I see the following failure on i386-linux and powerpc-linux
Matthias
/scratch/packages/gcc/4.3/gcc-4.3-4.3-20080206/build/./prev-gcc/xgcc -B/scratch/packages/gcc/4.3/gcc-4.3-4.3-20080206/build/./prev-gcc/ -B/usr/i486-linux-gnu/bin/ -c -g -O2 -fomit-frame-pointer -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -DOBJCPLUS -I../../src/gcc/objc -I../../src/gcc/cp -DHAVE_CONFIG_H -I. -Iobjcp -I../../src/gcc -I../../src/gcc/objcp -I../../src/gcc/../include -I../../src/gcc/../libcpp/include -I../../src/gcc/../libdecnumber -I../../src/gcc/../libdecnumber/bid -I../libdecnumber ../../src/gcc/objcp/objcp-decl.c -o objcp/objcp-decl.o
cc1: warnings being treated as errors
../../src/gcc/objcp/objcp-decl.c: In function 'objcp_comptypes':
../../src/gcc/objcp/objcp-decl.c:98: error: implicit declaration of function 'comptypes'
make[5]: *** [objcp/objcp-decl.o] Error 1
make[5]: *** Waiting for unfinished jobs....