Tutorial: Update Step 5 to work on Windows

`log` and `exp` should be found on Windows systems now, as expected.

Update tests to be more specific in looking for the expected outcome of
the tutorial.

Help/guide/tutorial/Step6/MathFunctions/CMakeLists.txt

@@ -8,10 +8,20 @@ target_include_directories(MathFunctions
 
 # does this system provide the log and exp functions?
 include(CheckSymbolExists)
-set(CMAKE_REQUIRED_LIBRARIES "m")
 check_symbol_exists(log "math.h" HAVE_LOG)
 check_symbol_exists(exp "math.h" HAVE_EXP)
+if(NOT (HAVE_LOG AND HAVE_EXP))
+  unset(HAVE_LOG CACHE)
+  unset(HAVE_EXP CACHE)
+  set(CMAKE_REQUIRED_LIBRARIES "m")
+  check_symbol_exists(log "math.h" HAVE_LOG)
+  check_symbol_exists(exp "math.h" HAVE_EXP)
+  if(HAVE_LOG AND HAVE_EXP)
+    target_link_libraries(MathFunctions PRIVATE m)
+  endif()
+endif()
 
+# add compile definitions
 if(HAVE_LOG AND HAVE_EXP)
   target_compile_definitions(MathFunctions
                              PRIVATE "HAVE_LOG" "HAVE_EXP")

Help/guide/tutorial/index.rst

@@ -386,7 +386,7 @@ these functions using the :module:`CheckSymbolExists` module in the top-level
 .. literalinclude:: Step6/MathFunctions/CMakeLists.txt
   :language: cmake
   :start-after: # does this system provide the log and exp functions?
-  :end-before: if(HAVE_LOG AND HAVE_EXP)
+  :end-before: # add compile definitions
 
 Now let's add these defines to ``TutorialConfig.h.in`` so that we can use them
 from ``mysqrt.cxx``:

Tests/CMakeLists.txt

@@ -1605,7 +1605,7 @@ ${CMake_SOURCE_DIR}/Utilities/Release/push.bash --dir dev -- '${CMake_BUILD_NIGH
     DEPENDS ExternalProjectUpdateSetup )
 
   # do each of the tutorial steps
-  function(add_tutorial_test step_name use_mymath)
+  function(add_tutorial_test step_name use_mymath tutorial_arg pass_regex)
     set(tutorial_test_name Tutorial${step_name})
     set(tutorial_build_dir "${CMake_BINARY_DIR}/Tests/Tutorial/${step_name}")
     if (use_mymath)
@@ -1623,19 +1623,28 @@ ${CMake_SOURCE_DIR}/Utilities/Release/push.bash --dir dev -- '${CMake_BUILD_NIGH
       ${build_generator_args}
       --build-project Tutorial
       --build-options ${tutorial_build_options}
-      --test-command Tutorial 25.0)
+      --test-command Tutorial ${tutorial_arg})
+    set_tests_properties(${tutorial_test_name} PROPERTIES
+      PASS_REGULAR_EXPRESSION ${pass_regex})
+
     list(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/${tutorial_build_dir}_Build")
   endfunction()
 
   if(NOT CMake_TEST_EXTERNAL_CMAKE)
     foreach(STP RANGE 2 12)
-      add_tutorial_test(Step${STP} TRUE)
+      if (STP EQUAL 6)
+        set(pass_regex ".*using log and exp")
+      else()
+        set(pass_regex "The square root of 25 is 5")
+      endif()
+      add_tutorial_test(Step${STP} TRUE 25 ${pass_regex})
     endforeach()
-    add_tutorial_test(Complete TRUE)
+    set(pass_regex "The square root of 25 is 5")
+    add_tutorial_test(Complete TRUE 25 ${pass_regex})
     foreach(STP RANGE 3 12)
-      add_tutorial_test(Step${STP} FALSE)
+      add_tutorial_test(Step${STP} FALSE 25 ${pass_regex})
     endforeach()
-    add_tutorial_test(Complete FALSE)
+    add_tutorial_test(Complete FALSE 25 ${pass_regex})
   endif()
 
   add_test(testing ${CMAKE_CTEST_COMMAND} -C \${CTEST_CONFIGURATION_TYPE}