ENH: Added find support for looking at Cable's build directory if the user sets the CABLE_BUILD_DIR cache entry.

Modules/FindCABLE.cmake

@@ -11,6 +11,38 @@
 #  an include directory.
 #
 
+IF(NOT CABLE)
+  FIND_PATH(CABLE_BUILD_DIR cable.README.txt)
+ENDIF(NOT CABLE)
+
+IF(CABLE_BUILD_DIR)
+  LOAD_CACHE(${CABLE_BUILD_DIR}
+             EXCLUDE
+               BUILD_SHARED_LIBS
+               LIBRARY_OUTPUT_PATH
+               EXECUTABLE_OUTPUT_PATH
+               MAKECOMMAND
+             INCLUDE_INTERNALS
+               CABLE_LIBRARY_OUTPUT_PATH
+               CABLE_EXECUTABLE_OUTPUT_PATH)
+  
+  IF(CABLE_LIBRARY_OUTPUT_PATH)
+    FIND_LIBRARY(CABLE_TCL_LIBRARY NAMES WrapTclFacility PATHS
+                 ${CABLE_LIBRARY_OUTPUT_PATH})
+  ELSE(CABLE_LIBRARY_OUTPUT_PATH)
+    FIND_LIBRARY(CABLE_TCL_LIBRARY NAMES WrapTclFacility PATHS
+                 ${CABLE_BINARY_DIR}/WrapTclFacility)
+  ENDIF(CABLE_LIBRARY_OUTPUT_PATH)
+  
+  IF(CABLE_EXECUTABLE_OUTPUT_PATH)
+    FIND_PROGRAM(CABLE NAMES cable PATHS ${CABLE_EXECUTABLE_OUTPUT_PATH})
+  ELSE(CABLE_EXECUTABLE_OUTPUT_PATH)
+    FIND_PROGRAM(CABLE NAMES cable PATHS ${CABLE_BINARY_DIR}/Executables)
+  ENDIF(CABLE_EXECUTABLE_OUTPUT_PATH)
+   
+  SET(CABLE_INCLUDE_DIR ${CABLE_SOURCE_DIR}
+      CACHE STRING "Include path for Cable headers.")
+ELSE(CABLE_BUILD_DIR)
   # Use some tricks to find the cable executable relative to somewhere
   # in the system search path.  CMake will collapse the relative paths
   # automatically.
@@ -36,3 +68,4 @@ FIND_PATH(CABLE_INCLUDE_DIR WrapTclFacility/wrapCalls.h
   # executable.
   FIND_LIBRARY(CABLE_TCL_LIBRARY NAMES WrapTclFacility PATHS
                ${CABLE_ROOT_BIN}/../lib)  
+ENDIF(CABLE_BUILD_DIR)