configured php with default mysql (for now) and pointed axps to my apache1.3.17 tree. The make showed no errors. The make install failed with:

Making install in sapi
Making install in apache
        /bin/sh /u/klein/dev/php-4.0.4pl1/libtool --silent --mode=compile gcc  -I. -I/u/klein/dev/php-4.0.4pl1/sapi/apache -I/u/klein/dev/php-4.0.4pl1/main -I/u/klein/dev/php-4.0.4pl1 -I/usr/local/apache_1.3.17/include -I/u/klein/dev/php-4.0.4pl1/Zend -I/u/klein/dev/php-4.0.4pl1/ext/mysql/libmysql -I/u/klein/dev/php-4.0.4pl1/ext/xml/expat/xmltok -I/u/klein/dev/php-4.0.4pl1/ext/xml/expat/xmlparse -I/u/klein/dev/php-4.0.4pl1/TSRM  -DAIX=42 -DAIX_BIND_PROCESSOR -DUSE_HSREGEX -DUSE_EXPAT -DXML_BYTE_ORDER=21 -O2  -c sapi_apache.c
In file included from /usr/local/apache_1.3.17/include/ap_config.h:117,
                 from /usr/local/apache_1.3.17/include/httpd.h:72,
                 from sapi_apache.c:32:
/usr/local/apache_1.3.17/include/os.h:123: conflicting types for `dlerror'
/usr/include/dlfcn.h:35: previous declaration of `dlerror'
make: 1254-004 The error code from the last command is 1.


Stop.
make: 1254-004 The error code from the last command is 1.


Stop.
make: 1254-004 The error code from the last command is 1.


Stop.
make: 1254-004 The error code from the last command is 1.


Stop.