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jirina
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Brown Belt
November 11, 2008 2:59 AM PST
Error while loading shared libraries: libiomp5.so

I am trying to create an application in the following way:

ifort -fixed -extend_source 132 -openmp -fpscomp general -warn declarations -assume byterecl -threads -align all -heap-arrays file1.for file2.for ... fileN.for -o MyApp.out

After I start the application, I get the error 'Error while loading shared libraries: libiomp5.so'.

I updated my .bash_profile to include

source /opt/intel/Compiler/11.0/044/bin/ifortvars.sh ia32

and added also

export PATH=/opt/intel/Compiler/11.0/044/lib/ia32:$PATH

because this path contains libiomp5.so, but I am still getting the same error message.

What am I doing wrong? Please note that I am a complete newbie in Linux and Intel Fortran in Linux, so my questions might be quite stupid :-[Is there any way how to "link a library to an application" so that the application can be distributed?

af123_af007
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November 11, 2008 4:20 AM PST
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#1

Did you set the LD_LIBRARY_PATH?
tim18
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Black Belt
November 11, 2008 5:40 AM PST
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#2 Reply to #1
Quoting - af123_af007

Did you set the LD_LIBRARY_PATH?

Unlike Windows, where shared libraries may be found on PATH, linux PATH is not used for that purpose.  The ifortvars script sets both PATH and LD_LIBRARY_PATH, so it is useful both at compile and at run time.
jirina
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November 12, 2008 10:38 AM PST
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#3 Reply to #2

I am running this in my .bash_profile:

source /opt/intel/Compiler/11.0/044/bin/ifortvars.sh ia32

I checked that PATH contains

/opt/intel/Compiler/11.0/044/bin/ia32

However, I did not find LD_LIBRARY_PATH, just LIBRARY_PATH, containing

/opt/intel/Compiler/11.0/044/mkl/lib/32

However, this directory does not contain libiomp5.so which is reported to be missing when I try starting my

application.

I tried adding /opt/intel/Compiler/11.0/044/lib/ia32 to LIBRARY_PATH, because I found libiomp5.so in that

directory, but this did not help.

Finally, I tried following:

export LD_LIBRARY_PATH=/opt/intel/Compiler/11.0/044/lib/ia32:$LD_LIBRARY_PATH

which made my application work!

Does this mean that ifortvars.sh does not work well and specifies LIBRARY_PATH instead of LD_LIBRARY_PATH, in

addition containg incorrect path ?

Another question is what I should do to be able to distribute my application to other people who don't have

Intel Fortran installed.

Thank you in advance for any help.
tim18
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November 12, 2008 11:04 AM PST
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|Best Answer
#4 Reply to #3

If your ifortvars script does not set LD_LIBRARY_PATH, it looks like an installation failure.

I don't think the  beta version provides for distributing your application.  When you have a standard license for the released version, you have the choice of -static-intel to avoid use of .so from the ifort installation, or the right to send the necessary .so files (check with ldd) with your  file.
jirina
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November 12, 2008 1:13 PM PST
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#5 Reply to #4

Thank you for your ideas. I reinstalled Intel Fortran from 11.044 to 11.069, there were no problems with the installation, and after running ifortvars.sh (source /opt/intel/Compiler/11.0/069/bin/ifortvars.sh ia32) I have everything correct. There seems to be a problem with running the script in .bash_profile, which I tried to run the script automatically after the login.
bgeneto
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August 26, 2009 9:36 AM PDT
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#6 Reply to #5
Quoting - jirina

There seems to be a problem with running the script in .bash_profile, which I tried to run the script automatically after the login.


I don't think that was the problem. I had exactly the same problem with LD_LIBRARY_PATH not been set by ifort 11.1.038 under Ubuntu linux 9.04 x64. Running the ifortvars script manually or automatically sets only LIBRARY_PATH, not the correct environment variable LD_LIBRARY_PATH required in order to run your application in parallel. I think the ifortvars.sh script should be carefully revised for linux, meanwhile one solution is to add the following line in your .bashrc (local) or /etc/profile (global) file (just after calling ifortvars.sh with source command):

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$LIBRARY_PATH


Good luck!


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