[mvapich-discuss] Build issues with CUDA and hwloc

[Hari Subramoni]

Hello Vladimir,

Could you please let us know the configure command you used?

>From the error message I guess that the libcudart library is not installed
in the default system path. I would suggest adding the path to LDFLAGS.
Something like this...

LDFLAGS=-L/usr/local/lib -lcuda -L/opt/cuda/8.0/lib64 -lcudart -lgdsync
-lrt -lstdc++ -Wl,-rpath,/opt/cuda/8.0/lib64 -Wl,-rpath,/usr/local/lib'

MVAPICH2 relies on HWLOC for process to core mapping. We added HWLOC to
MVAPICH2 to ensure that all MVAPICH2 functionalities work irrespective of
what is available on the system.

Regards,
Hari.

On Fri, Oct 14, 2016 at 1:16 PM, Vladimir Florinski <vaf0001 at uah.edu> wrote:

> This is with mvapich2-2.2. When building with CUDA, the configure script
> in contrib/hwloc fails because the compiler is not passed the
> -L/path/to/libcudart option. Here is the relevant fragment of the
> config.log:
>
>
> configure:4222: checking whether the C compiler works
> configure:4244: gcc -O2 -g -pipe -Wall -Werror=format-security
> -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong
> --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/
> redhat/redhat-hardened-cc1 -m64 -mtune=generic -I/usr/local/cuda/include
> -I/home/vladimir/rpmbuild/BUILD/mvapich2-2.2/src/mpl/include
> -I/home/vladimir/rpmbuild/BUILD/mvapich2-2.2/src/mpl/incl
> ude -I/home/vladimir/rpmbuild/BUILD/mvapich2-2.2/src/openpa/src
> -I/home/vladimir/rpmbuild/BUILD/mvapich2-2.2/src/openpa/src -D_REENTRANT
> -I/home/vladimir/rpmbuild/BUILD/mvapich2-2.2/src/mpi/rom
> io/include -Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld
> conftest.c -lcudart -lcuda -libmad -lrdmacm -libumad -libverbs -ldl -lrt
> -lpmi2 -lpthread   >&5
> /usr/bin/ld: cannot find -lcudart
> collect2: error: ld returned 1 exit status
> configure:4248: $? = 1
> configure:4286: result: no
> configure: failed program was:
> | /* confdefs.h */
> | #define PACKAGE_NAME "hwloc"
> | #define PACKAGE_TARNAME "hwloc"
> | #define PACKAGE_VERSION "1.11.2rc2-git"
> | #define PACKAGE_STRING "hwloc 1.11.2rc2-git"
> | #define PACKAGE_BUGREPORT "http://www.open-mpi.org/projects/hwloc/"
> | #define PACKAGE_URL ""
> | #define PACKAGE "hwloc"
> | #define VERSION "1.11.2rc2-git"
> | /* end confdefs.h.  */
> |
> | int
> | main ()
> | {
> |
> |   ;
> |   return 0;
> | }
> configure:4291: error: in `/home/vladimir/rpmbuild/
> BUILD/mvapich2-2.2/contrib/hwloc':
> configure:4293: error: C compiler cannot create executables
>
> I also wonder why mvapich has to build hwloc in the first place. That is a
> common library that usually comes with the OS.
>
>
>
>
> --
> Vladimir Florinski
>
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> mvapich-discuss at cse.ohio-state.edu
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>
>
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