need help debugging wierd dlopen failure

[Jim Newton]

Hi Frank, thanks for the information.  If you always use /usr/local/lib
then what do you do when you need to run two different independent
applications which have different requirements?

On Tue, Sep 20, 2016 at 3:44 PM, Frank Goenninger <frgo at me.com> wrote:

> Am 20.09.2016 um 15:32 schrieb Luís Oliveira <luismbo at gmail.com>:
> >
> > On Tue, Sep 20, 2016 at 10:53 AM, Jim Newton <jimka.issy at gmail.com>
> wrote:
> >> CL-USER> (cffi::list-foreign-libraries)
> >> (...
> >> #<CFFI:FOREIGN-LIBRARY
> >>   :LIBCAIRO #P"/usr/local/Cellar/cairo/1.12.16_1/lib/libcairo.dylib"
> (truename=#P"/usr/local/Cellar/cairo/1.12.16_1/lib/libcairo.2.dylib")>)
> >> CL-USER>
> >>
> >> However, when I attempt to load libgdk-x11-2.0.0.dylib it complains
> that it cannot find a particular symbol in /usr/local/lib/libcairo.dylib.
> Why is it complaining about /usr/local/lib/libcairo.dylib?
> >
> > Most of those dylibs are symlinks and libgdk may depend on a name
> > which exists in /usr/local/lib but not /usr/local/Cellar, maybe? ldd
> > can tell you what a given dylib depends on.
>
> As Jim is on macOS there is no ldd. The command to use is
>
> otool -L /usr/local/lib//libcairo.dylib
>
> Seeing that Jim uses homebrew to install Cairo it is worth mentioning that
> brew install … also generates (normally) an entry in /usr/local/lib . That
> is why I always stick to using /usr/local/lib/libxyz.dylib paths when I
> want to ensure a particular library to be loaded.
>
> Best,
>    Frank
>
>
>
>
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