I am trying to build gcc from svn Revision 130989 on my Intel Mac  
under Leopard and Xcode 3.0
Installed gcc version 4.3.0 20071103 (experimental) [trunk revision  
129867] (GCC)

Configure command
../gcc/configure --enable-threads=gnat --enable-languages=all ada

I get the following failure:

/bin/sh ../../../../gcc/libgcc/../mkinstalldirs x86_64
/gcc-devel/build/./gcc/xgcc -B/gcc-devel/build/./gcc/ -B/usr/local/ 
i386-apple-darwin9.1.0/bin/ -B/usr/local/i386-apple-darwin9.1.0/lib/ - 
isystem /usr/local/i386-apple-darwin9.1.0/include -isystem /usr/local/ 
i386-apple-darwin9.1.0/sys-include -O2  -O2 -g -g -O2   -DIN_GCC    -W  
-Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold- 
style-definition  -isystem ./include  -fPIC -pipe -g - 
DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED  -dynamiclib - 
nodefaultlibs -install_name /usr/local/lib/libgcc_s`if test x86_64 =  
ppc64 ; then echo _x86_64 ; fi`.1.dylib -single_module -o x86_64/ 
libgcc_s.1.dylib.tmp -Wl,-exported_symbols_list,libgcc.map - 
compatibility_version 1 -current_version 1.0 -g -fkeep-inline- 
functions -m64 -B./ _muldi3_s.o _negdi2_s.o _lshrdi3_s.o _ashldi3_s.o  
_ashrdi3_s.o _cmpdi2_s.o _ucmpdi2_s.o _clear_cache_s.o  
_enable_execute_stack_s.o _trampoline_s.o __main_s.o _absvsi2_s.o  
_absvdi2_s.o _addvsi3_s.o _addvdi3_s.o _subvsi3_s.o _subvdi3_s.o  
_mulvsi3_s.o _mulvdi3_s.o _negvsi2_s.o _negvdi2_s.o _ctors_s.o  
_ffssi2_s.o _ffsdi2_s.o _clz_s.o _clzsi2_s.o _clzdi2_s.o _ctzsi2_s.o  
_ctzdi2_s.o _popcount_tab_s.o _popcountsi2_s.o _popcountdi2_s.o  
_paritysi2_s.o _paritydi2_s.o _powisf2_s.o _powidf2_s.o _powixf2_s.o  
_powitf2_s.o _mulsc3_s.o _muldc3_s.o _mulxc3_s.o _multc3_s.o  
_divsc3_s.o _divdc3_s.o _divxc3_s.o _divtc3_s.o _bswapsi2_s.o  
_bswapdi2_s.o _fixunssfsi_s.o _fixunsdfsi_s.o _fixunsxfsi_s.o  
_fixsfdi_s.o _fixdfdi_s.o _fixxfdi_s.o _fixtfdi_s.o _fixunssfdi_s.o  
_fixunsdfdi_s.o _fixunsxfdi_s.o _fixunstfdi_s.o _floatdisf_s.o  
_floatdidf_s.o _floatdixf_s.o _floatditf_s.o _floatundisf_s.o  
_floatundidf_s.o _floatundixf_s.o _floatunditf_s.o _fixsfti_s.o  
_fixdfti_s.o _fixxfti_s.o _fixtfti_s.o _fixunssfti_s.o _fixunsdfti_s.o  
_fixunsxfti_s.o _fixunstfti_s.o _floattisf_s.o _floattidf_s.o  
_floattixf_s.o _floattitf_s.o _floatuntisf_s.o _floatuntidf_s.o  
_floatuntixf_s.o _floatuntitf_s.o _divdi3_s.o _moddi3_s.o _udivdi3_s.o  
_umoddi3_s.o _udiv_w_sdiv_s.o _udivmoddi4_s.o darwin-64_s.o addtf3_s.o  
divtf3_s.o eqtf2_s.o getf2_s.o letf2_s.o multf3_s.o negtf2_s.o  
subtf3_s.o unordtf2_s.o fixtfsi_s.o fixunstfsi_s.o floatsitf_s.o  
floatunsitf_s.o fixtfdi_s.o fixunstfdi_s.o floatditf_s.o  
floatunditf_s.o fixtfti_s.o fixunstfti_s.o floattitf_s.o  
floatuntitf_s.o extendsftf2_s.o extenddftf2_s.o extendxftf2_s.o  
trunctfsf2_s.o trunctfdf2_s.o trunctfxf2_s.o unwind-dw2_s.o unwind-dw2- 
fde-darwin_s.o unwind-sjlj_s.o unwind-c_s.o emutls_s.o -lc
ld: warning in /usr/lib/dylib1.10.5.o, file is not of required  
architecture
Undefined symbols:
   "___gthread_active_p", referenced from:
       ___emutls_get_address in emutls_s.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make[5]: *** [libgcc_s.dylib] Error 1
make[4]: *** [multi-do] Error 1
make[3]: *** [all-multi] Error 2
make[2]: *** [all-stage1-target-libgcc] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [all] Error 2

Configure log attached.
I will appreciate any helpful suggestions

Thanks
Roger