gcc-6.3.0 support for OpenMP device pragmas

[Siegmar Gross]

Hi,

I have installed gcc-6.3.0 with support for OpenACC and OpenMP for
NVIDIA Quadro K2200 on my "SUSE Linux Enterprise Server 12.2 (x86_64)".
We use CUDA Toolkit 8.0. I've implemented a small program to compute
a dot product with OpenMP device pragmas. Unfortunately, my program
doesn't recognize my NVIDIA GPU.

loki OpenACC 272 gcc -fopenmp dot_prod_accel_OpenMP.c
loki OpenACC 273 a.out
Number of processors:     24
Number of devices:        0
Default device:           0
Execution on host device: yes
sum = 6.000000e+08
loki OpenACC 274



I used the following command to configure "gcc".

loki OpenACC 214 gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-6.3.0_accel/libexec/gcc/x86_64-pc-linux-gnu/6.3.0/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-6.3.0/configure --prefix=/usr/local/gcc-6.3.0_accel 
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu 
--target=x86_64-pc-linux-gnu 
--enable-offload-targets=nvptx-none=/usr/local/gcc-6.3.0_accel/bin 
--with-cuda-driver=/usr/local/cuda/ --enable-languages=c,c++,fortran,lto 
--enable-nls --enable-threads=posix --with-gmp-lib=/usr/local/lib64 
--with-gmp-include=/usr/local/include --with-mpfr-lib=/usr/local/lib64 
--with-mpfr-include=/usr/local/include --with-mpc-lib=/usr/local/lib64 
--with-mpc-include=/usr/local/include --with-isl-lib=/usr/local/lib64 
--with-isl-include=/usr/local/include
Thread model: posix
gcc version 6.3.0 (GCC)
loki OpenACC 215


Is something wrong with my program, do I need different/more command
line options, or doesn't gcc support offloading to a NVIDIA GPU with
OpenMP device pragmas? Thank you very much for any help in advance.


Kind regards

Siegmar
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