+ apache with dso support
+ php compiled with "./configure" (no options)
+ no compiling / configuring errors

[root@lolita php-4.0RC1]# /opt/local/apache/bin/apachectl start
Syntax error on line 238 of /opt/local/apache/conf/httpd.conf:
Cannot load /opt/local/apache/libexec/libphp4.so into server: ld.so.1: /opt/local/apache/bin/httpd: fatal: relocation error: file /opt/local/apache/libexec/libphp4.so: symbol __udivdi3: referenced symbol not found
/opt/local/apache/bin/apachectl start: httpd could not be started
[root@lolita php-4.0RC1]# cd /opt/local/apache/libexec/
[root@lolita libexec]# ldd -r libphp4.so 
        libpam.so.1 =>   /lib/libpam.so.1
        libdl.so.1 =>    /lib/libdl.so.1
        libresolv.so.2 =>        /lib/libresolv.so.2
        libm.so.1 =>     /lib/libm.so.1
        libsocket.so.1 =>        /lib/libsocket.so.1
        libnsl.so.1 =>   /lib/libnsl.so.1
        libc.so.1 =>     /lib/libc.so.1
        libmp.so.2 =>    /lib/libmp.so.2
        /usr/platform/SUNW,Ultra-4/lib/libc_psr.so.1
        symbol not found: ap_unblock_alarms             (./libphp4.so)
        symbol not found: ap_block_alarms               (./libphp4.so)
        symbol not found: ap_group_id           (./libphp4.so)
        symbol not found: top_module            (./libphp4.so)
        symbol not found: ap_user_name          (./libphp4.so)
        symbol not found: ap_max_requests_per_child             (./libphp4.so)
        symbol not found: ap_server_root                (./libphp4.so)
        symbol not found: ap_user_id            (./libphp4.so)
        symbol not found: ap_rwrite             (./libphp4.so)
        symbol not found: ap_rflush             (./libphp4.so)
        symbol not found: ap_signal             (./libphp4.so)
        symbol not found: ap_hard_timeout               (./libphp4.so)
        symbol not found: ap_get_client_block           (./libphp4.so)
        symbol not found: ap_reset_timeout              (./libphp4.so)
        symbol not found: ap_table_get          (./libphp4.so)
        symbol not found: ap_pstrdup            (./libphp4.so)
        symbol not found: ap_table_add          (./libphp4.so)
        symbol not found: ap_table_set          (./libphp4.so)
        symbol not found: ap_send_http_header           (./libphp4.so)
        symbol not found: ap_log_error          (./libphp4.so)
        symbol not found: ap_block_alarms               (./libphp4.so)
        symbol not found: ap_register_cleanup           (./libphp4.so)
        symbol not found: ap_unblock_alarms             (./libphp4.so)
        symbol not found: ap_getword            (./libphp4.so)
        symbol not found: ap_uudecode           (./libphp4.so)
        symbol not found: ap_getword_nulls_nc           (./libphp4.so)
        symbol not found: ap_popenf             (./libphp4.so)
        symbol not found: ap_log_reason         (./libphp4.so)
        symbol not found: ap_setup_client_block         (./libphp4.so)
        symbol not found: ap_update_mtime               (./libphp4.so)
        symbol not found: ap_set_last_modified          (./libphp4.so)
        symbol not found: ap_set_etag           (./libphp4.so)
        symbol not found: ap_chdir_file         (./libphp4.so)
        symbol not found: ap_add_common_vars            (./libphp4.so)
        symbol not found: ap_add_cgi_vars               (./libphp4.so)
        symbol not found: ap_kill_timeout               (./libphp4.so)
        symbol not found: ap_pclosef            (./libphp4.so)
        symbol not found: ap_add_version_component              (./libphp4.so)
        symbol not found: ap_sub_req_lookup_uri         (./libphp4.so)
        symbol not found: ap_destroy_sub_req            (./libphp4.so)
        symbol not found: ap_run_sub_req                (./libphp4.so)
        symbol not found: __udivdi3             (./libphp4.so)
        symbol not found: __muldi3              (./libphp4.so)
[root@lolita libexec]# uname -a
SunOS lolita 5.6 Generic_105181-19 sun4u sparc SUNW,Ultra-4