Compilation breaks under slackware 9.0

Hi,

my test system:

Slackware 9.0.0

Reading specs from /usr/lib/gcc-lib/i386-slackware-linux/3.2.2/specs
Configured with: ../gcc-3.2.2/configure --prefix=/usr --enable-shared
--enable-threads=posix --enable-__cxa_atexit --disable-checking
--with-gnu-ld --verbose --target=i386-slackware-linux
--host=i386-slackware-linux
Thread model: posix
gcc version 3.2.2

the configuration:

CFLAGS="-O3 -mcpu=pentium4 -march=pentium4" CPPFLAGS="-O2 -mcpu=pentium4
-march=pentium4" ./configure \
        --prefix=/usr \
        --with-config-file-path=/etc/apache \
        --with-apxs=/usr/sbin/apxs \
        --enable-safe-mode \
        --enable-track-vars \
        --enable-trans-sid \
        --enable-bcmath \
        --enable-ctype \
        --with-mysql=/usr \
        --with-curl \
        --with-gettext \
        --with-xml \
        --with-openssl \
        --with-imap=/usr/local/uw-imap \
        --with-imap-ssl \
        --with-gd=/usr/local \
        --with-jpeg \
        --with-png \
        --with-zlib \
        --with-bz2 \
        --with-mhash \
        --with-mcrypt \
        --with-dom \
        --with-dom-xslt \
        --with-dom-exslt

The problem:

/bin/sh /home/rodolfo/software/php-4.3.10RC1/libtool --silent
--preserve-dup-deps --mode=compile gcc  -IZend/
-I/home/rodolfo/software/php-4.3.10RC1/Zend/ -DPHP_ATOM_INC
-I/home/rodolfo/software/php-4.3.10RC1/include
-I/home/rodolfo/software/php-4.3.10RC1/main
-I/home/rodolfo/software/php-4.3.10RC1
-I/home/rodolfo/software/php-4.3.10RC1/Zend -I/usr/local/include
-I/usr/include/libxml2 -I/usr/local/uw-imap/include -I/usr/include/mysql
-I/home/rodolfo/software/php-4.3.10RC1/ext/xml/expat  -O2 -mcpu=pentium4
-march=pentium4 -I/home/rodolfo/software/php-4.3.10RC1/TSRM  -O3
-mcpu=pentium4 -march=pentium4  -prefer-pic -c
/home/rodolfo/software/php-4.3.10RC1/Zend/zend_strtod.c -o
Zend/zend_strtod.lo
/home/rodolfo/software/php-4.3.10RC1/Zend/zend_strtod.c: In function
`zend_strtod':
/home/rodolfo/software/php-4.3.10RC1/Zend/zend_strtod.c:1768: unable to
find a register to spill in class `AREG'
/home/rodolfo/software/php-4.3.10RC1/Zend/zend_strtod.c:1768: this is the
insn:
(insn:QI 2283 2282 2284 (set (reg:CCNO 17 flags)
        (compare:CCNO (and:SI (subreg:SI (reg/v:DI 23 rxmm2 [90]) 0)
                (const_int 1 [0x1]))
            (const_int 0 [0x0]))) 281 {testsi_1} (nil)
    (nil))
/home/rodolfo/software/php-4.3.10RC1/Zend/zend_strtod.c:1768: confused by
earlier errors, bailing out
make: *** [Zend/zend_strtod.lo] Error 1

Any help is appreciated.

Regards,
Rodolfo.