First of all, thanks for the help everyone.
I have done that command, and this is what I got:
ldd doomrl
linux-gate.so.1 => (0xffffe000)
libm.so.6 => /lib32/libm.so.6 (0xf7f08000)
libSDL-1.2.so.0 => /usr/lib32/libSDL-1.2.so.0 (0xf7e79000)
libSDL_mixer-1.2.so.0 => /usr/lib32/libSDL_mixer-1.2.so.0 (0xf7e0a000)
libpthread.so.0 => /lib32/libpthread.so.0 (0xf7df3000)
libX11.so.6 => /usr/lib32/libX11.so.6 (0xf7d02000)
libc.so.6 => /lib32/libc.so.6 (0xf7bc1000)
/lib/ld-linux.so.2 (0xf7f4b000)
libasound.so.2 => /usr/lib32/libasound.so.2 (0xf7afc000)
libdl.so.2 => /lib32/libdl.so.2 (0xf7af8000)
libdirectfb-0.9.so.25 => /usr/lib32/libdirectfb-0.9.so.25 (0xf7aa0000)
libfusion-0.9.so.25 => /usr/lib32/libfusion-0.9.so.25 (0xf7a9a000)
libdirect-0.9.so.25 => /usr/lib32/libdirect-0.9.so.25 (0xf7a8b000)
libvorbisfile.so.3 => not found
libvorbis.so.0 => not found
libogg.so.0 => not found
libsmpeg-0.4.so.0 => not found
libXau.so.6 => /usr/lib32/libXau.so.6 (0xf7a87000)
libXdmcp.so.6 => /usr/lib32/libXdmcp.so.6 (0xf7a82000)
I have not been playing with ldconfig, at least not consciously. About the different behaviour, executing doomrl_konsole only opens a new konsole window that gets closed a millisecond later, but I get no messages.
It seems like it does not find some files up there, is there any way to fix that, please?