OK so I tried to run simutrans on my new 64-bit Ubuntu box… and got this:
$ ./sim99-18-1671
./sim99-18-1671: error while loading shared libraries: libSDL-1.2.so.0: cannot open shared object file: No such file or directory
If you look at which libraries are actually being loaded, this way:
$ ldd ./sim99-18-1671
linux-gate.so.1 => (0xffffe000)
libz.so.1 => /usr/lib32/libz.so.1 (0xf7fac000)
libSDL-1.2.so.0 => not found
libpthread.so.0 => /lib32/libpthread.so.0 (0xf7f93000)
libSDL_mixer-1.2.so.0 => not found
libstdc++.so.6 => not found
libm.so.6 => /lib32/libm.so.6 (0xf7f6e000)
libgcc_s.so.1 => /usr/lib32/libgcc_s.so.1 (0xf7f63000)
libc.so.6 => /lib32/libc.so.6 (0xf7e13000)
/lib/ld-linux.so.2 (0xf7fd1000)
…you’ll see that several libraries aren’t found, and that the other libraries that are found are 32-bit (in /lib32)… not the system standard 64-bit (in /lib).
To overcome this, we’ll have to:
$ sudo apt-get install apt-file
$ sudo apt-file update
$ sudo apt-file –architecture i386 search libSDL-1.2.so.0
ia32-libs: /usr/lib32/libSDL-1.2.so.0
[...more listing here...]
$ sudo apt-get install ia32-libs
and likewise for any other missing 32-bit libraries.