steps in compilations:
----------------------------------------
rm -rf apache_1.3.12
rm -rf mod_ssl-2.6.4-1.3.12
rm -rf php-4.0.1pl2

gzip -dc apache_1.3.12.tar.gz | tar xvf -
gzip -dc mod_ssl-2.6.4-1.3.12.tar.gz | tar xvf -
gzip -dc php-4.0.1pl2.tar.gz | tar xvf -

chown -R root.root apache_1.3.12 mod_ssl-2.6.4-1.3.12 php-4.0.1pl2

cd mod_ssl-2.6.4-1.3.12
./configure --with-apache=../apache_1.3.12

cd ../apache_1.3.12
./configure --prefix=/home/apache_1.3.12

cd ../php-4.0.1pl2
CFLAGS="-O2 -I/usr/local/ssl/include" ./configure --with-apache=../apache_1.3.12 --with-oracle=/u01/app/oracle/product/8.1.5 --with-mysql=/home/mysql  --with-config-file-path=/home/apache_1.3.12/conf --with-ftp --with-x --with-xml --enable-force-cgi-redirect --enable-discard-path --enable-sigchild --with-openssl=/usr/local/ssl --enable-debug=yes --enable-calendar --enable-dba-shared --enable-filepro --with-oci8=/u01/app/oracle/product/8.1.5
gmake
gmake install

cd ../apache_1.3.12
SSL_BASE=/usr/local/ssl ./configure --prefix=/home/apache_1.3.12 --enable-shared=max --enable-module=most --enable-module=ssl --activate-module=src/modules/php4/libphp4.a --enable-module=php4
make
make certificate
make install
-------------------------------------------
gdb's bt output:

Program received signal SIGSEGV, Segmentation fault.
0x817ca8c in ologof ()
(gdb) bt
#0  0x817ca8c in ologof ()
#1  0x807f7c7 in ora_do_logon (ht=2, return_value=0x8210ce4, this_ptr=0x0, return_value_used=1, persistent=0)
    at oracle.c:511
#2  0x807f1e6 in php_if_ora_logon (ht=2, return_value=0x8210ce4, this_ptr=0x0, return_value_used=1) at oracle.c:359
#3  0x80f19a9 in execute (op_array=0x81dd984) at ./zend_execute.c:1558
#4  0x8066e2b in php_execute_script (primary_file=0xbffffa3c) at main.c:1157
#5  0x80d7380 in apache_php_module_main (r=0x81f6964, fd=19, display_source_mode=0) at sapi_apache.c:93
#6  0x8064b1b in send_php ()
#7  0x8064b5c in send_parsed_php ()
#8  0x80fb0d3 in ap_invoke_handler ()
#9  0x810ea79 in process_request_internal ()
#10 0x810eadc in ap_process_request ()
#11 0x81062ee in child_main ()
#12 0x810649c in make_child ()
#13 0x81065f9 in startup_children ()
#14 0x8106c26 in standalone_main ()
#15 0x81073c3 in main ()
#16 0x4063b1eb in __libc_start_main (main=0x810706c <main>, argc=2, argv=0xbffffbf4, init=0x80629ec <_init>, 
    fini=0x8136b4c <_fini>, rtld_fini=0x4000a610 <_dl_fini>, stack_end=0xbffffbec) at ../sysdeps/generic/libc-start.c:90
(gdb) 

-----------------------------------------
the php file being executed:

<?php
$ora_con=ora_logon("xxx/yyy@sid","");
$ora_db=ora_open($ora_con);
$query="SELECT function_id FROM b_function_index";
ora_parse($ora_db,$query);
ora_exec($ora_db);
while(ora_fetch($ora_db))
  echo ora_getcolumn($ora_db,0);
ora_close($ora_db);
ora_logoff($ora_con);
?>

-------------------------------------------