error in compile php-4-RC01 .. with -O6 option

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make[4]: Entering directory
`/usr/home/dwhong/com/php-4.0RC1/ext/xml/expat/xmltok'
make[5]: Entering directory
`/usr/home/dwhong/com/php-4.0RC1/ext/xml/expat/xmltok'
gcc -DHAVE_CONFIG_H -I.
-I/usr/home/dwhong/com/php-4.0RC1/ext/xml/expat/xmltok -I../../../..
-I../../../../Zend -I/usr/home/dwhong/c
om/php-4.0RC1 -I/usr/home/dwhong/com/apache_1.3.12/src/include
-I/usr/home/dwhong/com/apache_1.3.12/src/os/unix -I/usr/app/mysql/inc
lude/mysql -I/usr/home/dwhong/com/php-4.0RC1/ext/xml/expat/xmltok
-I/usr/home/dwhong/com/php-4.0RC1/ext/xml/expat/xmlparse  -DXML_BY
TE_ORDER=12 -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -O6 -g -Wall  -c
xmltok.c && touch xmltok.lo
In file included from xmltok.c:262:
xmltok_impl.c: In function `normal_getAtts':
xmltok_impl.c:1478: Internal compiler error in `do_spl', at loop.c:12473

Please submit a full bug report.