when compiling with ./configure --with-apxs=/usr/local/apache/bin/apxs --with-mysql=/usr/local/mysql the compilation is terminated with an error:

make[3]: Entering directory `/home/joe/cvs/php4/ext/standard'
/bin/sh ../../libtool --silent --mode=compile gcc -DHAVE_CONFIG_H -I.
-I/home/joe/cvs/php4/ext/standard -I../.. -I../../Zend
-I/home/joe/cvs/php4 -I/usr/local/apache/include
-I/usr/local/mysql/include -I/home/joe/cvs/php4/ext/xml/expat/xmltok
-I/home/joe/cvs/php4/ext/xml/expat/xmlparse  -DXML_BYTE_ORDER=12
-D_REENTRANT -g -O2 -Wall  -c crypt.c
crypt.c: In function `php_if_crypt':
crypt.c:110: `PHP_MAX_SALT_LEN' undeclared (first use in this function)
crypt.c:110: (Each undeclared identifier is reported only once
crypt.c:110: for each function it appears in.)
crypt.c:110: size of array `salt' has non-integer type
crypt.c: At top level:
crypt.c:101: warning: `php_to64' defined but not used
make[3]: *** [crypt.lo] Error 1
make[3]: Leaving directory `/home/joe/cvs/php4/ext/standard'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/joe/cvs/php4/ext/standard'
make[1]: *** [all] Error 1
make[1]: Leaving directory `/home/joe/cvs/php4/ext'
make: *** [all-recursive] Error 1