[Vm-dev] FFI is not finding libraries on Ubuntu 11.04

[David T. Lewis]

On Thu, May 26, 2011 at 01:24:09PM +0200, Igor Stasenko wrote:
> 
> On 26 May 2011 04:49, David T. Lewis <lewis at mail.msen.com> wrote:
> >
> > On Wed, May 25, 2011 at 03:55:25PM -0400, Matthew Fulmer wrote:
> >>
> >> X11Display class >> XOpenDisplay: displayName
> >> ?? ?? ?? "X11Display XOpenDisplay: nil"
> >> ?? ?? ?? <cdecl: X11Display* 'XOpenDisplay' (char*) module:'X11'>
> >> ?? ?? ?? ^self externalCallFailed
> >>
> >> It also results in a series of calls to bogus files:
> >>
> >> access("/etc/ld.so.nohwcap", F_OK) ?? ?? ??= -1 ENOENT (No such file or directory)
> >> open("/lib/i386-linux-gnu/X11", O_RDONLY) = -1 ENOENT (No such file or
> >> directory)
> >> open("/usr/lib/i386-linux-gnu/X11", O_RDONLY) = -1 ENOENT (No such
> >> file or directory)
> >> open("/lib/X11", O_RDONLY) ?? ?? ?? ?? ?? ?? ??= -1 ENOENT (No such file or directory)
> >> open("/usr/lib/sse2/X11", O_RDONLY) ?? ?? = -1 ENOENT (No such file or directory)
> >> open("/usr/lib/X11", O_RDONLY) ?? ?? ?? ?? ??= 8
> >>
> >> The library is actually at /usr/lib/i386-linux-gnu/libX11.so.6 , which
> >> is at least in whatever search path FFI seems to be using. It may have
> >> found the library had it been looking for the correct filename
> >
> > And if you change the declaration to the following, it works?
> >
> > ??<cdecl: X11Display* 'XOpenDisplay' (char*) module:'libX11.so.6'>
> >
> 
> yes, but if you change it like that, where the guarantees that it will
> work on another unix box?

Yes for sure, you would not want to declare it that way. I was
just checking my understanding of the problem. Thanks.

Dave