build problems with xulrunner 16.0.2: : 'malloc_usable_size' was not declared in this scope

[Richard PALO <richard.palo%baou.fr@localhost>]

Hello,

I"m trying to build xulrunner (for thunderbird and firefox) from trunk.
Running on OpenIndiana 151a7 in a non-global zone initially bootstrapped 
with Jonathan Perkin's bootstrap-2012Q3-illumos.tar.gz.
NB: gcc47 has been updated to 4.7.2 which is supposed to help mozilla 
builds...
the builds seem to indicate namespace problem:

g++ -o mozalloc.o -c   -DMOZ_GLUE_IN_PROGRAM -I../../xpcom -I. -I. 
-I../../dist/include  -I/opt/pkg/include/nspr -I/opt/pkg/include/nss/nss 
-I/opt/pkg/include/nss -I/opt/pkg/include/nspr        -fPIC 
-I/usr/include -I/opt/pkg/include -I/opt/pkg/include/gettext 
-I/opt/pkg/include/nspr -I/opt/pkg/include/freetype2 -O -I/usr/include 
-I/opt/pkg/include -I/opt/pkg/include/gettext -I/opt/pkg/include/nspr 
-I/opt/pkg/include/freetype2 -fno-exceptions -fno-strict-aliasing 
-fno-rtti -ffunction-sections -fdata-sections -fno-exceptions 
-std=gnu++0x -pthread -pipe  -DNDEBUG -DTRIMMED -O2 -fomit-frame-pointer 
 -I/usr/include -I/opt/pkg/include -I/opt/pkg/include/gettext 
-I/opt/pkg/include/nspr -I/opt/pkg/include/freetype2 -DMOZILLA_CLIENT 
-include ../../mozilla-config.h -MD -MF .deps/mozalloc.o.pp 
/tmp/pkgsrc/devel/xulrunner/work/mozilla-release/memory/mozalloc/mozalloc.cpp
/tmp/pkgsrc/devel/xulrunner/work/mozilla-release/memory/mozalloc/mozalloc.cpp: 
In function 'ulong_t moz_malloc_usable_size(void*)':
/tmp/pkgsrc/devel/xulrunner/work/mozilla-release/memory/mozalloc/mozalloc.cpp:215:34: 
error: 'malloc_usable_size' was not declared in this scope
gmake[3]: *** [mozalloc.o] Error 1

has anybody else come across these and have any patches or other 
suggestions that may help?
I've tried the default, which is with mozilla-jemalloc, and also with 
mozilla-jemalloc disabled which gives a similar problem:
g++ -o mozalloc_abort.o -c   -DMOZ_GLUE_IN_PROGRAM -I../../xpcom -I. -I. 
-I../../dist/include  -I/opt/pkg/include/nspr -I/opt/pkg/include/nss/nss 
-I/opt/pkg/include/nss -I/opt/pkg/include/nspr        -fPIC 
-I/usr/include -I/opt/pkg/include -I/opt/pkg/include/gettext 
-I/opt/pkg/include/nspr -I/opt/pkg/include/freetype2 -O -I/usr/include 
-I/opt/pkg/include -I/opt/pkg/include/gettext -I/opt/pkg/include/nspr 
-I/opt/pkg/include/freetype2 -fno-exceptions -fno-strict-aliasing 
-fno-rtti -ffunction-sections -fdata-sections -fno-exceptions 
-std=gnu++0x -pthread -pipe  -DNDEBUG -DTRIMMED -O2 -fomit-frame-pointer 
 -I/usr/include -I/opt/pkg/include -I/opt/pkg/include/gettext 
-I/opt/pkg/include/nspr -I/opt/pkg/include/freetype2 -DMOZILLA_CLIENT 
-include ../../mozilla-config.h -MD -MF .deps/mozalloc_abort.o.pp 
/tmp/pkgsrc/devel/xulrunner/work/mozilla-release/memory/mozalloc/mozalloc_abort.cpp
/tmp/pkgsrc/devel/xulrunner/work/mozilla-release/memory/mozalloc/mozalloc_abort.cpp: 
In function 'void abort()':
/tmp/pkgsrc/devel/xulrunner/work/mozilla-release/memory/mozalloc/mozalloc_abort.cpp:30:16: 
error: 'void abort()' conflicts with previous using declaration 'void 
std::abort()'
gmake[3]: *** [mozalloc_abort.o] Error 1

full logs available if needed.

Thanks in advance