That dependency isn't being put in manually, it is automatic.
Basically, the system notices what the executable actually is linked
to:
$ ldd /usr/bin/pdf-presenter-console | wc -l
88
$ ldd /usr/bin/pdf-presenter-console | head -10
linux-vdso.so.1 (0x00007ffee66e2000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f08f603c000)
libgobject-2.0.so.0 =>
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007f08f5de8000)
libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0
(0x00007f08f5ad2000)
libgio-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
(0x00007f08f5734000)
libgee-0.8.so.2 => /usr/lib/x86_64-linux-gnu/libgee-0.8.so.2
(0x00007f08f546c000)
libpoppler-glib.so.8 =>
/usr/lib/x86_64-linux-gnu/libpoppler-glib.so.8 (0x00007f08f520f000)
libcairo.so.2 => /usr/lib/x86_64-linux-gnu/libcairo.so.2
(0x00007f08f4ef2000)
libgtk-3.so.0 => /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
(0x00007f08f45ec000)
libgdk-3.so.0 => /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
(0x00007f08f42f8000)
$ ldd /usr/bin/pdf-presenter-console | egrep -n gstream
17: libgstreamer-1.0.so.0 =>
/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0 (0x00007f97c8313000)
But I guess even though it's not actually linked to gstreamer1.0-gtk3,
it must be dynamically loaded when appropriate or something like that.
So it isn't strictly necessary for the program to run, but it does
enhance its functionality.
I guess ... need to look into the details I suppose ...
