Install wddx extention for php 4.1.1

We tried to install php 4.1.1 with wddx support on our Solaris 2.8 with gcc 3.0. We installed expat library 1.2 (download from http://www.jclark.com/xml/expat.html) and wddx 1.0a. We also installed apache 1.3.22 which comes with expat support). We configure our php with the following options: --with-xml --enable-wddx --with-expat-dir=/depot/package/expat_1.2 However, we keep getting the following error messages: In file included from internal_functions.c:66: /site4/web_kit_1.0_rodgers/php_4.1.1/ext/wddx/php_wddx.h:26:19: expat.h: No such file or directory There is no header file called "expat.h" in either expat 1.2 package or apache 1.3.22 package. Did we install the wrong expat package? Which package do we have to install in order to get wddx compiled in php? Thanks, Ziying Sherwin P. S. I am not on this mailing list, please send your response to: sherwin@nlm.nih.gov