[SOLVED] make[4]: *** [tc-arm.o] Error 1

hi everyone!
I am developing embedded system.
I use workstation: pc-i686, GNU ubunu 11.4 to cross-develope for arm target.
I use: original kernel-3.2.11 ; toolchain: binutils-2.22, gcc-4.6.3, glibc-2.9
when I build binutils appear the following error:
......
gcc -DHAVE_CONFIG_H -I. -I../../binutils-2.22/gas -I. -I../../binutils-2.22/gas -I../bfd -I../../binutils-2.22/gas/config -I../../binutils-2.22/gas/../include -I../../binutils-2.22/gas/.. -I../../binutils-2.22/gas/../bfd -DLOCALEDIR="\"/home/hung/control-project//tools/share/locale\"" -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Werror -g -O2 -MT tc-arm.o -MD -MP -MF .deps/tc-arm.Tpo -c -o tc-arm.o `test -f 'config/tc-arm.c' || echo '../../binutils-2.22/gas/'`config/tc-arm.c
cc1: warnings being treated as errors
../../binutils-2.22/gas/config/tc-arm.c: In function ‘parse_operands’:
../../binutils-2.22/gas/config/tc-arm.c:1912:26: error: ‘firsttype$defined’ may be used uninitialized in this function
../../binutils-2.22/gas/config/tc-arm.c:1912:26: error: ‘firsttype$index’ may be used uninitialized in this function
make[4]: *** [tc-arm.o] Error 1
make[4]: Leaving directory `/home/hung/control-project/build-tools/build-binutils/gas'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/hung/control-project/build-tools/build-binutils/gas'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/hung/control-project/build-tools/build-binutils/gas'
make[1]: *** [all-gas] Error 2
make[1]: Leaving directory `/home/hung/control-project/build-tools/build-binutils'
make: *** [all] Error 2

what are this problems?
pleased to help me to solve it.
thank in advance.

Remove -Werror, it will treat all warnings as errors.
Or even better fix the warning.

This problem solved as the following:
Add option –disable-werror:
$ ../binutils-2.22/configure –disable-werror --target=$TARGET --prefix=${PREFIX}