On Wed, Mar 02, 2011 at 03:49:22PM +0100, Andreas Rottmann wrote: > ludo@gnu.org (Ludovic Courtès) writes: > > > Hi, > > > > Aidan Gauland writes: > > > >> I'm trying to use SDL through Guile's dynamic FFI. There's a slight > >> nuisance with the procedure `dynamic-link': the name of the so file on > >> my system (Debian squeeze) is `libSDL-1.2.so.0' > > > > Isn’t it a packaging bug? There should be a > > ‘libSDL-1.2.so’ -> ‘libSDL-1.2.so.0’ symlink. > > > Only in the -dev package, which should not be required for running Guile > programs that excercise the FFI. It is also good practice to use the > entire SONAME of the library in the Guile program, as to avoid random > breakage when the ABI changes (which does imply a SONAME bump on > sanely-maintained libraries). When I try to use the entire soname of the library, I get an error. (`libSDL-1.2.so.0' is actually a link to the regular file `libSDL-1.2.so.0.11.3'.) What am I doing wrong? Example session: GNU Guile 2.0.0 Copyright (C) 1995-2011 Free Software Foundation, Inc. Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'. This program is free software, and you are welcome to redistribute it under certain conditions; type `,show c' for details. Enter `,help' for help. scheme@(guile-user)> (define sdl (dynamic-link "libSDL-1.2.so.0.11.3")) ERROR: In procedure dynamic-link: ERROR: In procedure dynamic-link: file: "libSDL-1.2.so.0.11.3", message: "file not found" Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue. scheme@(guile-user) [1]> ,bt In current input: 1:0 1 (#:1:0 ()>) In unknown file: 0 (dynamic-link "libSDL-1.2.so.0.11.3") scheme@(guile-user) [1]> ,q scheme@(guile-user)> ,q By the way, there is a symlink libSDL.so -> libSDL-1.2.so.11.3, so there is no packaging bug. Now I'm trying to figure out how to do as Andreas says and use the entire soname of the library. --Aidan