add h200 configuration (validated against MPI)

Author: Lesur Geoffroy

environements/h200.env

@@ -0,0 +1,14 @@
+
+# Use GCC12 to compile instead of default
+export CXX=/usr/bin/g++-12
+export CC=/usr/bin/gcc-12
+export CPP=/usr/bin/cpp-12
+
+# Use custom openmpi for cuda
+source /local/openmpi-cuda/bin/activate.sh
+
+export OMPI_MCA_btl_smcuda_use_cuda_ipc=0
+export OMPI_MCA_btl_openib_want_cuda_gdr=0
+
+export IDEFIX_GPU_FLAGS="-DKokkos_ENABLE_CUDA=ON -DKokkos_ARCH_HOPPER90=ON"
+