Hi all,

I got error while installing GTL-1.2.4 in ubuntu 11.04.
My gcc version is 4.5.2

The ./configure runs good. But after that when I run make, I get the following error:

In file included from ../include/GTL/node.h:13:0,
                 from ../include/GTL/node_data.h:13,
                 from edge.cpp:9:
../include/GTL/edge.h:135:23: error: 'ostream' does not name a type
In file included from ../include/GTL/node_data.h:13:0,
                 from edge.cpp:9:
../include/GTL/node.h:234:23: error: 'ostream' does not name a type
edge.cpp: In function 'std::ostream& GTL::operator<<(std::ostream&, const GTL::edge&)':
edge.cpp:38:24: error: no match for 'operator<<' in 'os << ((const GTL::edge*)e)->GTL::edge::source()'

Here is the download link from where I downloaded GTL:

http://www.fim.uni-passau.de/fileadmin/files/lehrstuhl/brandenburg/projekte/gtl/GTL-1.2.4-lgpl.tar.gz

I hope somebody could help.
Thanks.