Looking at the SPEC file for php-3.0.18-1.6.x it suggests that all I need
to do to build a mysql PHP module is to change the define at the top.  This
is not the case as there is other missing information to be able to build
the mysql module.

Here is the missing info as a patch file:

--- php.spec    Fri Jan 19 11:01:28 2001
+++ php.spec-rwm        Tue Mar 27 22:31:49 2001
@@ -48,6 +48,21 @@
 The php-manual package provides comprehensive documentation for the
 PHP3 HTML-embedded scripting language, in HTML format.
 
+# MySQL module
+%if %{mysql}
+%package mysql
+Obsoletes: mod_php3-mysql
+Group: System Environment/Daemons
+Summary: A MySQL database module for PHP3
+Prereq: php = %{version}
+
+%description mysql
+The php-mysql package includes a dynamic shared object (DSO) that can
+be compiled in to the Apache Web server to add mysql database
+support to PHP3.
+%endif
+
+
 %package pgsql
 Group: System Environment/Daemons
 Prereq: php = %{version}
@@ -114,6 +129,8 @@
        --with-system-regex \
        --disable-debug \
        --with-zlib \
+       --with-dbase \
+       --with-filepro \
        --with-gdbm \
        --with-db2 \
        --enable-debugger \
@@ -121,7 +138,6 @@
        --enable-track-vars \
        --enable-sysvsem \
        --enable-sysvshm \
-       --enable-track-vars \
        --with-xml \
        --with-ftp
 


Note: While not a bug, I also note that --enable-track-vars was included
twice in the configure line.