Mine

CXX=/sw/bin/g++-4 CC=/sw/bin/gcc-4 CFLAGS="-O2 -march=pentium-m -msse3"   CXXFLAGS="-O2 -march=pentium-m -msse3"   ../gcc-$VERSION/configure --prefix=/Users/edman007/Documents/gcc/      --enable-shared      --enable-languages=c,c++,fortran,java,objc      --enable-threads=posix      --enable-__cxa_atexit      --disable-checking      --with-gnu-ld      --verbose      --with-arch=i486      --target=i486-slackware-linux      --host=i486-slackware-linux --program-suffix=-linux



make bootstrap
#lots of stuff here
/sw/bin/gcc-4 -c   -g -DENABLE_CHECKING -DENABLE_ASSERT_CHECKING -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long -Wno-variadic-macros -Wold-style-definition -Wmissing-format-attribute    -DHAVE_CONFIG_H -I. -I. -I../../gcc-4.1.2/gcc -I../../gcc-4.1.2/gcc/. -I../../gcc-4.1.2/gcc/../include -I./../intl -I../../gcc-4.1.2/gcc/../libcpp/include     -I. -I. -I../../gcc-4.1.2/gcc -I../../gcc-4.1.2/gcc/. -I../../gcc-4.1.2/gcc/../include -I./../intl -I../../gcc-4.1.2/gcc/../libcpp/include  \
        ../../gcc-4.1.2/gcc/config/host-linux.c
../../gcc-4.1.2/gcc/config/host-linux.c: In function 'linux_gt_pch_use_address':
../../gcc-4.1.2/gcc/config/host-linux.c:192: error: 'MAP_ANONYMOUS' undeclared (first use in this function)
../../gcc-4.1.2/gcc/config/host-linux.c:192: error: (Each undeclared identifier is reported only once
../../gcc-4.1.2/gcc/config/host-linux.c:192: error: for each function it appears in.)
make[2]: *** [host-linux.o] Error 1
make[2]: *** Waiting for unfinished jobs....
rm gfortran.pod
make[1]: *** [stage1_build] Error 2
make: *** [bootstrap] Error 2