I am trying to build gcc42 (as part of py-numpy) on an intel iMac. uname -a: Darwin Edinburgh.local 8.8.1 Darwin Kernel Version 8.8.1: Mon Sep 25 19:42:00 PDT 2006; root:xnu-792.13.8.obj~1/RELEASE_I386 i386 i386 I have installed XCode 2.4.1. I am getting errors about not having an x86_64 assembler: ---> Building gcc42 with target bootstrap Error: Target com.apple.build returned: shell command "cd "/opt/local/ var/db/dports/build/ _opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dp orts_lang_gcc42/work/build" && make bootstrap -j 2" returned error 2 Command output: BUILD_PREFIX="" \ BUILD_PREFIX_1="" \ LANGUAGES="" \ LIBGCC2_CFLAGS="-O2 -O2 -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 -m64 " \ MULTILIB_CFLAGS=" -m64" T=x86_64/ x86_64/crt3.o /opt/local/var/db/dports/build/ _opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dp orts_lang_gcc42/work/build/./gcc/xgcc -B/opt/local/var/db/dports/ build/ _opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dp orts_lang_gcc42/work/build/./gcc/ -B/opt/local/i386-apple-darwin8.8.1/ bin/ -B/opt/local/i386-apple-darwin8.8.1/lib/ -isystem /opt/local/ i386-apple-darwin8.8.1/include -isystem /opt/local/i386-apple- darwin8.8.1/sys-include -O2 -O2 -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 -I. -I. -I../../ gcc-4.2-20070124/gcc -I../../gcc-4.2-20070124/gcc/. -I../../ gcc-4.2-20070124/gcc/../include -I../../gcc-4.2-20070124/gcc/../ libcpp/include -I/opt/local/include -I/opt/local/include -I../../ gcc-4.2-20070124/gcc/../libdecnumber -I../libdecnumber -m64 - DL_muldi3 -fvisibility=hidden -DHIDE_EXPORTS -c ../../ gcc-4.2-20070124/gcc/libgcc2.c -o libgcc/x86_64/_muldi3.o /opt/local/bin/odas: assembler (/opt/local/libexec/as/x86_64/as or ) for architecture x86_64 not installed Installed assemblers are: /opt/local/libexec/as/ppc64/as for architecture ppc64 /opt/local/libexec/as/ppc/as for architecture ppc /opt/local/libexec/as/i386/as for architecture i386 ../../gcc-4.2-20070124/gcc/libgcc2.c:542: fatal error: error writing to -: Broken pipe compilation terminated. make[4]: *** [libgcc/x86_64/_muldi3.o] Error 1 make[4]: *** Waiting for unfinished jobs.... /opt/local/var/db/dports/build/ _opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dp orts_lang_gcc42/work/build/./gcc/xgcc -B/opt/local/var/db/dports/ build/ _opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dp orts_lang_gcc42/work/build/./gcc/ -B/opt/local/i386-apple-darwin8.8.1/ bin/ -B/opt/local/i386-apple-darwin8.8.1/lib/ -isystem /opt/local/ i386-apple-darwin8.8.1/include -isystem /opt/local/i386-apple- darwin8.8.1/sys-include -O2 -g -O2 -DIN_GCC -W -Wall -Wwrite- strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style- definition -isystem ./include -I. -Ix86_64 -I../../gcc-4.2-20070124/ gcc -I../../gcc-4.2-20070124/gcc/x86_64 -I../../gcc-4.2-20070124/ gcc/../include -I../../gcc-4.2-20070124/gcc/../libcpp/include -I/opt/ local/include -I/opt/local/include -I../../gcc-4.2-20070124/gcc/../ libdecnumber -I../libdecnumber -m64 \ -fno-tree-dominator-opts \ -c ../../gcc-4.2-20070124/gcc/config/darwin-crt3.c -o x86_64/crt3.o /opt/local/bin/odas: assembler (/opt/local/libexec/as/x86_64/as or ) for architecture x86_64 not installed Installed assemblers are: /opt/local/libexec/as/ppc64/as for architecture ppc64 /opt/local/libexec/as/ppc/as for architecture ppc /opt/local/libexec/as/i386/as for architecture i386 make[5]: *** [x86_64/crt3.o] Error 1 make[4]: *** [extrax86_64] Error 2 make[3]: *** [stmp-multilib] Error 2 rm fsf-funding.pod gcov.pod cpp.pod gfdl.pod gpl.pod gcc.pod make[2]: *** [all-stage1-gcc] Error 2 make[1]: *** [stage1-bubble] Error 2 make: *** [bootstrap] Error 2 Can someone point me to a solution for this? Cheers, Ewan