Merge branch '2decomp-integration' of github.com:Nanoseb/x3d2 into 2d…

…ecomp-integration

cmake/Finddecomp2d.cmake

@@ -0,0 +1,27 @@
+# - Find the 2decomp-fft library
+find_package(decomp2d
+             PATHS ${CMAKE_SOURCE_DIR}/decomp2d/build)
+if (decomp2d_FOUND)
+  message(STATUS "2decomp-fft FOUND")
+else(decomp2d_FOUND)
+  message(STATUS "2decomp-fft PATH not available we'll try to download and install")
+  configure_file(${CMAKE_SOURCE_DIR}/cmake/decomp2d/downloadBuild2decomp.cmake.in decomp2d-build/CMakeLists.txt)
+  #message("Second CMAKE_GENERATOR ${CMAKE_GENERATOR}") 
+  execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+          RESULT_VARIABLE result
+          WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/decomp2d-build )
+  if(result)
+      message(FATAL_ERROR "CMake step for 2decomp-fft failed: ${result}")
+  else()
+      message("CMake step for 2decomp-fft completed (${result}).")
+  endif()
+  execute_process(COMMAND ${CMAKE_COMMAND} --build .
+         RESULT_VARIABLE result
+          WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/decomp2d-build )
+  if(result)
+      message(FATAL_ERROR "Build step for 2decomp-fft failed: ${result}")
+  endif()
+  set(D2D_ROOT ${CMAKE_CURRENT_BINARY_DIR}/decomp2d-build/downloadBuild2decomp-prefix/src/downloadBuild2decomp-build)
+  find_package(decomp2d REQUIRED
+	  PATHS ${D2D_ROOT})
+endif(decomp2d_FOUND)

cmake/decomp2d/downloadBuild2decomp.cmake.in

@@ -0,0 +1,26 @@
+# downloadBuild2decomp.cmake.in
+#
+cmake_minimum_required(VERSION 3.0.2)
+
+project(downloadBuild2decomp NONE)
+
+include(ExternalProject)
+
+ExternalProject_Add(downloadBuild2decomp
+    GIT_REPOSITORY    "https://github.com/xcompact3d/2decomp-fft"
+    GIT_TAG           "v2.0.3"
+    SOURCE_DIR        "${CMAKE_CURRENT_BINARY_DIR}/decomp2d-src"
+    INSTALL_DIR       "${CMAKE_CURRENT_BINARY_DIR}/decomp2d-opt"
+    TEST_COMMAND      ""
+)
+
+#ExternalProject_Add(downloadBuild2decomp
+#    GIT_REPOSITORY    "https://github.com/xcompact3d/2decomp-fft"
+#    GIT_TAG           "main"
+#    CONFIGURE_COMMAND "cmake -S ${CMAKE_CURRENT_BINARY_DIR}/decomp2d-src "
+#    BUILD_COMMAND     ""
+#    INSTALL_COMMAND   ""
+#    TEST_COMMAND      ""
+#    SOURCE_DIR        "${CMAKE_CURRENT_BINARY_DIR}/decomp2d-src"
+#    BINARY_DIR        ""
+#    INSTALL_DIR       ""

src/CMakeLists.txt

@@ -76,6 +76,7 @@ endif()
 
 if (${POISSON_SOLVER} STREQUAL "FFT" AND ${BACKEND} STREQUAL "OMP")
   message(STATUS "Using the FFT poisson solver with 2decomp&fft")
+  set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
   find_package(decomp2d REQUIRED)
   include_directories(${decomp2d_INCLUDE_DIRS})
   target_link_libraries(decomp2d)