[Bug bootstrap/54834] New: bootstrap fails when building libbacktrace

["tobi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54834

             Bug #: 54834
           Summary: bootstrap fails when building libbacktrace
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: tobi@gcc.gnu.org
            Target: x86_64-apple-darwin11.4.0


Created attachment 28371
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28371
configure log

The failure mode is copied below.  I attach my libbacktrace/config.log.

make  all-am
/bin/sh ./libtool --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I.
-I../../libbacktrace  -I ../../libbacktrace/../include -I
../../libbacktrace/../libgcc -I ../libgcc -I ../gcc/include -I
../../gcc/include  -funwind-tables -W -Wall -Wwrite-strings -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition -Wmissing-format-attribute
-Wcast-qual -Werror  -g -c -o backtrace.lo ../../libbacktrace/backtrace.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I../../libbacktrace -I
../../libbacktrace/../include -I ../../libbacktrace/../libgcc -I ../libgcc -I
../gcc/include -I ../../gcc/include -funwind-tables -W -Wall -Wwrite-strings
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
-Wmissing-format-attribute -Wcast-qual -Werror -g -c
../../libbacktrace/backtrace.c -o backtrace.o
In file included from ../../libbacktrace/backtrace.c:35:
../gcc/include/unwind.h:48: error: unknown machine mode 'unwind_word'
../gcc/include/unwind.h:49: error: unknown machine mode 'unwind_word'
In file included from ../../libbacktrace/backtrace.c:35:
../gcc/include/unwind.h:252:4: error: #error "__SIZEOF_LONG__ macro not
defined"
../gcc/include/unwind.h:256:4: error: #error "__SIZEOF_POINTER__ macro not
defined"
make[4]: *** [backtrace.lo] Error 1
make[3]: *** [all] Error 2
make[2]: *** [all-stage1-libbacktrace] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [all] Error 2