Allow CMake to set CHOW_PATEL variables

CMakeLists.txt

@@ -26,6 +26,9 @@ option(BUILD_FLOW_POLY_GRID "Build flow blackoil with polyhedral grid" OFF)
 option(OPM_ENABLE_PYTHON "Enable python bindings?" OFF)
 option(OPM_ENABLE_PYTHON_TESTS "Enable tests for the python bindings?" ON)
 option(ENABLE_FPGA "Enable FPGA kernels integration?" OFF)
+option(USE_CHOW_PATEL_ILU "Use the iterative ILU by Chow and Patel?" OFF)
+option(USE_CHOW_PATEL_ILU_GPU "Run iterative ILU decomposition on GPU? Requires USE_CHOW_PATEL_ILU" OFF)
+option(USE_CHOW_PATEL_ILU_GPU_PARALLEL "Try to use more parallelism on the GPU during the iterative ILU decomposition? Requires USE_CHOW_PATEL_ILU_GPU_PARALLEL" OFF)
 
 if(SIBLING_SEARCH AND NOT opm-common_DIR)
   # guess the sibling dir
@@ -211,6 +214,24 @@ if(OpenCL_FOUND)
     set(OpenCL_FOUND OFF)
     set(OPENCL_FOUND OFF)
   endif()
+  if(USE_CHOW_PATEL_ILU)
+    add_compile_options(-DCHOW_PATEL=1)
+    if(USE_CHOW_PATEL_ILU_GPU)
+      add_compile_options(-DCHOW_PATEL_GPU=1)
+      if(USE_CHOW_PATEL_ILU_GPU_PARALLEL)
+        add_compile_options(-DCHOW_PATEL_GPU_PARALLEL=1)
+      else()
+        add_compile_options(-DCHOW_PATEL_GPU_PARALLEL=0)
+      endif()
+    else()
+      add_compile_options(-DCHOW_PATEL_GPU=0)
+      add_compile_options(-DCHOW_PATEL_GPU_PARALLEL=0)
+    endif()
+  endif()
+else()
+  if(USE_CHOW_PATEL_ILU)
+    message(FATAL_ERROR " CHOW_PATEL_ILU only works for openclSolver, but OpenCL was not found")
+  endif()
 endif()
 
 find_package(amgcl)
@@ -242,6 +263,7 @@ if(OpenCL_FOUND)
   endif()
 endif()
 
+
 # read the list of components from this file (in the project directory);
 # it should set various lists with the names of the files to include
 include (CMakeLists_files.cmake)