MAGMA Forum

Posted: **Mon Oct 22, 2012 2:40 pm**

Hello

I am having some problems getting clMAGMA to compile, which I hope I can have some help with. When compiling clMAGMA I get the error:

Code: Select all

g++ -O0 -DADD_ -g -Wall -DHAVE_clAmdBlas -DHAVE_CBLAS -fPIC -Xlinker -zmuldefs  testing_zpotrf_gpu.o  -o testing_zpotrf_gpu lin/liblapacktest.a \
        -L../lib -lclmagma -lclmagmablas -L/usr/local/bin/acml/gfortran64/lib -L/usr/local/bin/acml/gfortran64_mp/lib -L/usr/local/bin/clAmdBlas/lib64 -lacml_mp -lacml_mv -lclAmdBlas -lOpenCL 
../lib/libclmagma.a(magmablas_z.o): In function `magma_zher2k':
/home/floyd/Downloads/amd/clmagma-0.3.0/interface_opencl/magmablas_z.cpp:378: undefined reference to `cblas_zher2k'
collect2: error: ld returned 1 exit status
make[1]: *** [testing_zpotrf_gpu] Error 1
make[1]: Leaving directory `/home/floyd/Downloads/amd/clmagma-0.3.0/testing'
make: *** [test] Error 2

It seems clMAGMA is not compatible with the ACML version 5.2 or clAmdBlas 1.8 or that I have made a mistake somewhere. I attached my make.ink just in case.

Thank you kindly,

Posted: **Thu Oct 25, 2012 5:14 am**

solenskiner wrote:g++ -O0 -DADD_ -g -Wall -DHAVE_clAmdBlas -DHAVE_CBLAS -fPIC -Xlinker -zmuldefs testing_zpotrf_gpu.o -o testing_zpotrf_gpu lin/liblapacktest.a \
-L../lib -lclmagma -lclmagmablas -L/usr/local/bin/acml/gfortran64/lib -L/usr/local/bin/acml/gfortran64_mp/lib -L/usr/local/bin/clAmdBlas/lib64 -lacml_mp -lacml_mv -lclAmdBlas -lOpenCL
../lib/libclmagma.a(magmablas_z.o): In function `magma_zher2k':
/home/floyd/Downloads/amd/clmagma-0.3.0/interface_opencl/magmablas_z.cpp:378: undefined reference to `cblas_zher2k'
collect2: error: ld returned 1 exit status
make[1]: *** [testing_zpotrf_gpu] Error 1
make[1]: Leaving directory `/home/floyd/Downloads/amd/clmagma-0.3.0/testing'
make: *** [test] Error 2

You're trying to compile source against cblas lib (-DHAVE_CBLAS) without linking it.
That function `cblas_zher2k' is referred to standard cblas lib, and not to clAmdBlas, so it can be provided in different ways.
If you're compiling under linux system, it will simply fix by installing gsl lib http://www.gnu.org/software/gsl/ on your machine and adding -lgsl when compiling that source. You can add -lgsl in make.inc here:

Code: Select all

...
LIB	  += -lOpenCL -lgsl -lclAmdBlas
...

Posted: **Thu Oct 25, 2012 1:41 pm**

Right, ACML doesn't provide CBLAS, which is a C-interface wrapper around the Fortran BLAS routines. You can obtain CBLAS from
http://www.netlib.org/blas/blast-forum/cblas.tgz
After installing CBLAS, add -lcblas to LIB in make.inc.
-mark

Posted: **Thu Dec 06, 2012 12:33 pm**

Oh sorry, thought i would get an email on response. I'll try that out this weekend. Thanks!

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