Rubinius build failure

➜  rake
(in /Users/haruki_zaemon/Projects/rubinius)
/Users/haruki_zaemon/.rvm/ruby-1.8.7-p174/bin/ruby vm/codegen/field_extract.rb vm/builtin/object.hpp vm/builtin/integer.hpp vm/builtin/executable.hpp vm/builtin/access_variable.hpp vm/builtin/fixnum.hpp vm/builtin/array.hpp vm/builtin/bignum.hpp vm/builtin/block_environment.hpp vm/builtin/bytearray.hpp vm/builtin/io.hpp vm/builtin/channel.hpp vm/builtin/module.hpp vm/builtin/class.hpp vm/builtin/compiledmethod.hpp vm/builtin/data.hpp vm/builtin/dir.hpp vm/builtin/exception.hpp vm/builtin/float.hpp vm/builtin/immediates.hpp vm/builtin/iseq.hpp vm/builtin/list.hpp vm/builtin/lookuptable.hpp vm/builtin/memorypointer.hpp vm/builtin/methodtable.hpp vm/builtin/nativefunction.hpp vm/builtin/regexp.hpp vm/builtin/selector.hpp vm/builtin/staticscope.hpp vm/builtin/sendsite.hpp vm/builtin/string.hpp vm/builtin/symbol.hpp vm/builtin/thread.hpp vm/builtin/tuple.hpp vm/builtin/compactlookuptable.hpp vm/builtin/time.hpp vm/builtin/taskprobe.hpp vm/builtin/nativemethod.hpp vm/builtin/system.hpp vm/builtin/autoload.hpp vm/builtin/machine_method.hpp vm/builtin/proc.hpp vm/builtin/variable_scope.hpp vm/builtin/location.hpp vm/builtin/capi_handle.hpp vm/builtin/global_cache_entry.hpp vm/builtin/weakref.hpp
CC vm/builtin/integer.cpp
gcc -Ivm/external_libs/libtommath -Ivm/external_libs/libgdtoa -Ivm/external_libs/onig -Ivm/external_libs/libffi/include -Ivm/external_libs/libbstring -Ivm/external_libs/libcchash -Ivm/external_libs/libmquark -Ivm/external_libs/libmpa -Ivm/external_libs/libltdl -Ivm/external_libs/libev -Ivm/test/cxxtest -Ivm -I. -Ivm/assembler -Ivm/assembler/udis86-1.7 -pipe -Wall -Wno-deprecated -DBASE_PATH=\"/Users/haruki_zaemon/Projects/rubinius\" -DRBA_PATH=\"/Users/haruki_zaemon/Projects/rubinius/runtime\" -mdynamic-no-pic -DHAS_EXECINFO -ggdb3 -O2 -Werror -DRBX_PROFILER -c -o vm/builtin/integer.o vm/builtin/integer.cpp 2>&1
cc1plus: warnings being treated as errors
vm/builtin/integer.cpp: In static member function ‘static rubinius::Integer* rubinius::Integer::from(rubinius::VM*, int)’:
vm/builtin/integer.cpp:35: warning: comparison is always false due to limited range of data type
vm/builtin/integer.cpp:35: warning: comparison is always false due to limited range of data type
vm/builtin/integer.cpp: In static member function ‘static rubinius::Integer* rubinius::Integer::from(rubinius::VM*, unsigned int)’:
vm/builtin/integer.cpp:45: warning: comparison is always false due to limited range of data type
rake aborted!
Command failed with status (1): [gcc -Ivm/external_libs/libtommath -Ivm/ext...]