When I compile Apache 1.3.12 + php-4.0b4pl1 + OpenSSL + mod_ssl + MySQL on my Redhat6.1/intel-6x86:

.....

$ CFLAGS='-O2 -I/usr/local/ssl/include' \
      ./configure \
          --with-apache=../apache_1.3.12 \
          --with-mysql=/usr \
          --with-session \
          --enable-memory-limit=yes \
          --enable-track-vars 
          --with-config-file-path=/usr/local/lib/php.ini
$ gmake

then it will return such error message:
macro 'PHP3_MAX_SALT_LEN' not defined in file 'ext\standard\crypt.c'

I checked the file, see may PHP3_STD_DES_CRYPT, PHP3_EXT_DES_CRYPT, PHP3_MD5_CRYPT, PHP3_BLOWFISH_CRYPT are all FALSE,
so I add these code:

#ifndef PHP3_MAX_SALT_LEN
#define PHP3_MAX_SALT_LEN 17
#endif

then the compile passed. but we know it was NOT the official's solve...