PHP3 builds and installs correctly, but apache gets down w/ the following error: (got this w/ a strace)

munmap(0x2acd7000, 22681)               = 0
open("./php3.ini", O_RDONLY)            = -1 ENOENT (No such file or directory)
open("/php3.ini", O_RDONLY)             = -1 ENOENT (No such file or directory)
open("/var/lib/apache/conf/php3.ini", O_RDONLY) = 4
ioctl(4, TCGETS, 0x7fffc6ec)            = -1 ENOTTY (Inappropriate ioctl for device)
read(4, "[PHP_3]\n\n;;;;;;;;;;;;;;;;;;;\n; A"..., 8192) = 8192
read(4, ".defaultlrl\t=\t4096\t; Handling of"..., 8192) = 4630
read(4, "", 3562)                       = 0
read(4, "", 8192)                       = 0
ioctl(4, TCGETS, 0x7fffc6d8)            = -1 ENOTTY (Inappropriate ioctl for device)
--- SIGSEGV (Falha de segmenta??o) ---
root@installer:/home/hquest# _

I can't use gdb, cause httpd forks w/ success, and gdb returns me no errors. I know that is a problem w/ MySQL, 'cause if i compile PHP3 w/out MySQL support, the module works fine.

The system is a fresh Slack7.1 plus:
- OpenLDAP 1.2.11
- UCD-SNMP 4.1.2
- OpenSSL-0.9.5a
- IMAP from Pine 4.21
- GD 1.8.3
- Apache-1.3.12
- PHP-3.0.1[3-6] (no one works w/ MySQL support -- all other features works)
- MySQL-3.22.[27,30,32]

All was compiled in this machine, and this is my ./do-conf:

./configure --with-apxs=/var/lib/apache/sbin/apxs \
                --with-shared-apache=/var/lib/apache \
                --with-apache=/var/lib/apache \
                --with-config-file-path=/var/lib/apache/conf \
                --with-exec-dir=/var/lib/apache/htdocs \
                --with-mod-dav=/var/lib/apache \
                --with-ldap=/usr \
                --with-imap=/tmp/pine4.21/imap \
                --with-mysql=/usr \
                --with-freetype \
                --with-dbase \
                --with-filepro \
                --with-zlib \
                --with-ftp \
                --with-openssl \
                --with-snmp \
                --with-xml \
                --with-yp \
                --with-db2 \
                --with-gdbm \
                --with-gd \
                --with-jpeg-dir \
                --with-tiff-dir \
                --with-gettext \
                --with-system-regex \
                --enable-ucd-snmp-hack \
                --enable-sysvshm \
                --enable-sysvsem \
                --enable-memory-limit \
                --enable-discard-path \
                --disable-debug