Merge pull request QMCPACK#3127 from ye-luo/fix-XL

Update XL build recipe.

config/build_olcf_summit_XL.sh

@@ -31,7 +31,7 @@ source_folder=..
 for name in offload_real_MP offload_real # offload_cplx offload_cplx_MP
 do
 
-CMAKE_FLAGS="-D CMAKE_BUILD_TYPE=$TYPE -D ENABLE_CUDA=1 -D CUDA_ARCH=sm_70 -D ENABLE_MASS=1 -D MASS_ROOT=/sw/summit/xl/16.1.1-5/xlmass/9.1.1 -D MPIEXEC_EXECUTABLE=`which jsrun` -D MPIEXEC_NUMPROC_FLAG='-n' -D MPIEXEC_PREFLAGS='-c;16;-g;1;-b;packed:16;--smpiargs=off'"
+CMAKE_FLAGS="-D CMAKE_BUILD_TYPE=$TYPE -D ENABLE_CUDA=1 -D CUDA_ARCH=sm_70 -D CUDA_HOST_COMPILER=/sw/summit/gcc/6.4.0/bin/gcc -D ENABLE_MASS=1 -D MASS_ROOT=/sw/summit/xl/16.1.1-5/xlmass/9.1.1 -D MPIEXEC_EXECUTABLE=`which jsrun` -D MPIEXEC_NUMPROC_FLAG='-n' -D MPIEXEC_PREFLAGS='-c;16;-g;1;-b;packed:16;--smpiargs=off'"
 
 if [[ $name == *"cplx"* ]]; then
   CMAKE_FLAGS="$CMAKE_FLAGS -D QMC_COMPLEX=1"

src/Platforms/CUDA/CUDATypeMapping.hpp

@@ -9,9 +9,12 @@
 // File created by: Peter Doak, [email protected], Oak Ridge National Laboratory
 //////////////////////////////////////////////////////////////////////////////////////
 
+
 #ifndef QMCPLUSPLUS_CUDA_TYPE_MAPPING_HPP
 #define QMCPLUSPLUS_CUDA_TYPE_MAPPING_HPP
 
+#include <type_traits>
+
 namespace qmcplusplus
 {
 // This namespace is to protect against the clash between this disjuntion and the std one