whirm@sphynx:~/src/buildroot/buildroot-svn$ make

Checking build system dependencies:
CC clean:                                       Ok
CXX clean:                                      Ok
CPP clean:                                      Ok
CFLAGS clean:                                   Ok
CXXFLAGS clean:                                 Ok
sed works:                                      Ok
which installed:                                Ok
GNU make version '3.81':                        Ok
C compiler '/usr/bin/gcc'
C compiler version '4.1.2':                     Ok
bison installed:                                Ok
flex installed:                                 Ok
gettext installed:                              Ok
Build system dependencies:                      Ok

make -C /home/whirm/src/buildroot/buildroot-svn/toolchain_build_i586/uClibc \
                PREFIX= \
                DEVEL_PREFIX=/ \
                RUNTIME_PREFIX=/ \
                HOSTCC="gcc" \
                all
make[1]: Entering directory `/home/whirm/src/buildroot/buildroot-svn/toolchain_build_i586/uClibc'
:0: error: CPU you selected does not support x86-64 instruction set
:0: error: CPU you selected does not support x86-64 instruction set
:0: error: CPU you selected does not support x86-64 instruction set
:0: error: CPU you selected does not support x86-64 instruction set
  CC ldso/ldso/ldso.oS
ldso/ldso/ldso.c:1: error: CPU you selected does not support x86-64 instruction set
ldso/ldso/ldso.c:1: error: CPU you selected does not support x86-64 instruction set
make[1]: *** [ldso/ldso/ldso.oS] Error 1
make[1]: Leaving directory `/home/whirm/src/buildroot/buildroot-svn/toolchain_build_i586/uClibc'
make: *** [/home/whirm/src/buildroot/buildroot-svn/toolchain_build_i586/uClibc/lib/libc.a] Error 2
whirm@sphynx:~/src/buildroot/buildroot-svn$