Building a x86_64/x86_64 cross-compiler

[Oleg Smolsky <oleg dot smolsky at riverbed dot com>]

Hi all, I'm trying to build a x86_64-to-x86_64 cross-compiler with a 
sysroot using these steps:
    http://pmc.polytechnique.fr/pagesperso/dc/arm-en.html

With a few minor corrections and amendments, I get to the very last step 
where the full compiler is built and hit the following issue:

/work/osmolsky/_gcc-sr-build/_gcc-obj3/./prev-gcc/xg++ 
-B/work/osmolsky/_gcc-sr-build/_gcc-obj3/./prev-gcc/ 
-B/work/osmolsky/_gcc-sr-build/gcc48/x86_64-unknown-linux-gnu/bin/ 
-nostdinc++ 
-B/work/osmolsky/_gcc-sr-build/_gcc-obj3/prev-x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs 
-B/work/osmolsky/_gcc-sr-build/_gcc-obj3/prev-x86_64-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs 
-I/work/osmolsky/_gcc-sr-build/_gcc-obj3/prev-x86_64-unknown-linux-gnu/libstdc++-v3/include/x86_64-unknown-linux-gnu 
-I/work/osmolsky/_gcc-sr-build/_gcc-obj3/prev-x86_64-unknown-linux-gnu/libstdc++-v3/include 
-I/work/osmolsky/_gcc-sr-build/gcc48-google/libstdc++-v3/libsupc++ 
-L/work/osmolsky/_gcc-sr-build/_gcc-obj3/prev-x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs 
-L/work/osmolsky/_gcc-sr-build/_gcc-obj3/prev-x86_64-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs 
-g -O2 -gtoggle -DIN_GCC   -fno-exceptions -fno-rtti 
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings 
-Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long 
-Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H 
-DGENERATOR_FILE -static-libstdc++ -static-libgcc  -o build/genhooks \
            build/genhooks.o build/errors.o .././libiberty/libiberty.a
build/genhooks "Target Hook" \
                                             > tmp-target-hooks-def.h
build/genhooks: /lib64/libc.so.6: version `GLIBC_2.14' not found 
(required by build/genhooks)

I am using glibc 2.16.0 and have no idea where this thing came from. The 
binary does not run as the system's glibc (well, that very .so) is 
version 2.12.

I built glibc this way:

../glibc-2.16.0/configure --prefix=/work/osmolsky/_gcc-sr-build/gcc48 
--target=x86_64-unknown-linux-gnu 
--with-headers=/work/osmolsky/_gcc-sr-build/sysroot/usr/include 
--enable-kernel=2.6.32 --without-selinux

make install_root=/work/osmolsky/_gcc-sr-build/sysroot  prefix="" install

Could somebody shed some light on this please? Is this configuration 
supported? Am I missing something vital?

Thanks in advance!
Oleg.