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January 2014

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Re: [Darshan-users] Error when using LD_PRELOAD (already solved)
by Phil Carns 14 Jan '14

14 Jan '14

I just reproduced this on an Ubuntu 13.10 box as well. It looks like the root problem is really the link order in the Makfile rule for lib/libdarshan.so. If I move the -ldl to the end of the command there and rebuild/reinstall then it works fine. I'm not going to commit that change in trunk until I have a chance to test on some other platforms (in case there was some reason that -ldl was listed so early in the first place), but I'll make sure it is resolved in the next release. -Phil On 01/09/2014 08:35 AM, Carns, Philip H. wrote: > Thanks for the tip Florin! > > -Phil > > On 12/18/2013 10:41 AM, Isaila, Florin D. wrote: >> Hi, >> >> I am sharing this as somebody else can bump into the same problem. >> >> I tried to use darshan shared library. After exporting LD_PRELOAD for >> /homes/fisaila/software/darshan/lib/libdarshan.so I had the following >> error in the shell: >> >> make: symbol lookup error: >> /homes/fisaila/software/darshan/lib/libdarshan.so: undefined symbol: >> dlsym >> >> The problem turned to be the default behavior of ld. In the >> darshan-runtime/Makefile I added -Wl,--no-as-needed to >> CFLAGS_SHARED (after -shared), recompiled and reinstalled the library >> and everything worked fine. >> >> I am on Ubuntu 12.04 with gcc version 4.6.3. >> >> Regards >> Florin >> _______________________________________________ >> Darshan-users mailing list >> Darshan-users(a)lists.mcs.anl.gov >> https://lists.mcs.anl.gov/mailman/listinfo/darshan-users > _______________________________________________ > Darshan-users mailing list > Darshan-users(a)lists.mcs.anl.gov > https://lists.mcs.anl.gov/mailman/listinfo/darshan-users

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Re: [Darshan-users] Error when using LD_PRELOAD (already solved)
by Phil Carns 09 Jan '14

09 Jan '14

Thanks for the tip Florin! -Phil On 12/18/2013 10:41 AM, Isaila, Florin D. wrote: > Hi, > > I am sharing this as somebody else can bump into the same problem. > > I tried to use darshan shared library. After exporting LD_PRELOAD for > /homes/fisaila/software/darshan/lib/libdarshan.so I had the following > error in the shell: > > make: symbol lookup error: > /homes/fisaila/software/darshan/lib/libdarshan.so: undefined symbol: > dlsym > > The problem turned to be the default behavior of ld. In the > darshan-runtime/Makefile I added -Wl,--no-as-needed to > CFLAGS_SHARED (after -shared), recompiled and reinstalled the library > and everything worked fine. > > I am on Ubuntu 12.04 with gcc version 4.6.3. > > Regards > Florin > _______________________________________________ > Darshan-users mailing list > Darshan-users(a)lists.mcs.anl.gov > https://lists.mcs.anl.gov/mailman/listinfo/darshan-users

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