Fix CompileCommandOutput test for Make tools not supporting spaces

Use underscores instead of spaces for such Make tools.

Tests/CMakeLists.txt

@@ -11,6 +11,7 @@ MACRO(ADD_TEST_MACRO NAME COMMAND)
     --build-generator ${CMAKE_TEST_GENERATOR}
     --build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
     --build-project ${proj}
+    ${${NAME}_EXTRA_OPTIONS}
     --test-command ${COMMAND} ${ARGN})
   LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/${dir}")
 ENDMACRO(ADD_TEST_MACRO)
@@ -2037,6 +2038,8 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=master -P ${CMake_SOURCE_DIR}/Utilities/
   ENDFOREACH()
 
   IF(TEST_CompileCommandOutput)
+    SET(CompileCommandOutput_EXTRA_OPTIONS
+      --build-options -DMAKE_SUPPORTS_SPACES=${MAKE_IS_GNU})
     ADD_TEST_MACRO(CompileCommandOutput
       "${CMake_BINARY_DIR}/Tests/CMakeLib/runcompilecommands")
   ENDIF()

Tests/CompileCommandOutput/CMakeLists.txt

@@ -4,7 +4,12 @@ project (CompileCommandOutput CXX)
 
 SET(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 set(CMAKE_DEBUG_POSTFIX "_test_debug_postfix")
-ADD_LIBRARY(test1 STATIC "file with spaces.cxx")
+IF(MAKE_SUPPORTS_SPACES)
+  SET(test1_srcs "file with spaces.cxx")
+ELSE()
+  SET(test1_srcs "file_with_underscores.cxx")
+ENDIF()
+ADD_LIBRARY(test1 STATIC ${test1_srcs})
 ADD_LIBRARY(test2 SHARED "../CompileCommandOutput/relative.cxx")
 INCLUDE_DIRECTORIES(${CompileCommandOutput_SOURCE_DIR}/../../Source)
 ADD_EXECUTABLE(CompileCommandOutput compile_command_output.cxx)

Tests/CompileCommandOutput/compile_command_output.cxx

-#include "file with spaces.h"
+#include "file_with_underscores.h"
 #include "relative.h"
 
 int main (int argc, char** argv)
 {
-  file_with_spaces();
+  file_with_underscores();
   relative();
   return 0;
 }

Tests/CompileCommandOutput/file with spaces.cxx

-#include "file with spaces.h"
-
-void file_with_spaces() {}
+#include "file_with_underscores.cxx"

Tests/CompileCommandOutput/file with spaces.h

-void file_with_spaces();

Tests/CompileCommandOutput/file_with_underscores.cxx

+#include "file_with_underscores.h"
+
+void file_with_underscores() {}

Tests/CompileCommandOutput/file_with_underscores.h

+void file_with_underscores();