Undefined symbol error on loading a module in Apache that uses libxml2

Question

Hello everyone!

I am writing an Apache 2.2 module that uses the libxml2 API. I have compiled the module using following commands:

apxs -I /usr/include/libxml2/ -c mod_xmltest.c
sudo apxs -n xmltest_module -i mod_xmltest.la

and used the following LoadFile directive in httpd.conf

LoadFile /usr/lib/libxml2.so

However on starting the server I am getting following error:

httpd: Syntax error on line 432 of /usr/local/apache2/conf/httpd.conf: Cannot load /usr/local/apache2/modules/mod_hoverin.so into server: /usr/local/apache2/modules/mod_hoverin.so: undefined symbol: xmlFreeNode

what could be wrong here ?

Answer 1

ok sorry! It was a silly question to ask!

Just came to know that the order of directives is important in the configuration file. I was trying to load the modules before loading the libraries.

Corrected it, the error is gone :)