> On Mar 16, 2016, at 5:41 PM, Mick Jordan <[email protected]> wrote:
>
> On 3/16/16 2:33 PM, Simon Urbanek wrote:
>> Mick,
>>
>> the linked path is governed by the library itself - in particular the ID
>> entry of it. So, for example, R's libraries have:
>>
>> $ otool -L /Library/Frameworks/R.framework/Resources/lib/libRblas.dylib
>> /Library/Frameworks/R.framework/Resources/lib/libRblas.dylib:
>>
>> /Library/Frameworks/R.framework/Versions/3.2/Resources/lib/libRblas.dylib
>> (compatibility version 0.0.0, current version 0.0.0)
>>
>> /Library/Frameworks/R.framework/Versions/3.2/Resources/lib/libgfortran.3.dylib
>> (compatibility version 4.0.0, current version 4.0.0)
>>
>> /Library/Frameworks/R.framework/Versions/3.2/Resources/lib/libquadmath.0.dylib
>> (compatibility version 1.0.0, current version 1.0.0)
>> /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current
>> version 1197.1.1)
>>
>> Note the first line - that is the ID line. When you link against that
>> binary, that's what the resulting binary will refer to. I bet the FastR
>> binary doesn't have the correct ID - you can fix it using
>>
>> install_name_tool -id <id-entry> <library>
>>
>> so the above would be
>>
>> install_name_tool -id
>> /Library/Frameworks/R.framework/Versions/3.2/Resources/lib/libRblas.dylib
>> /Library/Frameworks/R.framework/Versions/3.2/Resources/lib/libRblas.dylib
>>
>> There a some projects that are clueless about OS X and require
>> DYLD_LIBRARY_PATH because they don't set the id correctly. That is a bug in
>> the library, you should never set DYLD_LIBRARY_PATH because it breaks the
>> search path very badly (it is NOT the same as LD_LIBRARY_PATH on unix which
>> people confuse a lot). A little more sane way is to use
>> DYLD_FALLBACK_LIBRARY_PATH which is more akin to LD_LIBRARY_PATH on Linux,
>> but only as a last resort.
>>
>>
> Thanks, our mails crossed, but I appreciate the explanation. It was a typo on
> DYLD. We did use to set the DYLD_FALLBACK_LIBRARY_PATH but we don't any more
> as it doesn't work on El Cap with shells in the path.
>
I recall we re-export DYLD_FALLBACK_LIBRARY_PATH in cases where it's needed -
e.g. rJava uses in configure:
DYLD_FALLBACK_LIBRARY_PATH=`"${RBIN}" --slave --vanilla -e
'cat(Sys.getenv("DYLD_FALLBACK_LIBRARY_PATH"))'`
export DYLD_FALLBACK_LIBRARY_PATH
>
> I was actually using install_name_tool -change in our build of the stats.so
> to patch up the refs to lapack and blas. Now I can nuke that as the id change
> will now get it right.
>
Ok, great.
Cheers,
Simon
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