Re: [Starpu-devel] hwloc detection problem when configuring starpu-svn-trunk and starpu-1.2.0rc5

[Nathalie Furmento <nathalie.furmento@labri.fr>]

Ok, it seems that hwloc has been compiled with OpenCL. Here the error when 
configure checks the availability of the hwloc library.

configure:35295: /home/lschnorr/spack-orion/lib/spack/env/gcc/gcc -o conftest 
-O3 -g -O2 -gdwarf-2 -g3    -D_GNU_SOURCE  
-I/home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/include
  -gdwarf-2 -g3  
-L/home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib
 conftest.c -lhwloc  -lrt -lm -lpthread  >&5
/home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib/libhwloc.so:
 undefined reference to `clGetPlatformIDs@OPENCL_1.0'
/home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib/libhwloc.so:
 undefined reference to `clGetDeviceIDs@OPENCL_1.0'
/home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib/libhwloc.so:
 undefined reference to `clGetPlatformInfo@OPENCL_1.0'
/home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib/libhwloc.so:
 undefined reference to `clGetDeviceInfo@OPENCL_1.0'

The dirty fix would be to modify configure.ac and add the proper -l and -L 
options for OpenCL. Or better, set LDFLAGS with the appropriate value.

A better way would be to use pkgconfig to get the correct flags to use when 
compiling/linking with hwloc. Could you please send me the contents of the 
file
/home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib/pkgconfig/hwloc.pc

I will see how to modify configure.ac to use pkgconfig.

Thanks,

Nathalie

On Aug 17, 17:02, Lucas M. Schnorr wrote:

> Hi Nathalie,
> 
> On 08/17/2016 04:02 PM, Nathalie Furmento wrote:
> > Could you also please send the config.log file of StarPU?
> 
> Attached to this e-mail.
> 
> > configure.ac checks the availability of the library with
> > 
> >        LDFLAGS="${SAVED_LDFLAGS} -L$hwloc_dir/lib"
> > AC_HAVE_LIBRARY([hwloc],[have_valid_hwloc=yes],[have_valid_hwloc=no])
> > 
> > Could you check the contents of the directory 
> > /home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib
> > ?
> 
> Here are the contents:
> 
> lschnorr@orion-4:~/spack-orion$ find 
> /home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib
> /home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib
> /home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib/libhwloc.so
> /home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib/libhwloc.la
> /home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib/pkgconfig
> /home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib/pkgconfig/hwloc.pc
> /home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib/libhwloc.so.5
> /home/lschnorr/spack-orion/opt/spack/linux-x86_64/gcc-6.1.0/hwloc-1.11.3-j3wlufl4afo5kvid3vv4rutn55ljz2nx/lib/libhwloc.so.5.7.0
> 
> A+
> Lucas
> 
> -- 
> Lucas M. Schnorr, UFRGS
> http://www.inf.ufrgs.br/~schnorr/

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Dr Nathalie Furmento                         Ingénieur de recherche CNRS
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