Add FindGSF.cmake

Modules/FindGSF.cmake

@@ -0,0 +1,46 @@
+# SPDX-FileCopyrightText: 2023 SAP SE
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# This file is part of FEDEM - https://openfedem.org
+
+# This Find rule sets up for building the FEDEM solvers with
+# the GSF linear equation solver with out-of-core capabilities from DNVS.
+# The GSF module is not part of the Open FEDEM project itself.
+# Please contact developers@openfedem.org if you want to try it out.
+
+unset ( GSF_INCLUDE CACHE )
+unset ( GSF_LIBRARY CACHE )
+unset ( GSF_DLL CACHE )
+
+find_path ( GSF_INCLUDE
+            NAMES felinearsolver.mod
+            PATHS C:/DNVS/include $ENV{DNVS_HOME}/include
+            ${HOME}/.local/include /usr/local/include
+          )
+
+if ( GSF_INCLUDE )
+  message ( STATUS "Found GSF: ${GSF_INCLUDE}" )
+  find_library ( GSF_LIBRARY
+                 NAMES GSF
+                 PATHS C:/DNVS/lib $ENV{DNVS_HOME}/lib
+                 ${HOME}/.local/lib /usr/local/lib
+               )
+endif ( GSF_INCLUDE )
+
+if ( GSF_LIBRARY )
+  if ( WIN )
+    find_file ( GSF_DLL
+                NAMES GSF.dll
+                PATHS C:/DNVS/bin $ENV{DNVS_HOME}/bin
+                ${HOME}/.local/bin /usr/local/bin
+                NO_DEFAULT_PATH
+              )
+    message ( STATUS "Found GSF: ${GSF_LIBRARY} ${GSF_DLL}" )
+  else ( WIN )
+    message ( STATUS "Found GSF: ${GSF_LIBRARY}" )
+  endif ( WIN )
+  include_directories ( ${GSF_INCLUDE} )
+else ( GSF_LIBRARY )
+  message ( WARNING "Did NOT find GSF library, configuring without it." )
+endif ( GSF_LIBRARY )