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Unable to use .so library in other folder than in $FOAM_USER_LIBBIN

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Old   June 4, 2021, 11:39
Default Unable to use .so library in other folder than in $FOAM_USER_LIBBIN
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Saideep
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Hi all,


I have an issue linking a third party library to my solver.


I have a library having named libTP.so. I placed this library in my $FOAM_USER_LIBBIN and compiled my solver. Later ran the solver. Everything works perfect. The $(FOAM_USER_LIBBIN) is the folder in $WM_PROJECT_USER_DIR/platforms/linux64GccDPInt32Opt/lib.


Now, within the $FOAM_USER_LIBBIN, I try to create a new folder named 'lp' and copy the library (libTP.so) into this folder. Duely, I make changes to the Make/options file of the solver by adding the path:
Code:
-L$(FOAM_USER_LIBBIN)/lp -lTP \
But this doesnt work and I dont understand why. I am giving the right path and the compilation is successful. When I try to run the solver I get the following missing library error which is bizarre as the compiler can find it.
Code:
cVeFoam: error while loading shared libraries: libTP.so: cannot open shared object file: No such file or directory
Can anyone let me know where am I going wrong?



Thanks!!
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Old   September 15, 2021, 09:22
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Joachim Herb
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Too late, but perhaps it helps somebody else:

Your solver looks at runtime(!) in the directories given in by the environment LD_LIBRARY_PATH. This normaly includes the directory corresponding to $FOAM_USER_LIBBIN but not $FOAM_USER_LIBBIN/lp.

During compilation, to you advise the linker to look at that directory and so you get no error during linking.
So to solve your problem, you have to add this directory to LD_LIBRARY_PATH:
Code:
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$FOAM_USER_LIBBIN/lp
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