I think revision 194665 breaks bootstrap on at least x86_64-apple-darwin10:
g++ -c -g -DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H -DGENERATOR_FILE -I. -Ibuild -I../../_clean/gcc -I../../_clean/gcc/build -I../../_clean/gcc/../include -I./../intl -I../../_clean/gcc/../libcpp/include -I/opt/mp/include -I../../_clean/gcc/../libdecnumber -I../../_clean/gcc/../libdecnumber/dpd -I../libdecnumber -I../../_clean/gcc/../libbacktrace -DCLOOG_INT_GMP -I/opt/mp/include \ -o build/genconstants.o ../../_clean/gcc/genconstants.c In file included from ./bconfig.h:3:0, from ../../_clean/gcc/genconstants.c:28: ./auto-host.h:1994:16: error: declaration does not declare anything [-fpermissive] #define rlim_t long ^ In file included from ../../_clean/gcc/genconstants.c:29:0: ../../_clean/gcc/system.h:502:34: error: declaration of C function 'const char* strsignal(int)' conflicts with extern const char *strsignal (int); ^ In file included from /opt/gcc/gcc4.8a/include/c++/4.8.0/cstring:44:0, from ../../_clean/gcc/system.h:207, from ../../_clean/gcc/genconstants.c:29: /usr/include/string.h:136:7: error: previous declaration 'char* strsignal(int)' here char *strsignal(int sig); ^ TIA Dominique