use system KLT library if available

cmake/modules/FindKLT.cmake

@@ -0,0 +1,73 @@
+# - Try to find KLT
+# Once done this will define
+#
+#  KLT_FOUND - system has KLT
+#  KLT_INCLUDE_DIRS - the KLT include directory
+#  KLT_LIBRARIES - Link these to use KLT
+#  KLT_DEFINITIONS - Compiler switches required for using KLT
+#
+#  Copyright (c) 2009 Andreas Schneider <mail@cynapses.org>
+#  updated for KLT by Dan Horák
+#
+#  Redistribution and use is allowed according to the terms of the New
+#  BSD license.
+#  For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+#
+
+
+if (KLT_LIBRARIES AND KLT_INCLUDE_DIRS)
+  # in cache already
+  set(KLT_FOUND TRUE)
+else (KLT_LIBRARIES AND KLT_INCLUDE_DIRS)
+
+  find_path(KLT_INCLUDE_DIR
+    NAMES
+        klt.h
+    PATHS
+        /usr/include
+        /usr/local/include
+        /opt/local/include
+        /sw/include
+        ${CMAKE_INSTALL_PREFIX}/include
+    PATH_SUFFIXES
+        klt
+  )
+  mark_as_advanced(KLT_INCLUDE_DIR)
+
+  find_library(KLT_LIBRARY
+    NAMES
+        klt
+    PATHS
+        /usr/lib64
+        /usr/lib
+        /usr/local/lib
+        /opt/local/lib
+        /sw/lib
+        ${CMAKE_INSTALL_PREFIX}/lib
+  )
+  mark_as_advanced(KLT_LIBRARY)
+
+  set(KLT_INCLUDE_DIRS
+    ${KLT_INCLUDE_DIR}
+  )
+
+  set(KLT_LIBRARIES
+    ${KLT_LIBRARY}
+  )
+
+  if (KLT_INCLUDE_DIRS AND KLT_LIBRARIES)
+     set(KLT_FOUND TRUE)
+  endif (KLT_INCLUDE_DIRS AND KLT_LIBRARIES)
+
+  if (KLT_FOUND)
+    if (NOT KLT_FIND_QUIETLY)
+      message(STATUS "Found KLT: ${KLT_LIBRARIES}")
+    endif (NOT KLT_FIND_QUIETLY)
+  else (KLT_FOUND)
+      message(STATUS "Could not find KLT, using internal code.")
+  endif (KLT_FOUND)
+
+  mark_as_advanced(KLT_INCLUDE_DIRS KLT_LIBRARIES)
+
+endif (KLT_LIBRARIES AND KLT_INCLUDE_DIRS)
+