> On Dec 10, 2015, at 5:19 PM, Hanspeter Niederstrasser > <f...@snaggledworks.com> wrote: > > > On Thu, December 10, 2015 3:49 pm, Alexander Hansen wrote: >> >>> On Dec 10, 2015, at 13:42, Jacques Bloch >>> <jacques.bl...@physik.uni-regensburg.de> wrote: >>> >>> Somehow i was able to use DYLD_LIBRARY_PATH with armadillo which i put >>> in ~/opt/lib on my system. >>> >>> Jacques >>> >>> Sent from my iPhone >> >> >> That may be implementation-dependent. If armadillo just wants _a_ >> DYLD_LIBRARY_PATH and doesnât rely on it being an environment variable, >> that may still work. >> >> Fionna:~ hansen$ DYLD_LIBRARY_PATH="/sw/lib" >> Fionna:~ hansen$ export DYLD_LIBRARY_PATH >> Fionna:~ hansen$ printenv DYLD_LIBRARY_PATH >> Fionna:~ hansen$ echo $DYLD_LIBRARY_PATH >> /sw/lib > > From what I understand, DYLD_LIBRARY_PATH still works, but it just doesn't > get passed to subshells. > > So > > DYLD_LIBRARY_PATH=/foo/lib /bin/sh BAR.sh > > will use /foo/lib successfully, but > > DYLD_LIBRARY_PATH=/foo/lib ./BAR.sh > > (where BAR.sh starts with #!/bin/sh) will fail. >
Specifically, all DYLD_* environment variables get removed when running any binary that is considered “protected”. That includes anything in /bin, /sbin, /usr/bin and /usr/sbin. So the problem is that you can’t pass DYLD_* to /bin/sh since it’s protected. If you were to use fink’s bash it WILL work since it isn’t protected but that would mean a dependency on bash. That’s kind of an expensive work around. DYLD_FALLBACK_LIBRARY_PATH is the one exception that does get passed but it’s useless for overriding an already installed library. Daniel
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