Provide find module to search for opm-core library

This find module is provided to help user programs locate an opm-core
library installation on their system; it is not used by opm-core itself.

Note that it has a direct dependency on the UseOpmFind and UseOpmPackage
helper modules; these must be in the CMAKE_MODULE_PATH also.

cmake/Modules/Findopm-core.cmake

@@ -0,0 +1,59 @@
+# - Find OPM core library
+#
+# Defines the following variables:
+#   opm-core_INCLUDE_DIRS    Directory of header files
+#   opm-core_LIBRARIES       Directory of shared object files
+#   opm-core_DEFINITIONS     Defines that must be set to compile
+#   opm-core_CONFIG_VARS     List of defines that should be in config.h
+#   HAVE_OPM_CORE            Binary value to use in config.h
+
+# Copyright (C) 2012 Uni Research AS
+# This code is licensed under The GNU General Public License v3.0
+
+# these packages must be found specially, since they require arguments
+include (UseOpmFind)
+find_and_append_package_to (opm-core SuiteSparse COMPONENTS umfpack)
+find_and_append_package_to (opm-core Boost 1.39.0
+	COMPONENTS date_time filesystem system unit_test_framework REQUIRED)
+include (UseDynamicBoost)
+
+# use the generic find routine to handle the rest
+include (UseOpmPackage)
+find_opm_package (
+  # module name
+  "opm-core"
+
+  # required dependencies
+  "CXX11Features;BLAS;LAPACK"
+
+  # optional dependencies
+  "dune-istl;SUPERLU"
+
+  # header to search for
+  "opm/core/grid.h"
+
+  # library to search for
+  "opmcore"
+
+  # defines to be added to compilations
+  ""
+
+  # test program
+"#include <opm/core/grid.h>
+int main (void) {
+  struct UnstructuredGrid *g;
+  g = create_grid_empty ();
+  destroy_grid (g);
+  return 0;  
+}
+"
+  # config variables
+  "HAVE_AGMG;
+  HAVE_DUNE_ISTL;
+  HAVE_DYNAMIC_BOOST_TEST;
+  HAVE_ERT;
+  HAVE_SUITESPARSE_UMFPACK_H;
+  HAVE_NULLPTR;
+  HAVE_STATIC_ASSERT
+  ")
+#debug_find_vars ("opm-core")