ENH: add a find motif

Modules/FindMotif.cmake

@@ -0,0 +1,34 @@
+# Try to find Motif (or lesstif)
+# Once done this will define
+#
+# MOTIF_FOUND        - system has MOTIF
+# MOTIF_INCLUDE_DIR  - where the Motif include directory can be found
+# MOTIF_LIBRARIES    - Link these to use Motif
+
+SET(MOTIF_FOUND 0)
+IF(UNIX)
+  FIND_PATH(MOTIF_INCLUDE_DIR
+    Xm/Xm.h
+    /usr/X11R6/include
+    /usr/local/include
+    /usr/openwin/include
+    /usr/include
+    )
+
+  FIND_LIBRARY(MOTIF_LIBRARIES
+    Xm
+    /usr/X11R6/lib
+    /usr/local/lib
+    /usr/openwin/lib
+    /usr/lib
+    )
+
+  IF(MOTIF_LIBRARIES AND MOTIF_INCLUDE_DIR)
+    SET(MOTIF_FOUND 1)
+  ENDIF(MOTIF_LIBRARIES AND MOTIF_INCLUDE_DIR)
+ENDIF(UNIX)
+
+MARK_AS_ADVANCED(
+  MOTIF_INCLUDE_DIR
+  MOTIF_LIBRARIES
+)