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 [email protected] https://lists.mcs.anl.gov/mailman/listinfo/darshan-users

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