Yes,

I looked at this again and yes DYLD_LIBRARY_PATH is getting set to
include /usr/local even though I don't know where or what would have
set it. I removed the other libpng and pymol now works. Thank you very
much, I was about to reinstall OS X as a whole and try again.  Where
other than the automatically executed scripts in my home directory do
you look for environment variables in OS X?

Aaron
On 3/9/07, Martin Costabel <[EMAIL PROTECTED]> wrote:
> Daniel Johnson wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> >
> > On Mar 6, 2007, at 4:04 PM, aaron bryden wrote:
> >
> >> Okay, yes, i am seeing that even though locate didn't find the one in
> >> /usr/local it must be affecting the build. It still seems strange to
> >> me that the error can say it is loading the one in /sw/lib but that
> >> the version is wrong even though the version is correct.
> >
> > dyld loads symbols from the first matching library in its search
> > path. Since /usr/local/lib/libpng.3.dylib comes first, that's what
> > gets used, but since its compatibility_version is wrong, dyld just
> > throws up its hands and gives up. It never actually gets to the
> > symbols in /sw/lib/libpng.3.dylib. So yes, /sw/lib/libpng.3.dylib
> > could be loaded, but by then the symbols have already been resolved--
> > incorrectly.
>
> I have the habit of cursing dylib myself and of accusing it of
> misbehavior, but I don't think this analysis is correct. If a binary has
> been linked with /sw/lib/libpng.3.dylib, then this library is loaded by
> dylib, even if /usr/local/lib/libpng.3.dylib is present on the computer.
> If it isn't, there must be a reason. The reason can be that
>
> - either /usr/local/lib/libpng.3.dylib has already been loaded before by
> some other object, and then that object should be identified and rebuilt
>   linking to /sw/lib/libpng.3.dylib instead of
> /usr/local/lib/libpng.3.dylib. But the output Aaron showed does not
> indicate this scenario.
>
> - or that the environment variable DYLD_LIBRARY_PATH is set. There was a
> time when also DYLD_FALLBACK_LIBRARY_PATH could have this effect, even
> when it was not set explicitly, but I think this was the case only in
> some early versions of OSX 10.4 and associated xcode-2.0. Fink
> correspondingly used to set DYLD_FALLBACK_LIBRARY_PATH to an empty ":"
> for a while, but it doesn't do so any more.
>
> My bet is still that something in Aaron's startup scripts sets
> DYLD_LIBRARY_PATH. I don't know if he ever showed the output of
>
>    echo $DYLD_LIBRARY_PATH
>
> I would try to run
>
>    env DYLD_LIBRARY_PATH="" pymol
>
> and see what happens.
>
> --
> Martin
>
>
>
>
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