I seem to have found a workaround - use panda1.8.1
I tried forcing the installation of panda1.9_1.9.0 (dpkgi -i --force-depends) but upon trying to run the hello world program it complained of not being able to find panda3d.core. Which I attributed to the deb not linking against libc (I have no idea if that’s the case or not).
So I thought I’d try panda1.8.1. After compiling it’s deb also complained of the unmet dependency, however upon forcing this time the hello world program worked.
Still unsure of what went/is wrong, hopefully I will not encounter problems later.
NOTE: to integrate bullet and librocket you should install (before panda) the packages getting them from their git repos (github.com/consultit/my_librocket.git) or, if you want, you could intall them from my custom git repos (where sources are the same as original ones and quite updated, and only build system is changed to my own based on autotools), following these instructions:
-install the ‘GNU Autoconf Archive’:
$ git clone git://git.sv.gnu.org/autoconf-archive.git
$ cd autoconf-archive
$ ./bootstrap.sh
$ ./configure --prefix=/usr
$ make maintainer-all
$ sudo make install
-install Bullet:
$ git clone https://github.com/consultit/my_bullet3.git
$ cd my_bullet3
$ autoreconf -i -v
$ mkdir build-release
$ cd build-release
$ ../configure --enable-demos
$ make
$ sudo make install
install libRocket:
$ git clone https://github.com/consultit/my_librocket.git
$ cd my_librocket
$ autoreconf -i -v
$ mkdir build-release
$ cd build-release
$ ../configure --enable-python --enable-samples --enable-extra-samples
$ make
$ sudo make install