I have a system with Ubuntu 7.10 based on x86_64. I am trying to compile some GCC version. This is really just a benchmark test as I compare run times on various computers to see which one is faster. Anyway, no matter what I try on this system, it tries to build 32 bit versions, and cannot. I do not want them to be built, I just want a build to finish. I tried gcc-4.2.3: ./configure ; make clean all ./configure --disable-multilib ; make clean all ./configure --disable-multilib --with-arch=x86_64 ; make clean all ./configure --disable-multilib --with-arch=x86_64 --disable-targets=i386 ; make clean all The result I invariably get is this. HELP!!!!!!!!!!! new_drives/fast/tmp/gcc-4.2.3/host-x86_64-unknown-linux-gnu/gcc/xgcc -B/new_drives/fast/tmp/gcc-4.2.3/host-x86_64-unknown-linux-gnu/gcc/ -B/usr/local/x86_64-unknown-linux-gnu/bin/ -B/usr/local/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/x86_64-unknown-linux-gnu/include -isystem /usr/local/x86_64-unknown-linux-gnu/sys-include -O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -shared -nodefaultlibs -Wl,--soname=libgcc_s.so.1 -Wl,--version-script=libgcc/32/libgcc.map -o 32/libgcc_s.so.1.tmp -m32 libgcc/32/_muldi3_s.o libgcc/32/_negdi2_s.o libgcc/32/_lshrdi3_s.o libgcc/32/_ashldi3_s.o libgcc/32/_ashrdi3_s.o libgcc/32/_cmpdi2_s.o libgcc/32/_ucmpdi2_s.o libgcc/32/_clear_cache_s.o libgcc/32/_enable_execute_stack_s.o libgcc/32/_trampoline_s.o libgcc/32/__main_s.o libgcc/32/_absvsi2_s.o libgcc/32/_absvdi2_s.o libgcc/32/_addvsi3_s.o libgcc/32/_addvdi3_s.o libgcc/32/_subvsi3_s.o libgcc/32/_subvdi3_s.o libgcc/32/_mulvsi3_s.o libgcc/32/_mulvdi3_s.o libgcc/32/_negvsi2_s.o libgcc/32/_negvdi2_s.o libgcc/32/_ctors_s.o libgcc/32/_ffssi2_s.o libgcc/32/_ffsdi2_s.o libgcc/32/_clz_s.o libgcc/32/_clzsi2_s.o libgcc/32/_clzdi2_s.o libgcc/32/_ctzsi2_s.o libgcc/32/_ctzdi2_s.o libgcc/32/_popcount_tab_s.o libgcc/32/_popcountsi2_s.o libgcc/32/_popcountdi2_s.o libgcc/32/_paritysi2_s.o libgcc/32/_paritydi2_s.o libgcc/32/_powisf2_s.o libgcc/32/_powidf2_s.o libgcc/32/_powixf2_s.o libgcc/32/_powitf2_s.o libgcc/32/_mulsc3_s.o libgcc/32/_muldc3_s.o libgcc/32/_mulxc3_s.o libgcc/32/_multc3_s.o libgcc/32/_divsc3_s.o libgcc/32/_divdc3_s.o libgcc/32/_divxc3_s.o libgcc/32/_divtc3_s.o libgcc/32/_fixunssfsi_s.o libgcc/32/_fixunsdfsi_s.o libgcc/32/_fixunsxfsi_s.o libgcc/32/_fixsfdi_s.o libgcc/32/_fixunssfdi_s.o libgcc/32/_floatdisf_s.o libgcc/32/_floatundisf_s.o libgcc/32/_fixdfdi_s.o libgcc/32/_fixunsdfdi_s.o libgcc/32/_floatdidf_s.o libgcc/32/_floatundidf_s.o libgcc/32/_fixxfdi_s.o libgcc/32/_fixunsxfdi_s.o libgcc/32/_floatdixf_s.o libgcc/32/_floatundixf_s.o libgcc/32/_fixtfdi_s.o libgcc/32/_fixunstfdi_s.o libgcc/32/_floatditf_s.o libgcc/32/_floatunditf_s.o libgcc/32/_divdi3_s.o libgcc/32/_moddi3_s.o libgcc/32/_udivdi3_s.o libgcc/32/_umoddi3_s.o libgcc/32/_udiv_w_sdiv_s.o libgcc/32/_udivmoddi4_s.o libgcc/32/unwind-dw2_s.o libgcc/32/unwind-dw2-fde-glibc_s.o libgcc/32/unwind-sjlj_s.o libgcc/32/gthr-gnat_s.o libgcc/32/unwind-c_s.o -lc && rm -f 32/libgcc_s.so && if [ -f 32/libgcc_s.so.1 ]; then mv -f 32/libgcc_s.so.1 32/libgcc_s.so.1.backup; else true; fi && mv 32/libgcc_s.so.1.tmp 32/libgcc_s.so.1 && ln -s libgcc_s.so.1 32/libgcc_s.so /usr/bin/ld: skipping incompatible /usr/lib/../lib/libc.so when searching for -lc /usr/bin/ld: skipping incompatible /usr/lib/../lib/libc.a when searching for -lc /usr/bin/ld: skipping incompatible /usr/bin/../lib/libc.so when searching for -lc /usr/bin/ld: skipping incompatible /usr/bin/../lib/libc.a when searching for -lc /usr/bin/ld: i386:x86-64 architecture of input file `/usr/lib/../lib/crti.o' is incompatible with i386 output /usr/bin/ld: i386:x86-64 architecture of input file `/usr/lib/../lib/crtn.o' is incompatible with i386 output collect2: ld returned 1 exit status make[4]: *** [32/libgcc_s.so] Error 1 make[4]: Leaving directory `/new_drives/fast/tmp/gcc-4.2.3/host-x86_64-unknown-linux-gnu/gcc' make[3]: *** [stmp-multilib] Error 2 make[3]: Leaving directory `/new_drives/fast/tmp/gcc-4.2.3/host-x86_64-unknown-linux-gnu/gcc' make[2]: *** [all-stage1-gcc] Error 2 make[2]: Leaving directory `/new_drives/fast/tmp/gcc-4.2.3' make[1]: *** [stage1-bubble] Error 2 make[1]: Leaving directory `/new_drives/fast/tmp/gcc-4.2.3' make: *** [all] Error 2