I'm using gcc 4.2.2, binutils 2.18, and configure like this:

$ cd build && CFLAGS="-pipe -Os" ../configure --prefix=/usr --disable-profile
--enable-add-ons --without-cvs --with-tls --enable-stackguard-randomization

These are the last build lines:

make[2]: Leaving directory `/tmp/glibc-2.7/elf'
cd /tmp/glibc-2.7/build && ar cruv libc.a `cat csu/stamp.o iconv/stamp.o
iconvdata/stamp.o locale/stamp.o localedata/stamp.o assert/stamp.o ctype/stamp.o
intl/stamp.o catgets/stamp.o math/stamp.o setjmp/stamp.o signal/stamp.o
stdlib/stamp.o stdio-common/stamp.o libio/stamp.o dlfcn/stamp.o malloc/stamp.o
string/stamp.o wcsmbs/stamp.o timezone/stamp.o time/stamp.o dirent/stamp.o
grp/stamp.o pwd/stamp.o posix/stamp.o io/stamp.o termios/stamp.o
resource/stamp.o misc/stamp.o socket/stamp.o sysvipc/stamp.o gmon/stamp.o
gnulib/stamp.o wctype/stamp.o manual/stamp.o shadow/stamp.o po/stamp.o
argp/stamp.o crypt/stamp.o nptl/stamp.o resolv/stamp.o nss/stamp.o rt/stamp.o
conform/stamp.o debug/stamp.o libidn/stamp.o nptl_db/stamp.o inet/stamp.o
hesiod/stamp.o sunrpc/stamp.o nis/stamp.o nscd/stamp.o streams/stamp.o
login/stamp.o elf/stamp.o stamp.o`
r - locale/C-ctype.o
r - misc/lseek.o
: /tmp/glibc-2.7/build/libc.a
/opt/gcc/bin/gcc   -nostdlib -nostartfiles -r -o /tmp/glibc-2.7/build/libc_pic.os \
         -Wl,-d -Wl,--whole-archive /tmp/glibc-2.7/build/libc_pic.a
/opt/gcc/bin/gcc   -shared -static-libgcc -Wl,-O1  -Wl,-z,defs
-Wl,-dynamic-linker=/lib64/ld-linux-x86-64.so.2  -B/tmp/glibc-2.7/build/csu/ 
-Wl,--version-script=/tmp/glibc-2.7/build/libc.map -Wl,-soname=libc.so.6
-Wl,-z,combreloc -Wl,-z,relro -Wl,--hash-style=both -nostdlib -nostartfiles -e
__libc_main -L/tmp/glibc-2.7/build -L/tmp/glibc-2.7/build/math
-L/tmp/glibc-2.7/build/elf -L/tmp/glibc-2.7/build/dlfcn
-L/tmp/glibc-2.7/build/nss -L/tmp/glibc-2.7/build/nis -L/tmp/glibc-2.7/build/rt
-L/tmp/glibc-2.7/build/resolv -L/tmp/glibc-2.7/build/crypt
-L/tmp/glibc-2.7/build/nptl
-Wl,-rpath-link=/tmp/glibc-2.7/build:/tmp/glibc-2.7/build/math:/tmp/glibc-2.7/build/elf:/tmp/glibc-2.7/build/dlfcn:/tmp/glibc-2.7/build/nss:/tmp/glibc-2.7/build/nis:/tmp/glibc-2.7/build/rt:/tmp/glibc-2.7/build/resolv:/tmp/glibc-2.7/build/crypt:/tmp/glibc-2.7/build/nptl
-o /tmp/glibc-2.7/build/libc.so -T /tmp/glibc-2.7/build/shlib.lds
/tmp/glibc-2.7/build/csu/abi-note.o /tmp/glibc-2.7/build/elf/soinit.os
/tmp/glibc-2.7/build/libc_pic.os /tmp/glibc-2.7/build/elf/sofini.os
/tmp/glibc-2.7/build/elf/interp.os /tmp/glibc-2.7/build/elf/ld.so -lgcc
/tmp/glibc-2.7/build/libc_pic.os: In function `faccessat':
(.text+0x82aea): undefined reference to `fstatat64'
collect2: ld returned 1 exit status
make[1]: *** [/tmp/glibc-2.7/build/libc.so] Error 1
make[1]: Leaving directory `/tmp/glibc-2.7'
make: *** [all] Error 2

$ grep -lr fstatat64 .
./libc_pic.os
./libc.a
./libc_pic.a
./libc_nonshared.a
./io/fstatat64.o.d
./io/fstatat64.oS.d
./io/stamp.oS
./io/fstatat64.oS
./io/faccessat.os
./io/stamp.o
./io/faccessat.o
./io/fstatat64.o
$ grep -lr fstatat64 io | xargs -n1 nm
nm: io/fstatat64.o.d: File format not recognized
nm: io/fstatat64.oS.d: File format not recognized
nm: io/stamp.oS: File format not recognized
                 U _GLOBAL_OFFSET_TABLE_
                 U __fxstatat64
0000000000000000 T fstatat64
                 U _GLOBAL_OFFSET_TABLE_
                 U __atfct_seterrno
                 U __getegid
                 U __geteuid
                 U __getgid
                 U __getuid
                 U __group_member
                 U __have_atfcts
                 U __libc_enable_secure
                 U __libc_errno
                 U __snprintf
0000000000000000 T faccessat
                 U fstatat64
0000000000000000 r procfd.7014
nm: io/stamp.o: File format not recognized
                 U _GLOBAL_OFFSET_TABLE_
                 U __atfct_seterrno
                 U __getegid
                 U __geteuid
                 U __getgid
                 U __getuid
                 U __group_member
                 U __have_atfcts
                 U __libc_enable_secure
                 U __libc_errno
                 U __snprintf
0000000000000000 T faccessat
                 U fstatat64
0000000000000000 r procfd.6816
                 U __fxstatat64
0000000000000000 T fstatat64
$