GCC 4.7.2 final failing to build with clfs embedded

gcc-fail

make[2]: Entering directory `/opt/clfs/clfs-armv7/sources/gcc-build/gcc'
gawk -f ../../gcc-4.7.3/gcc/opt-functions.awk -f ../../gcc-4.7.3/gcc/opt-read.awk \
       -f ../../gcc-4.7.3/gcc/opth-gen.awk \
       < optionlist > tmp-options.h
/bin/sh ../../gcc-4.7.3/gcc/../move-if-change tmp-options.h options.h
echo timestamp > s-options-h
gcc   -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Wold-style-definition -Wc++-compat   -DHAVE_CONFIG_H -DGENERATOR_FILE -Wl,-rpath,/opt/clfs/clfs-armv7/cross-tools/lib -o build/genconstants \
    build/genconstants.o build/read-md.o build/errors.o ../build-x86_64-cross-linux-gnu/libiberty/libiberty.a
build/errors.o: In function `warning':
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/errors.c:52: undefined reference to `__fputc_unlocked'
build/errors.o: In function `error':
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/errors.c:67: undefined reference to `__fputc_unlocked'
build/errors.o: In function `fatal':
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/errors.c:84: undefined reference to `__fputc_unlocked'
build/errors.o: In function `internal_error':
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/errors.c:99: undefined reference to `__fputc_unlocked'
build/genconstants.o: In function `print_enum_type':
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/genconstants.c:63: undefined reference to `__fputc_unlocked'
build/read-md.o: In function `read_char':
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/read-md.h:101: undefined reference to `__fgetc_unlocked'
build/read-md.o: In function `print_c_condition':
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/read-md.c:226: undefined reference to `__fputc_unlocked'
build/read-md.o: In function `read_char':
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/read-md.h:101: undefined reference to `__fgetc_unlocked'
build/read-md.o: In function `fatal_with_file_and_line':
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/read-md.c:284: undefined reference to `__fputc_unlocked'
build/read-md.o: In function `read_char':
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/read-md.h:101: undefined reference to `__fgetc_unlocked'
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/read-md.h:101: undefined reference to `__fgetc_unlocked'
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/read-md.h:101: undefined reference to `__fgetc_unlocked'
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/read-md.h:101: undefined reference to `__fgetc_unlocked'
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/read-md.h:101: undefined reference to `__fgetc_unlocked'
build/read-md.o:/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/read-md.h:101: more undefined references to `__fgetc_unlocked' follow
build/read-md.o: In function `message_with_line_1':
/opt/clfs/clfs-armv7/sources/gcc-build/gcc/../../gcc-4.7.3/gcc/read-md.c:240: undefined reference to `__fputc_unlocked'
collect2: error: ld returned 1 exit status
make[2]: *** [build/genconstants] Error 1
make[2]: Leaving directory `/opt/clfs/clfs-armv7/sources/gcc-build/gcc'
make[1]: *** [all-gcc] Error 2
make[1]: Leaving directory `/opt/clfs/clfs-armv7/sources/gcc-build'
make: *** [all] Error 2