ENH: Create include(CTest) launcher interface

This defines a new CTest configuration variable CTEST_USE_LAUNCHERS.
When set to true it puts 'ctest --launch' in RULE_LAUNCH_* properties
and enables the CTest configuration option 'UseLaunchers'.  Currently
this works only for Makefile generators.

Modules/CTest.cmake

@@ -190,6 +190,18 @@ IF(BUILD_TESTING)
   # set the build command
   BUILD_COMMAND(MAKECOMMAND ${MAKEPROGRAM} )
 
+  IF(NOT "${CMAKE_GENERATOR}" MATCHES "Make")
+    SET(CTEST_USE_LAUNCHERS 0)
+  ENDIF(NOT "${CMAKE_GENERATOR}" MATCHES "Make")
+  IF(CTEST_USE_LAUNCHERS)
+    SET(CTEST_LAUNCH_COMPILE "\"${CMAKE_CTEST_COMMAND}\" --launch --target-name <TARGET_NAME> --build-dir <CMAKE_CURRENT_BINARY_DIR> --output <OBJECT> --source <SOURCE> --language <LANGUAGE> --")
+    SET(CTEST_LAUNCH_LINK    "\"${CMAKE_CTEST_COMMAND}\" --launch --target-name <TARGET_NAME> --build-dir <CMAKE_CURRENT_BINARY_DIR> --output <TARGET> --target-type <TARGET_TYPE> --language <LANGUAGE> --")
+    SET(CTEST_LAUNCH_CUSTOM  "\"${CMAKE_CTEST_COMMAND}\" --launch --target-name <TARGET_NAME> --build-dir <CMAKE_CURRENT_BINARY_DIR> --output <OUTPUT> --")
+    SET_PROPERTY(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CTEST_LAUNCH_COMPILE}")
+    SET_PROPERTY(GLOBAL PROPERTY RULE_LAUNCH_LINK "${CTEST_LAUNCH_LINK}")
+    SET_PROPERTY(GLOBAL PROPERTY RULE_LAUNCH_CUSTOM "${CTEST_LAUNCH_CUSTOM}")
+  ENDIF(CTEST_USE_LAUNCHERS)
+
   MARK_AS_ADVANCED(
     COVERAGE_COMMAND
     CVSCOMMAND

Modules/DartConfiguration.tcl.in

@@ -60,3 +60,5 @@ CoverageCommand: @COVERAGE_COMMAND@
 # process will be summaily terminated.
 # Currently set to 25 minutes
 TimeOut: @DART_TESTING_TIMEOUT@
+
+UseLaunchers: @CTEST_USE_LAUNCHERS@