[cmake] Find gmsh and the executable

cmake/modules/DumuxMacros.cmake

@@ -8,6 +8,7 @@ find_package(GLPK)
 find_package(Gnuplot)
 set(HAVE_GNUPLOT ${GNUPLOT_FOUND})
 find_package(Gstat)
+find_package(Gmsh)
 find_package(NLOPT)
 find_package(PTScotch)
 find_package(PVPython)

cmake/modules/FindGmsh.cmake

+# .. cmake_module::
+#
+#    Find the Gmsh meshing tool
+#
+#    You may set the following variables to modify the
+#    behaviour of this module:
+#
+#    :ref:`GMSH_ROOT`
+#       Path list to search for gmsh.
+#
+#    Sets the following variables:
+#
+#    :code:`gmsh_FOUND`
+#       True if the gmsh library was found.
+#
+#    :code:`GMSH_EXECUTABLE`
+#       Path to gmsh executable
+#
+# .. cmake_variable:: GMSH_ROOT
+#
+#   You may set this variable to have :ref:`FindGmsh` look
+#   for the gmsh library in the given path before inspecting
+#   system paths.
+#
+
+# look for header files, only at positions given by the user
+find_program(GMSH_EXECUTABLE
+  NAMES gmsh
+  PATHS "${GMSH_ROOT}"
+        "${CMAKE_SOURCE_DIR}/../"
+        "/usr/bin/"
+  PATH_SUFFIXES "src" "external/gmsh/src" "gmsh/src" "gmsh"
+  NO_DEFAULT_PATH
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(
+  "gmsh"
+  DEFAULT_MSG
+  GMSH_EXECUTABLE
+)
+
+# set macros for config.h
+set(HAVE_GMSH ${gmsh_FOUND})
+set(GMSH_EXECUTABLE ${GMSH_EXECUTABLE})
+
+# text for feature summary
+set_package_properties("Gmsh" PROPERTIES
+  DESCRIPTION "Meshing tool"
+  PURPOSE "Generate structured and unstructured grids")

config.h.cmake

@@ -58,6 +58,12 @@
 /* Define path to gstat executable */
 #cmakedefine GSTAT_EXECUTABLE "@GSTAT_EXECUTABLE@"
 
+/* Define to 1 if gmsh was found */
+#cmakedefine HAVE_GMSH 1
+
+/* Define path to gmsh executable */
+#cmakedefine GMSH_EXECUTABLE "@GMSH_EXECUTABLE@"
+
 /* Defines whether pvpython has been found */
 #cmakedefine HAVE_PVPYTHON 1