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Re: FFI nuisance
Re: FFI nuisance
Thu, 3 Mar 2011 07:43:39 +1300
On Wed, Mar 02, 2011 at 03:49:22PM +0100, Andreas Rottmann wrote:
> address@hidden (Ludovic Courtès) writes:
> > Hi,
> > Aidan Gauland <address@hidden> 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?
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
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue.
scheme@(guile-user) > ,bt
In current input:
1:0 1 (#<procedure a34a0d0 at <current input>:1:0 ()>)
In unknown file:
0 (dynamic-link "libSDL-1.2.so.0.11.3")
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.
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