2009/2/13 Andrea Musuruane <musuruan(a)gmail.com&gt;: Fix are usually trivials. As explained in fedora-devel (search for gcc44 ) This is a common "missing headers" problem caused. To search which header defines the function and now needs to be explicitly included, do: cd /usr/include/c++ grep va_list * -R It will show you: 4.3.2/cstdarg: using ::va_list; Which means that you need to add: #include <cstdarg> in the header of the file that use the related function. Nicolas (kwizart)