http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53964
--- Comment #6 from Anton Shterenlikht <mexas at bristol dot ac.uk> 2012-09-05 08:44:00 UTC --- on 4.7 the error is slightly different: gmake[3]: Entering directory `/usr/ports/lang/gcc47/work/build/libcpp' /usr/ports/lang/gcc47/work/build/./prev-gcc/g++ -B/usr/ports/lang/gcc47/work/build/./prev-gcc/ -B/usr/local/sparc64-portbld-freebsd10.0/bin/ -nostdinc++ -B/usr/ports/lang/gcc47/work/build/prev-sparc64-portbld-freebsd10.0/libstdc++-v3/src/.libs -B/usr/ports/lang/gcc47/work/build/prev-sparc64-portbld-freebsd10.0/libstdc++-v3/libsupc++/.libs -I/usr/ports/lang/gcc47/work/build/prev-sparc64-portbld-freebsd10.0/libstdc++-v3/include/sparc64-portbld-freebsd10.0 -I/usr/ports/lang/gcc47/work/build/prev-sparc64-portbld-freebsd10.0/libstdc++-v3/include -I/usr/ports/lang/gcc47/work/gcc-4.7-20120825/libstdc++-v3/libsupc++ -L/usr/ports/lang/gcc47/work/build/prev-sparc64-portbld-freebsd10.0/libstdc++-v3/src/.libs -L/usr/ports/lang/gcc47/work/build/prev-sparc64-portbld-freebsd10.0/libstdc++-v3/libsupc++/.libs -I.././../gcc-4.7-20120825/libcpp -I. -I.././../gcc-4.7-20120825/libcpp/../include -I.././../gcc-4.7-20120825/libcpp/include -g -O2 -gtoggle -W -Wall -Wno-narrowing -Wwrite-strings -Wmissing-format-attribute -pedantic -Wno-long-long -fno-exceptions -fno-rtti -I.././../gcc-4.7-20120825/libcpp -I. -I.././../gcc-4.7-20120825/libcpp/../include -I.././../gcc-4.7-20120825/libcpp/include -c -o charset.o -MT charset.o -MMD -MP -MF .deps/charset.Tpo .././../gcc-4.7-20120825/libcpp/charset.c In file included from .././../gcc-4.7-20120825/libcpp/system.h:30:0, from .././../gcc-4.7-20120825/libcpp/charset.c:22: /usr/ports/lang/gcc47/work/build/./prev-gcc/include/stddef.h:150:26: error: multiple types in one declaration /usr/ports/lang/gcc47/work/build/./prev-gcc/include/stddef.h:150:26: error: declaration does not declare anything [-fpermissive]