Tutorial: Move step 10 to step 4

Shifts steps 4-9 to 5-10.

Help/guide/tutorial/Step6/CMakeLists.txt

@@ -1,11 +1,20 @@
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.15)
 
 # set the project name and version
 project(Tutorial VERSION 1.0)
 
 # specify the C++ standard
-set(CMAKE_CXX_STANDARD 11)
-set(CMAKE_CXX_STANDARD_REQUIRED True)
+add_library(tutorial_compiler_flags INTERFACE)
+target_compile_features(tutorial_compiler_flags INTERFACE cxx_std_11)
+
+# add compiler warning flags just when building this project via
+# the BUILD_INTERFACE genex
+set(gcc_like_cxx "$<COMPILE_LANG_AND_ID:CXX,ARMClang,AppleClang,Clang,GNU,LCC>")
+set(msvc_cxx "$<COMPILE_LANG_AND_ID:CXX,MSVC>")
+target_compile_options(tutorial_compiler_flags INTERFACE
+  "$<${gcc_like_cxx}:$<BUILD_INTERFACE:-Wall;-Wextra;-Wshadow;-Wformat=2;-Wunused>>"
+  "$<${msvc_cxx}:$<BUILD_INTERFACE:-W3>>"
+)
 
 # should we use our own math functions
 option(USE_MYMATH "Use tutorial provided math implementation" ON)
@@ -22,7 +31,7 @@ endif()
 
 # add the executable
 add_executable(Tutorial tutorial.cxx)
-target_link_libraries(Tutorial PUBLIC ${EXTRA_LIBS})
+target_link_libraries(Tutorial PUBLIC ${EXTRA_LIBS} tutorial_compiler_flags)
 
 # add the binary tree to the search path for include files
 # so that we will find TutorialConfig.h
@@ -37,7 +46,7 @@ install(FILES "${PROJECT_BINARY_DIR}/TutorialConfig.h"
   )
 
 # enable testing
-include(CTest)
+enable_testing()
 
 # does the application run
 add_test(NAME Runs COMMAND Tutorial 25)

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

@@ -6,6 +6,9 @@ target_include_directories(MathFunctions
           INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}
           )
 
+target_link_libraries(MathFunctions tutorial_compiler_flags)
+
 # install rules
-install(TARGETS MathFunctions DESTINATION lib)
+set(installable_libs MathFunctions tutorial_compiler_flags)
+install(TARGETS ${installable_libs} DESTINATION lib)
 install(FILES MathFunctions.h DESTINATION include)