ENH: Adding test of "make clean".

Tests/MakeClean/CMakeLists.txt

@@ -0,0 +1,57 @@
+PROJECT(MakeClean)
+
+# Build the to-clean project.
+TRY_COMPILE(TOCLEAN_BUILT
+  ${MakeClean_BINARY_DIR}/ToClean
+  ${MakeClean_SOURCE_DIR}/ToClean
+  ToClean
+  toclean
+  OUTPUT_VARIABLE OUTPUT
+  )
+IF(TOCLEAN_BUILT)
+  MESSAGE(
+    "Building ToClean succeeded with the following output:\n"
+    "[${OUTPUT}]"
+    )
+ELSE(TOCLEAN_BUILT)
+  MESSAGE(FATAL_ERROR
+    "Building ToClean failed with the following output:\n"
+    "[${OUTPUT}]"
+    )
+ENDIF(TOCLEAN_BUILT)
+
+# Get the set of files to check from the ToClean project.
+INCLUDE(${MakeClean_BINARY_DIR}/ToClean/ToCleanFiles.cmake)
+
+# Check for the existence of the files.
+FOREACH(f ${TOCLEAN_FILES})
+  IF(EXISTS "${f}")
+  ELSE(EXISTS "${f}")
+    MESSAGE(FATAL_ERROR "File \"${f}\" does not exist!")
+  ENDIF(EXISTS "${f}")
+ENDFOREACH(f)
+
+# Configure an executable to check that all the files are missing.
+SET(CHECK_FILES)
+FOREACH(f ${TOCLEAN_FILES})
+  SET(CHECK_FILES "${CHECK_FILES}      \"${f}\",\n")
+ENDFOREACH(f)
+CONFIGURE_FILE(${MakeClean_SOURCE_DIR}/check_clean.c.in
+               ${MakeClean_BINARY_DIR}/check_clean.c @ONLY IMMEDIATE)
+ADD_EXECUTABLE(check_clean ${MakeClean_BINARY_DIR}/check_clean.c)
+
+# After the executable builds, clean the files.
+ADD_CUSTOM_COMMAND(
+  TARGET check_clean
+  POST_BUILD
+  COMMAND ${CMAKE_CTEST_COMMAND}
+  ARGS --build-and-test
+       ${MakeClean_SOURCE_DIR}/ToClean
+       ${MakeClean_BINARY_DIR}/ToClean
+       --build-generator ${CMAKE_GENERATOR}
+       --build-project ToClean
+       --build-makeprogram ${CMAKE_MAKE_PROGRAM}
+       --build-noclean
+       --build-target clean
+  COMMENT "Clean the ToClean Project"
+  )

Tests/MakeClean/ToClean/CMakeLists.txt

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+PROJECT(ToClean)
+
+# Build a simple project.
+ADD_EXECUTABLE(toclean toclean.cxx)
+
+# List some build-time-generated files.
+GET_TARGET_PROPERTY(TOCLEAN_FILES toclean LOCATION)
+SET(TOCLEAN_FILES ${TOCLEAN_FILES}
+  "${ToClean_BINARY_DIR}/toclean${CMAKE_CXX_OUTPUT_EXTENSION}")
+#SET(TOCLEAN_FILES ${TOCLEAN_FILES}
+#  "${ToClean_BINARY_DIR}/toclean.dir/toclean${CMAKE_CXX_OUTPUT_EXTENSION}")
+
+# Create a file that must be registered for cleaning.
+FILE(WRITE "${ToClean_BINARY_DIR}/Registered.txt"
+  "File registered for cleaning.\n")
+SET_DIRECTORY_PROPERTIES(PROPERTIES
+  ADDITIONAL_MAKE_CLEAN_FILES "${ToClean_BINARY_DIR}/Registered.txt")
+SET(TOCLEAN_FILES ${TOCLEAN_FILES} "${ToClean_BINARY_DIR}/Registered.txt")
+
+# Configure a file listing these build-time-generated files.
+CONFIGURE_FILE(${ToClean_SOURCE_DIR}/ToCleanFiles.cmake.in
+               ${ToClean_BINARY_DIR}/ToCleanFiles.cmake @ONLY IMMEDIATE)

Tests/MakeClean/ToClean/ToCleanFiles.cmake.in

@@ -0,0 +1 @@
+SET(TOCLEAN_FILES "@TOCLEAN_FILES@")

Tests/MakeClean/ToClean/toclean.cxx

@@ -0,0 +1,4 @@
+int main()
+{
+  return 0;
+}

Tests/MakeClean/check_clean.c.in

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+#include <stdio.h>
+
+int main()
+{
+  /* The list of files to check.  */
+  const char* files[] =
+    {
+      @CHECK_FILES@
+      0
+    };
+
+  /* No file should exist.  */
+  const char** f = files;
+  int result = 0;
+  for(; *f; ++f)
+    {
+    FILE* pf = fopen(*f, "rb");
+    if(pf)
+      {
+      fclose(pf);
+      fprintf(stderr, "File \"%s\" exists!", *f);
+      result = 1;
+      }
+    }
+  return result;
+}