Merge branch 'sadr_m-master-patch-57751' into 'master'

Update README.md

See merge request OPAL/opal-x/src!9

README.md

@@ -6,6 +6,7 @@
 
 ## Modules needed OPENMP build
 
+```
 cmake/3.25.2
 
 openmpi/4.1.5_slurm
@@ -25,20 +26,58 @@ gtest/1.13.0-1
 hdf5/1.10.8_slurm     
 
 gnutls/3.5.19
+```
+
 
 
 ## Clone repo and build opal-x with OPENMP 
 
-% git clone git@gitlab.psi.ch:OPAL/opal-x/src.git opal-x
+```
+$ git clone git@gitlab.psi.ch:OPAL/opal-x/src.git opal-x
+
+$ cd opal-x
+
+$ ./gen_OPALrevision
+```
+
+
+### To compile for OPENMP:
+```
+$ mkdir build_openmp && cd build_openmp
+$ cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_STANDARD=20  -DENABLE_SOLVERS=ON  -DENABLE_FFT=ON -DIPPL_PLATFORMS=openmp
+```
+
+
+### To compile for GPU, for example Amper80 on Gwendolen
+```
+$ mkdir build_cuda && cd build_cuda
+```
+
+in debug mode:
 
-% cd opal-x
+```
+$ cmake .. -DCMAKE_BUILD_TYPE=Debug -DIPPL_PLATFORMS=CUDA -DKokkos_ARCH_AMPERE80=ON -DCMAKE_CXX_STANDARD=20 -DENABLE_FFT=ON  -DENABLE_SOLVERS=ON
+```
 
-% ./gen_OPALrevision
+and release (optimized) mode:
+```
+$ cmake .. -DCMAKE_BUILD_TYPE=Release -DIPPL_PLATFORMS=CUDA -DKokkos_ARCH_AMPERE80=ON -DCMAKE_CXX_STANDARD=20 -DENABLE_FFT=ON  -DENABLE_SOLVERS=ON
+```
 
-% mkdir build_openmp && cd build_openmp
+### To compile for other GPU architecture, like Pascal on the Merlin's login node
+```
+$ mkdir build_cuda_login && cd build_cuda_login
+```
 
-% cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_STANDARD=20  -DENABLE_SOLVERS=ON  -DENABLE_FFT=ON -DIPPL_PLATFORMS=openmp
+in debug mode:
 
+```
+$ cmake .. -DCMAKE_BUILD_TYPE=Debug -DIPPL_PLATFORMS=CUDA -DKokkos_ARCH_PASCAL61=ON -DCMAKE_CXX_STANDARD=20 -DENABLE_FFT=ON  -DENABLE_SOLVERS=ON
+```
 
+and release (optimized) mode:
+```
+$ cmake .. -DCMAKE_BUILD_TYPE=Release -DIPPL_PLATFORMS=CUDA -DKokkos_ARCH_PASCAL61=ON -DCMAKE_CXX_STANDARD=20 -DENABLE_FFT=ON  -DENABLE_SOLVERS=ON
+```
 
 The documentation has been moved to the [Wiki](https://gitlab.psi.ch/OPAL/src/wikis/home).