Forum OpenACS Development: install libthread with ubuntu aolserver packages

since I had to solve this twice now, I though, I might share this here.
If you use the aolserver4 and aolserver4-dev packages that come with ubuntu, and want to install libthread, you have to copy the header files, so that the libhtread configure script can find them

sudo cp /usr/include/aolserver4/* /usr/lib/aolserver4/include

wget http://mesh.dl.sourceforge.net/sourceforge/tcl/thread2.6.5.tar.gz
tar -xzf thread2.6.5.tar.gz
cd thread2.6.5/unix
../configure --enable-threads --prefix=/usr/lib/aolserver4 --exec-prefix=/usr/lib/aolserver4 --with-aolserver=/usr/lib/aolserver4 --with-tcl=/usr/lib/tcl8.4
make
sudo make install