Random number routines (MKL-VSL) and linking during compilation

Random number routines (MKL-VSL) and linking during compilation

Debanjan Mukherjee's picture
Debanjan Mukherjee
Tue, 08/07/2012 - 14:25

Hello, I have a module wherein I have a gaussian random number generator (that uses the VSL Gaussian generator from MKL Library). I am using that module now to write a small program that generates 10 random numbers. I am now having a whole bunch of issues to link the programs together to create an executable. I am using Mac OSX with 64 bit architecture and Intel processor. Here is the shell script I am using: The module: randomGenerator.f90 The program: testRandomGaussian.f90 The script:

#! /bin/sh

echo 'compiling an MKL random generator example'

MKLROOT=/opt/intel/composer_xe_2011_sp1.7.246/mkl/

MKLPATH=$MKLROOT/lib/

MKLINCLUDE=$MKLROOT/include/

DYLD_LIBRARY_PATH=$MKLPATH

ifort -c randomGenerator.f90 -L$MKLPATH -I$MKLINCLUDE -I$MKLINCLUDE/intel64/lp64 -lmkl_blas95_lp64 -lmkl_lapack95_lp64 -lmkl_intel_lp64 -lmkl_sequential -lmkl_core -liomp5

ifort -c testRandomGaussian.f90 -L$MKLPATH -I$MKLINCLUDE -I$MKLINCLUDE/intel64/lp64 -lmkl_blas95_lp64 -lmkl_lapack95_lp64 -lmkl_intel_lp64 -lmkl_sequential -lmkl_core -liomp5

ifort -L$MKLPATH -I$MKLINCLUDE -I$MKLINCLUDE/intel64/lp64 -lmkl_blas95_lp64 -lmkl_lapack95_lp64 -lmkl_intel_lp64 -lmkl_sequential -lmkl_core -liomp5 randomGenerator.o testRandomGaussian.o -o testRandomGaussian.out

The above creates the .out executable but when i run the .out file it ends up giving me an error saying:

dyld: Library not loaded: libmkl_intel_lp64.dylib Referenced from: /Users/debanjanmukherjee/Workfiles/Work/Simple-particle-OOP/sources/./testRandomGaussian.out Reason: image not found Trace/BPT trap: 5

dyld: Library not loaded: libmkl_intel_lp64.dylib Referenced from: /Users/debanjanmukherjee/Workfiles/Work/Simple-particle-OOP/sources/./testRandomGaussian.out Reason: image not foundTrace/BPT trap: 5 Can someone please offer some help t show what I am doing wrong? I can upload my codes too in case that is needed, but since the compilation completes I believe the code itself is okay and I have an error in the linking. Many thanks

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mecej4's picture
mecej4
Tue, 08/07/2012 - 17:16

There is no problem with compiling or linking.

The problem is related to the loading of the dynamically loaded libraries when your a.out is run and reaches a point where routines in those libraries are invoked. If the MKL *.dylib libraries are not accessible (in Linux this may be achieved by setting $LD_LIBRARY_PATH, or by modifying the ldd configuration file). The error messages are from the dynamic library loader. In looks in the usual system directories and does not find the needed .dylib files.

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Debanjan Mukherjee's picture
Debanjan Mukherjee
Tue, 08/07/2012 - 17:48

So what should I be doing to get this fixed ? Can I set LD_LIBRARY_PATH in Mac too ?

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Ying H (Intel)'s picture
Ying H (Intel)
Tue, 08/07/2012 - 20:03

Hi Debanjan,

The error message dyld: Library not loaded: libmkl_intel_lp64.dylib means the system can't find the library.

So whatever in Xcode environment (either4.0 or 3.2.4)or in terminal environment, to define DYLD_LIBRARY_PATH environment variable is required.

You candefinethe variable eitherby mklvars.* or define the DYLD_LIBRARY_PATH manually.

Please refer to http://software.intel.com/en-us/forums/showthread.php?t=106397&p=1#189389

Best Regards,
Ying

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