Compilation failed in cuda_piMemBufferPartition: type qualifiers ignored on cast result type

[christgau]

On CentOS 7 with a "self-made" GCC 9.1 and CMake 3.16.4, I observe an compilation error:

/home/christgau/src/intel/llvm/src/sycl/plugins/cuda/pi_cuda.cpp: In function ‘pi_result cuda_piMemBufferPartition(pi_mem, pi_mem_flags, pi_buffer_create_type, void*, _pi_mem**)’:
/home/christgau/src/intel/llvm/src/sycl/plugins/cuda/pi_cuda.cpp:1623:67: error: type qualifiers ignored on cast result type [-Werror=ignored-qualifiers]
       *reinterpret_cast<const pi_buffer_region>(buffer_create_info);
                                                                   ^
cc1plus: all warnings being treated as errors

The mentioned line was introduced with 249e57b.

I use the buildbot scripts to configure and build the compiler.

SYCL_HOME=$HOME/src/intel/llvm

build_dir=$SYCL_HOME/build

mkdir -p $build_dir

python $SYCL_HOME/src/buildbot/configure.py -s "$SYCL_HOME/src" -o "$build_dir" --cuda --cmake-opt="-DCUDA_TOOLKIT_ROOT_DIR=/opt/cuda/10.1"
python $SYCL_HOME/src/buildbot/compile.py -s "$SYCL_HOME/src" -o "$build_dir"

However when I compile with cmake as documented in older versions of the "Getting Started" Guide it compiles wihtout error. Maybe this is because of a more strict compilation mode in the buildbot scripts (no_werror=False).

[hiaselhans]

I think there are a bunch of these warnings in different/newer versions of gcc. See #1572 and others ...

quick fix is to use the buildbot scripts with --no-werror. does it help...?

[christgau]

quick fix is to use the buildbot scripts with --no-werror. does it help...?

Yes. It does. Also --no-assertions was helpful in my case as quick'n'dirty workaround for #1467.

Thanks. Closing this one...