Missing mips-tfile dependency in 3.0 branch?

[Neil Booth <neil at daikokuya dot demon dot co dot uk>]

I'm trying to build a x86-mips cross compiler, configured as follows:-

../../gcc-branch/configure --enable-languages=c --prefix=/home/neil/cross
--target=mips-elf

I have already successfully built and installed binutils and gas for
this target.  I run into a problem near the start of stage 2, with the
following error:-

./xgcc -B./ -B/home/neil/cross/mips-elf/bin/ -isystem /home/neil/cross/mips-elf/include -O2  -DCROSS_COMPILE -DIN_GCC    -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -isystem ./include  -G 0 -g1  -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc -I. -I. -I../../../gcc-branch/gcc -I../../../gcc-branch/gcc/. -I../../../gcc-branch/gcc/config -I../../../gcc-branch/gcc/../include -DL_m16addsf3 -xassembler-with-cpp -c ../../../gcc-branch/gcc/config/mips/mips16.S -o libgcc/./_m16addsf3.o
xgcc: installation problem, cannot exec `mips-tfile': No such file or directory.

Sure enough, mips-tfile is a target in gcc/Makefile.in, but nothing
appears to depend on it.  Moreover, doing a make mips-tfile just results
in a flood of errors, since it includes a non-existent mips/a.out.h file.

I would try to fix this, but I don't understand GCC's makefiles
particularly well.

Is this a configuration problem, or a configury bug?

Thanks,

Neil.