unable to build in OS X < 10.7

[Roger Pack]

Hello.
As a note, I seem to get this as well (ref:
http://lists.gnu.org/archive/html/bug-binutils/2014-12/msg00189.html
sorry i wasn't subscribed to the list at the time so can't easily
respond in its thread).
Cheers!

libtool: link: gcc -W -Wall -Wstrict-prototypes -Wmissing-prototypes
-Wshadow -g -O2 -o as-new app.o as.o atof-generic.o compress-debug.o
cond.o depend.o dwarf2dbg.o dw2gencfi.o ecoff.o ehopt.o expr.o
flonum-copy.o flonum-konst.o flonum-mult.o frags.o hash.o input-file.o
input-scrub.o listing.o literal.o macro.o messages.o output-file.o
read.o remap.o sb.o stabs.o subsegs.o symbols.o write.o tc-i386.o
obj-coff.o atof-ieee.o  ../opcodes/.libs/libopcodes.a
../bfd/.libs/libbfd.a -ldl ../libiberty/libiberty.a -lz
Undefined symbols:
  "_wcsncasecmp", referenced from:
      _rsrc_sort_entries in libbfd.a(peigen.o)
ld: symbol(s) not found
collect2: ld returned 1 exit status