Karl