ENH: Add test_clean target to wipe out tests

We frequently need to wipe out all the CMake test build directories in
order to run tests from scratch.  This change adds a test_clean custom
target to remove all these directories for out-of-source builds.

Tests/CMakeLists.txt

@@ -10,10 +10,14 @@ MACRO(ADD_TEST_MACRO NAME COMMAND)
     --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
     --build-project ${NAME}
     --test-command ${COMMAND})
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/${NAME}")
 ENDMACRO(ADD_TEST_MACRO)
 
 # Testing
 IF(BUILD_TESTING)
+  # Collect a list of all test build directories.
+  SET(TEST_BUILD_DIRS)
+
   # Should the long tests be run?
   OPTION(CMAKE_RUN_LONG_TESTS 
     "Should the long tests be run (such as Bootstrap)." ON)
@@ -110,6 +114,7 @@ IF(BUILD_TESTING)
          --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
          --build-project Simple
          --test-command Simple)
+      LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Simple_EclipseGenerator")
     ENDIF ("${cmakeOutput}" MATCHES Eclipse)
 
     # check for the CodeBlocks generator
@@ -123,6 +128,7 @@ IF(BUILD_TESTING)
          --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
          --build-project Simple
          --test-command Simple)
+      LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Simple_CodeBlocksGenerator")
     ENDIF ("${cmakeOutput}" MATCHES CodeBlocks)
 
     # check for the KDevelop3 generator
@@ -136,6 +142,7 @@ IF(BUILD_TESTING)
          --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
          --build-project Simple
          --test-command Simple)
+      LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Simple_KDevelop3Generator")
     ENDIF ("${cmakeOutput}" MATCHES KDevelop3)
 
   ENDIF(${CMAKE_TEST_GENERATOR} MATCHES "Unix Makefiles"  OR  ${CMAKE_TEST_GENERATOR} MATCHES "KDevelop")
@@ -172,6 +179,7 @@ IF(BUILD_TESTING)
       --test-command foo
       )
     SET_TESTS_PROPERTIES ( SubProject-Stage2 PROPERTIES DEPENDS SubProject)
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/SubProject")
   ENDIF(NOT MSVC60 AND NOT XCODE AND NOT MSVC70)
 
   IF (CMAKE_STRICT)
@@ -203,6 +211,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-options
     "-DCMAKE_INSTALL_PREFIX:PATH=${CMake_BINARY_DIR}/Tests/Framework/Install"
     --test-command bar)
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Framework")
 
   ADD_TEST(TargetName ${CMAKE_CTEST_COMMAND}
     --build-and-test
@@ -215,6 +224,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --test-command ${CMAKE_CMAKE_COMMAND} -E compare_files 
     ${CMake_SOURCE_DIR}/Tests/TargetName/scripts/hello_world
     ${CMake_BINARY_DIR}/Tests/TargetName/scripts/hello_world)
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/TargetName")
 
   ADD_TEST(LibName ${CMAKE_CTEST_COMMAND}
     --build-and-test
@@ -227,6 +237,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-exe-dir "${CMake_BINARY_DIR}/Tests/LibName/lib"
     --test-command foobar
     )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/LibName")
 
   ADD_TEST(CustComDepend ${CMAKE_CTEST_COMMAND}
     --build-and-test
@@ -239,6 +250,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-exe-dir "${CMake_BINARY_DIR}/Tests/CustComDepend/bin"
     --test-command foo bar.c
     )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/CustComDepend")
 
   ADD_TEST(CustomCommand  ${CMAKE_CTEST_COMMAND}
     --build-and-test
@@ -251,6 +263,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-exe-dir "${CMake_BINARY_DIR}/Tests/CustomCommand/bin"
     --test-command CustomCommand
     )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/CustomCommand")
 
   ADD_TEST(CustomCommandWorkingDirectory  ${CMAKE_CTEST_COMMAND}
     --build-and-test
@@ -262,6 +275,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
     --test-command working
     )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/CustomCommandWorkingDirectory")
 
    #ADD_TEST(SimpleExclude ${CMAKE_CTEST_COMMAND}
    #  --build-and-test
@@ -298,6 +312,9 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-two-config
     --test-command
     "${CMake_BINARY_DIR}/Tests/OutOfSource/SubDir/OutOfSourceSubdir/simple")
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/OutOfSource")
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/OutOfSourceDeep")
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/OutOfBinary")
 
   ADD_TEST(BuildDepends ${CMAKE_CTEST_COMMAND}
     --build-and-test
@@ -307,6 +324,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-project BuildDepends
     --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
     )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/BuildDepends")
   
   SET(SimpleInstallInstallDir
     "${CMake_BINARY_DIR}/Tests/SimpleInstall/InstallDirectory")
@@ -321,6 +339,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-options
     "-DCMAKE_INSTALL_PREFIX:PATH=${SimpleInstallInstallDir}"
     --test-command   ${SimpleInstallInstallDir}/MyTest/bin/SimpleInstExe)
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/SimpleInstall")
   ADD_TEST(SimpleInstall-Stage2 ${CMAKE_CTEST_COMMAND}
     --build-and-test
     "${CMake_SOURCE_DIR}/Tests/SimpleInstallS2"
@@ -333,6 +352,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     "-DCMAKE_INSTALL_PREFIX:PATH=${SimpleInstallInstallDir}"
     "-DSTAGE2:BOOL=1"
     --test-command   ${SimpleInstallInstallDir}/MyTest/bin/SimpleInstExeS2)
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/SimpleInstallS2")
 
   # By default, run the CPackComponents test if the CTEST_TEST_CPACK
   # option is ON:
@@ -367,6 +387,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       --test-command ${CMAKE_CMAKE_COMMAND}
         "-DCPackComponents_BINARY_DIR:PATH=${CMake_BINARY_DIR}/Tests/CPackComponents"
         -P "${CMake_SOURCE_DIR}/Tests/CPackComponents/VerifyResult.cmake")
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/CPackComponents")
   ENDIF(CTEST_RUN_CPackComponents)
 
   ADD_TEST(X11  ${CMAKE_CTEST_COMMAND}
@@ -378,6 +399,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
     --build-two-config
     --test-command  UseX11)
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/X11")
 
   ADD_TEST(LoadedCommandOneConfig  ${CMAKE_CTEST_COMMAND}
     --build-and-test
@@ -388,6 +410,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
     --test-command  LoadedCommand
     )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/LoadCommandOneConfig")
 
   # Como does not seem to support shared libraries.
   GET_FILENAME_COMPONENT(CMAKE_BASE_NAME ${CMAKE_CXX_COMPILER} NAME_WE)
@@ -410,6 +433,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       -DCMAKE_TEST_SYSTEM_LIBRARIES:BOOL=${CMAKE_TEST_SYSTEM_LIBRARIES}
       --test-command complex
       )
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Complex")
 
     ADD_TEST(complexOneConfig  ${CMAKE_CTEST_COMMAND}
       --build-and-test
@@ -423,6 +447,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       -DCMAKE_TEST_DIFFERENT_GENERATOR:BOOL=${CMAKE_TEST_DIFFERENT_GENERATOR}
       -DCMAKE_TEST_SYSTEM_LIBRARIES:BOOL=${CMAKE_TEST_SYSTEM_LIBRARIES}
       --test-command complex)
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/ComplexOneConfig")
 
 # This fails on VS 70
 # works on Xcode and makefiles
@@ -460,6 +485,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-exe-dir "${CMake_BINARY_DIR}/Example/Demo"
     --test-command helloDemo
     )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Example")
 
   # do each of the tutorial steps
   FOREACH(STP RANGE 1 7)
@@ -473,6 +499,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       --build-project Tutorial
       --test-command Tutorial 25.0)
   ENDFOREACH(STP)
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Tutorial")
 
   ADD_TEST(testing ${CMAKE_CTEST_COMMAND}
     --build-and-test
@@ -484,6 +511,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-exe-dir "${CMake_BINARY_DIR}/Tests/Testing/bin"
     --test-command testing
     )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Testing")
 
   ADD_TEST(wrapping  ${CMAKE_CTEST_COMMAND}
     --build-and-test
@@ -505,6 +533,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-exe-dir "${CMake_BINARY_DIR}/Tests/Wrapping/bin"
       --test-command qtwrapping
       )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Wrapping")
 
   ADD_TEST(testdriver1 ${CMAKE_CTEST_COMMAND}
     --build-and-test
@@ -538,6 +567,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-project TestDriverTest
     --test-command TestDriverTest subdir/test3
     )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/TestDriver")
 
   ADD_TEST(Dependency ${CMAKE_CTEST_COMMAND}
     --build-and-test
@@ -549,6 +579,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-project Dependency
     --test-command exec
     )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Dependency")
 
   IF("${CMAKE_SYSTEM_NAME}" MATCHES syllable)
 
@@ -592,6 +623,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
       --test-command jumpExecutable
       )
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Jump")
 
     ADD_TEST(Plugin ${CMAKE_CTEST_COMMAND}
       --build-and-test
@@ -602,6 +634,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
       --build-two-config
       --test-command bin/example)
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Plugin")
 
     IF(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG)
       ADD_TEST_MACRO(RuntimePath RuntimePath)
@@ -627,6 +660,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     --build-project LinkLineOrder
     --test-command Exec2
     )
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/LinkLineOrder")
   SET_TESTS_PROPERTIES ( qtwrapping PROPERTIES DEPENDS wrapping)
   SET_TESTS_PROPERTIES ( testdriver1 PROPERTIES DEPENDS qtwrapping)
   SET_TESTS_PROPERTIES ( testdriver2 PROPERTIES DEPENDS testdriver1)
@@ -644,6 +678,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       --build-project kwsys
       --test-command kwsysTestsCxx testIOS
       )
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/kwsys")
   ENDIF(NOT CMAKE_TEST_DIFFERENT_GENERATOR)
   SET(MAKE_IS_GNU )
   IF(${CMAKE_TEST_MAKEPROGRAM} MATCHES make)
@@ -676,6 +711,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       "${CMake_BINARY_DIR}/Tests/SubDirSpaces/ShouldBeHere"
       "${CMake_BINARY_DIR}/Tests/SubDirSpaces/testfromsubdir.obj"
       )
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/SubDirSpaces")
   ENDIF (MAKE_IS_GNU OR
     "${CMAKE_TEST_MAKEPROGRAM}" MATCHES "nmake|gmake|wmake" OR
     "${CMAKE_TEST_GENERATOR}" MATCHES "Visual Studio|XCode|Borland")
@@ -707,6 +743,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       "${CMake_BINARY_DIR}/Tests/SubDir/testfromsubdir.o"
       )
   ENDIF (WIN32)
+  LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/SubDir")
 
   IF(CMAKE_TEST_MSVC)
     ADD_TEST_MACRO(PrecompiledHeader foo)
@@ -723,6 +760,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       --build-exe-dir "${CMake_BINARY_DIR}/MakeClean"
       --test-command check_clean
       )
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/MakeClean")
   ENDIF("${CMAKE_TEST_GENERATOR}" MATCHES "Makefile")
 
   IF(${CMAKE_TEST_GENERATOR} MATCHES "Visual Studio")
@@ -735,6 +773,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       --build-project VSExternalInclude
       --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
       --test-command VSExternalInclude)
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/VSExternalInclude")
   ENDIF(${CMAKE_TEST_GENERATOR} MATCHES "Visual Studio")
 
   IF (APPLE AND CMAKE_COMPILER_IS_GNUCXX)
@@ -754,6 +793,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
        "-DCMake_SOURCE_DIR:PATH=${CMAKE_SOURCE_DIR}"
       --test-command
       ${BundleTestInstallDir}/Applications/SecondBundleExe.app/Contents/MacOS/SecondBundleExe)
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/BundleTest")
 
     ADD_TEST_MACRO(ObjC++ ObjC++)
   ENDIF (APPLE AND CMAKE_COMPILER_IS_GNUCXX)
@@ -770,6 +810,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       --build-target package
       --build-options "-DCMAKE_INSTALL_PREFIX:PATH=${CMake_BINARY_DIR}/Tests/BundleGeneratorTest/InstallDirectory"
       )
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/BundleGeneratorTest")
   ENDIF(APPLE AND CTEST_TEST_CPACK)
 
   IF (CTEST_TEST_CTEST AND CMAKE_RUN_LONG_TESTS)
@@ -832,6 +873,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       --build-generator "${CMAKE_TEST_GENERATOR}"
       --test-command 
       ${CMake_BINARY_DIR}/Tests/BootstrapTest/Bootstrap.cmk/cmake)
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/BootstrapTest")
 
     # provide more time for the bootstrap test
     GET_TEST_PROPERTY(BootstrapTest TIMEOUT PREVIOUS_TIMEOUT)
@@ -863,6 +905,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
         --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
         --build-two-config
         --test-command testf)
+      LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Fortran")
     ENDIF(CMAKE_Fortran_COMPILER_FULLPATH)
   ENDIF(CMAKE_TEST_GENERATOR MATCHES "Makefiles"
      OR CMAKE_TEST_GENERATOR MATCHES "KDevelop")
@@ -887,6 +930,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
             --build-two-config
             --build-run-dir "${CMake_BINARY_DIR}/Tests/Java/"
             --test-command ${JAVA_RUNTIME} -classpath hello.jar HelloWorld)
+          LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Java")
         ENDIF("${JNI_FILE}" MATCHES "JDK1_2")
       ENDIF(JNI_H)
     ENDIF(JAVA_COMPILE AND JAVA_RUNTIME AND JAVA_ARCHIVE AND NOT MINGW)
@@ -909,6 +953,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
         --build-options
         "-DCMAKE_SYSTEM_NAME=Generic"
         "-DCMAKE_C_COMPILER=${SDCC_EXECUTABLE}")
+      LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/SimpleCOnly_sdcc")
     ENDIF(SDCC_EXECUTABLE)
     
     
@@ -927,6 +972,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
         "-DCMAKE_SYSTEM_NAME=Windows"
         "-DCMAKE_C_COMPILER=${MINGW_CC_LINUX2WIN_EXECUTABLE}"
         "-DCMAKE_CXX_COMPILER=${MINGW_CXX_LINUX2WIN_EXECUTABLE}")
+      LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/Simple_Mingw_Linux2Win")
     ENDIF(MINGW_CC_LINUX2WIN_EXECUTABLE  AND  MINGW_CXX_LINUX2WIN_EXECUTABLE)
     
     
@@ -945,6 +991,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
       --build-options -DwxWidgets_CONFIG_EXECUTABLE=${wxWidgets_CONFIG_EXECUTABLE}
       --test-command UseWX
       )
+    LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/UseWX")
   ENDIF(BUILD_WXDialog AND wxWidgets_CONFIG_EXECUTABLE)
 
   IF(UNIX)
@@ -975,6 +1022,17 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     SET_TESTS_PROPERTIES ( KDELibsAlpha1 PROPERTIES TIMEOUT 5400)
   ENDIF(CMAKE_TEST_KDELIBS_ALPHA_1_DIR)
 
+  # If this is not an in-source build, provide a target to wipe out
+  # all the test build directories.
+  IF(NOT EXISTS "${CMAKE_BINARY_DIR}/CMakeLists.txt")
+    CONFIGURE_FILE(${CMake_SOURCE_DIR}/Tests/test_clean.cmake.in
+                   ${CMake_BINARY_DIR}/Tests/test_clean.cmake @ONLY)
+    ADD_CUSTOM_TARGET(test_clean
+      COMMAND ${CMAKE_COMMAND} -P ${CMake_BINARY_DIR}/Tests/test_clean.cmake
+      COMMENT "Removing test build directories."
+      )
+  ENDIF(NOT EXISTS "${CMAKE_BINARY_DIR}/CMakeLists.txt")
+
 ENDIF(BUILD_TESTING)
 
 SUBDIRS(CMakeTests)

Tests/test_clean.cmake.in

@@ -0,0 +1,2 @@
+SET(TEST_BUILD_DIRS "@TEST_BUILD_DIRS@")
+FILE(REMOVE_RECURSE ${TEST_BUILD_DIRS})