adding findGMP.cmake

cmake/FindGMP.cmake

@@ -0,0 +1,23 @@
+# Try to find the GMP librairies
+#  GMP_FOUND - system has GMP lib
+#  GMP_INCLUDE_DIR - the GMP include directory
+#  GMP_LIBRARIES - Libraries needed to use GMP
+
+# Copyright (c) 2006, Laurent Montel, <montel@kde.org>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+
+if (GMP_INCLUDE_DIR AND GMP_LIBRARIES)
+  # Already in cache, be silent
+  set(GMP_FIND_QUIETLY TRUE)
+endif (GMP_INCLUDE_DIR AND GMP_LIBRARIES)
+
+find_path(GMP_INCLUDE_DIR NAMES gmp.h )
+find_library(GMP_LIBRARIES NAMES gmp libgmp)
+
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(GMP DEFAULT_MSG GMP_INCLUDE_DIR GMP_LIBRARIES)
+
+mark_as_advanced(GMP_INCLUDE_DIR GMP_LIBRARIES)