Add externals for Cupla 0.2.0

Cupla [Qapla'] is a simple user interface for the platform independent
parallel kernel acceleration library alpaka. It follows a similar
concept as the NVIDIA® CUDA® API by providing a software layer to
manage accelerator devices. alpaka is used as backend for cupla.

See https://github.com/ComputationalRadiationPhysics/cupla/blob/master/README.md
for more information.

See https://github.com/ComputationalRadiationPhysics/cupla/releases
forthe latest changes.

cupla-toolfile.spec

@@ -0,0 +1,45 @@
+### RPM external cupla-toolfile 1.0
+Requires: cupla
+
+%prep
+
+%build
+
+%install
+
+mkdir -p %i/etc/scram.d
+cat << \EOF_TOOLFILE >%i/etc/scram.d/cupla.xml
+<tool name="cupla" version="@TOOL_VERSION@">
+  <use name="boost"/>
+  <client>
+    <environment name="CUPLA_BASE" default="@TOOL_ROOT@"/>
+    <environment name="INCLUDE"    default="$CUPLA_BASE/include"/>
+    <environment name="LIBDIR"     default="$CUPLA_BASE/lib"/>
+  </client>
+</tool>
+EOF_TOOLFILE
+
+cat << \EOF_TOOLFILE >%i/etc/scram.d/cupla-serial.xml
+<tool name="cupla-serial" version="@TOOL_VERSION@">
+  <use name="cupla"/>
+  <flags CXXFLAGS="-DALPAKA_ACC_CPU_B_SEQ_T_SEQ_ENABLED -DCUPLA_STREAM_ASYNC_ENABLED=0"/>
+</tool>
+EOF_TOOLFILE
+
+cat << \EOF_TOOLFILE >%i/etc/scram.d/cupla-tbb.xml
+<tool name="cupla-tbb" version="@TOOL_VERSION@">
+  <use name="cupla"/>
+  <use name="tbb"/>
+  <flags CXXFLAGS="-DALPAKA_ACC_CPU_B_TBB_T_SEQ_ENABLED -DCUPLA_STREAM_ASYNC_ENABLED=1"/>
+</tool>
+EOF_TOOLFILE
+
+cat << \EOF_TOOLFILE >%i/etc/scram.d/cupla-cuda.xml
+<tool name="cupla-cuda" version="@TOOL_VERSION@">
+  <use name="cupla"/>
+  <use name="cuda"/>
+  <flags CXXFLAGS="-DALPAKA_ACC_GPU_CUDA_ENABLED -DCUPLA_STREAM_ASYNC_ENABLED=1"/>
+</tool>
+EOF_TOOLFILE
+
+## IMPORT scram-tools-post

cupla.spec

@@ -0,0 +1,48 @@
+### RPM external cupla 0.2.0
+
+Source: https://github.com/ComputationalRadiationPhysics/%{n}/archive/%{realversion}.tar.gz
+Requires: alpaka
+Requires: cuda
+Requires: tbb
+
+%prep
+%setup -n %{n}-%{realversion}
+
+%build
+mkdir build lib
+
+# remove the version of Alpaka bundled with Cupla
+rm -rf alpaka
+
+CXXFLAGS="-m64 -std=c++14 -g -O3 -DALPAKA_DEBUG=0 -I$CUDA_ROOT/include -I$TBB_ROOT/include -I$BOOST_ROOT/include -I$ALPAKA_ROOT/include -Iinclude"
+HOST_FLAGS="-pthread -fPIC -Wall -Wextra -Wno-unknown-pragmas -Wno-unused-parameter -Wno-unused-local-typedefs -Wno-attributes -Wno-reorder -Wno-sign-compare"
+NVCC_FLAGS="-w --generate-line-info --source-in-ptx --cudart=shared --expt-extended-lambda --expt-relaxed-constexpr -gencode arch=compute_35,code=sm_35 -gencode arch=compute_60,code=sm_60 -gencode arch=compute_70,code=sm_70"
+FILES=$(find src -type f -name *.cpp)
+
+# build the serial CPU backend
+mkdir build/seq-seq-sync
+for FILE in $FILES; do
+  g++ -DALPAKA_ACC_CPU_B_SEQ_T_SEQ_ENABLED -DCUPLA_STREAM_ASYNC_ENABLED=0 $CXXFLAGS $HOST_FLAGS -c $FILE -o build/seq-seq-sync/$(basename $FILE).o
+done
+
+# build the TBB CPU backend
+mkdir build/tbb-seq-async
+for FILE in $FILES; do
+  g++ -DALPAKA_ACC_CPU_B_TBB_T_SEQ_ENABLED -DCUPLA_STREAM_ASYNC_ENABLED=1 $CXXFLAGS $HOST_FLAGS -c $FILE -o build/tbb-seq-async/$(basename $FILE).o
+done
+
+# build the CUDA GPU backend
+mkdir build/cuda-async
+for FILE in $FILES; do
+  nvcc -DALPAKA_ACC_GPU_CUDA_ENABLED -DCUPLA_STREAM_ASYNC_ENABLED=1 $CXXFLAGS $NVCC_FLAGS -Xcompiler "$HOST_FLAGS" -x cu -c $FILE -o build/cuda-async/$(basename $FILE).o
+done
+
+# link all backends in a single library
+g++ $CXXFLAGS $HOST_FLAGS build/*/*.o -L$CUDA_ROOT/lib64 -lcudart -L$TBB_ROOT/lib -ltbbmalloc -ltbb -shared -o lib/libcupla.so
+
+
+%install
+cp -ar include %{i}/include
+cp -ar lib %{i}/lib
+
+%post