trouble building 4.7.2 w/binutils 2.23.1

[Uri Moszkowicz <uri@xxxxxxxxx>]

Hi,
I'm trying to build GCC 4.7.2 with binutils 2.23.1 and am getting a
compile error:

dwarf.o: In function `get_TAG_name':
/w/umoszkow/gcc/x86_64/binutils/../../gcc-4.7.2/binutils/dwarf.c:662:
undefined reference to `get_DW_TAG_name'
dwarf.o: In function `get_FORM_name':
/w/umoszkow/gcc/x86_64/binutils/../../gcc-4.7.2/binutils/dwarf.c:678:
undefined reference to `get_DW_FORM_name'
dwarf.o: In function `get_AT_name':
/w/umoszkow/gcc/x86_64/binutils/../../gcc-4.7.2/binutils/dwarf.c:1867:
undefined reference to `get_DW_AT_name'
collect2: error: ld returned 1 exit status

Any idea how to get around this build problem? My arch is x86_64 and
my OS is RHEL4u8WS.

Thanks!