Merge branch 'issue/cmake-scotch-without-ptscotch' into 'master'

Fix cmake bug when Scotch is found but not PTScotch

See merge request !988

cmake/modules/AddPTScotchFlags.cmake

@@ -15,12 +15,20 @@ include_guard(GLOBAL)
 set(HAVE_PTSCOTCH ${PTScotch_FOUND})
 
 # register all PTScotch related flags
-if(PTScotch_FOUND)
+if(PTScotch_SCOTCH_FOUND)
+  dune_register_package_flags(LIBRARIES PTScotch::Scotch)
+endif()
+if(PTScotch_PTSCOTCH_FOUND)
   dune_register_package_flags(LIBRARIES PTScotch::PTScotch)
 endif()
 
 function(add_dune_ptscotch_flags _targets)
-  if(PTScotch_FOUND)
+  if(PTScotch_SCOTCH_FOUND)
+    foreach(_target ${_targets})
+      target_link_libraries(${_target} PUBLIC PTScotch::Scotch)
+    endforeach(_target ${_targets})
+  endif()
+  if(PTScotch_PTSCOTCH_FOUND)
     foreach(_target ${_targets})
       target_link_libraries(${_target} PUBLIC PTScotch::PTScotch)
     endforeach(_target ${_targets})

cmake/modules/FindMETIS.cmake

@@ -110,9 +110,9 @@ mark_as_advanced(METIS_INCLUDE_DIR METIS_LIBRARY METIS_NEEDS_LIBM METIS_API_VERS
 # Scotch provides METIS-3 interface only in version < 6.07, but provides an option to
 # select the API-version in later Scotch releases
 if(IS_SCOTCH_METIS_HEADER)
-  find_package(PTScotch COMPONENTS SCOTCH)
-  set(HAVE_SCOTCH_METIS ${PTScotch_FOUND})
-  if (PTScotch_FOUND AND NOT METIS_API_VERSION)
+  find_package(PTScotch)
+  set(HAVE_SCOTCH_METIS ${PTScotch_SCOTCH_FOUND})
+  if (PTScotch_SCOTCH_FOUND AND NOT METIS_API_VERSION)
     if(PTScotch_VERSION VERSION_LESS "6.0.7")
       set(METIS_API_VERSION "3")
     else()

cmake/modules/FindPTScotch.cmake

@@ -160,7 +160,7 @@ if(PTScotch_FOUND)
   endif()
 
   # Define an imported target for the parallel PTScotch library
-  if(PTScotch_PTSCOTCH_FOUND AND NOT TARGET PTScotch::PTScotch)
+  if(PTScotch_SCOTCH_FOUND AND PTScotch_PTSCOTCH_FOUND AND NOT TARGET PTScotch::PTScotch)
     add_library(PTScotch::PTScotch UNKNOWN IMPORTED)
     set_target_properties(PTScotch::PTScotch PROPERTIES
       IMPORTED_LOCATION ${PTSCOTCH_LIBRARY}

cmake/modules/FindParMETIS.cmake

@@ -91,9 +91,9 @@ set(PARMETIS_DEPENDENCIES METIS_FOUND MPI_FOUND)
 
 # If ptscotch-parmetis is requested, find package PTScotch
 if(IS_PTSCOTCH_PARMETIS_HEADER)
-  find_package(PTScotch COMPONENTS PTSCOTCH)
-  set(HAVE_PTSCOTCH_PARMETIS ${PTScotch_FOUND})
-  list(APPEND PARMETIS_DEPENDENCIES PTScotch_FOUND)
+  find_package(PTScotch)
+  set(HAVE_PTSCOTCH_PARMETIS ${PTScotch_PTSCOTCH_FOUND})
+  list(APPEND PARMETIS_DEPENDENCIES PTScotch_PTSCOTCH_FOUND)
 endif()
 
 # behave like a CMake module is supposed to behave
@@ -116,7 +116,7 @@ if(PARMETIS_FOUND AND NOT TARGET ParMETIS::ParMETIS)
   )
 
   # link against PTScotch if needed
-  if(IS_PTSCOTCH_PARMETIS_HEADER AND PTScotch_FOUND)
+  if(IS_PTSCOTCH_PARMETIS_HEADER AND PTScotch_PTSCOTCH_FOUND)
     set_property(TARGET ParMETIS::ParMETIS APPEND PROPERTY
       INTERFACE_LINK_LIBRARIES PTScotch::PTScotch)
   endif()