http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55398
--- Comment #1 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-11-19 21:41:04 UTC --- This was with... ../gcc-4.8-20121119/configure --prefix=/sw --prefix=/sw/lib/gcc4.8 --mandir=/sw/share/man --infodir=/sw/lib/gcc4.8/info --enable-languages=c,c++,fortran,lto,objc,obj-c++,java --with-gmp=/sw --with-libiconv-prefix=/sw --with-isl=/sw --with-cloog=/sw --with-mpc=/sw --with-system-zlib --enable-checking=yes --x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib --program-suffix=-fsf-4.8 --disable-cloog-version-check --disable-isl-version-check I can bootstrap on x86_64-apple-darwin12 using FSF gcc 4.7.2 but not with Xcode 4.5.2's llvm-gcc compilers which fail from a different bug... llvm-g++-4.2 -g -DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common -DHAVE_CONFIG_H -DGENERATOR_FILE -o build/genautomata \ build/genautomata.o build/rtl.o build/read-rtl.o build/ggc-none.o build/vec.o build/min-insn-modes.o build/gensupport.o build/print-rtl.o build/read-md.o build/errors.o ../build-x86_64-apple-darwin12.2.0/libiberty/libiberty.a -lm build/genautomata ../../gcc-4.8-20121119/gcc/config/i386/i386.md \ insn-conditions.md > tmp-automata.c genautomata(20280) malloc: *** error for object 0xd108c512bc664: pointer being freed was not allocated *** set a breakpoint in malloc_error_break to debug /bin/sh: line 1: 20280 Abort trap: 6 build/genautomata ../../gcc-4.8-20121119/gcc/config/i386/i386.md insn-conditions.md > tmp-automata.c make[3]: *** [s-automata] Error 134 make[2]: *** [all-stage1-gcc] Error 2 make[1]: *** [stage1-bubble] Error 2 make: *** [all] Error 2