2.2.3 fails to build with CFLAGS="-march=i686 -mcpu=i686 -O2" ?

[Frédéric L . W . Meunier]

Hi. I just built gcc CVS 3.0 20010610 (prerelease), but when I
try to build glibc using CFLAGS="-march=i686 -mcpu=i686 -O2" I
get the following error:

gcc iofgetws.c -c -O2 -Wall -Winline -Wstrict-prototypes
-Wwrite-strings -march=i686 -mcpu=i686      -I../include -I.
-I/home/pervalidus/objdir/libio -I.. -I../libio
-I/home/pervalidus/objdir -I../sysdeps/i386/elf
-I../linuxthreads/sysdeps/unix/sysv/linux/i386
-I../linuxthreads/sysdeps/unix/sysv/linux
-I../linuxthreads/sysdeps/pthread
-I../linuxthreads/sysdeps/unix/sysv
-I../linuxthreads/sysdeps/unix
-I../linuxthreads/sysdeps/i386/i686
-I../linuxthreads/sysdeps/i386/i586
-I../linuxthreads/sysdeps/i386
-I../sysdeps/unix/sysv/linux/i386/i686
-I../sysdeps/unix/sysv/linux/i386 -I../sysdeps/unix/sysv/linux
-I../sysdeps/gnu -I../sysdeps/unix/common
-I../sysdeps/unix/mman -I../sysdeps/unix/inet
-I../sysdeps/unix/sysv/i386 -I../sysdeps/unix/sysv
-I../sysdeps/unix/i386 -I../sysdeps/unix -I../sysdeps/posix
-I../sysdeps/i386/i686/fpu -I../sysdeps/i386/i686
-I../sysdeps/i386/i486 -I../sysdeps/i386/fpu -I../sysdeps/i386
-I../sysdeps/wordsize-32 -I../sysdeps/ieee754/ldbl-96
-I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754/flt-32
-I../sysdeps/ieee754 -I../sysdeps/generic/elf
-I../sysdeps/generic   -D_LIBC_REENTRANT -include
../include/libc-symbols.h     -D_IO_MTSAFE_IO -o
/home/pervalidus/objdir/libio/iofgetws.o
iofgetws.c: In function `fgetws':
iofgetws.c:34: argument `fp' doesn't match prototype
../wcsmbs/wchar.h:624: prototype declaration
make[2]: *** [/home/pervalidus/objdir/libio/iofgetws.o] Error 1
make[2]: Leaving directory `/usr/local/src/GNU/glibc-2.2.3/libio'
make[1]: *** [libio/subdir_lib] Error 2
make[1]: Leaving directory `/usr/local/src/GNU/glibc-2.2.3'
make: *** [all] Error 2

I'm using --prefix=/usr --without-cvs --disable-profile
--enable-add-ons=linuxthreads --enable-kernel=2.4.5

Is this a gcc or glibc bug ? I was able to build 2.2.3 with
gcc 2.95.3 without CFLAGS when it was released.

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