Add development build option to CMake and enable it on CI

Development build enables warnings and and `Werror` or equivalent.

.travis.yml

@@ -185,9 +185,9 @@ before_script:
     fi
 
     # Use Debug builds for running Valgrind and building examples
-  - cmake -H. -BBuild-Debug -DCMAKE_BUILD_TYPE=Debug -Wdev -DCATCH_USE_VALGRIND=${VALGRIND} -DCATCH_BUILD_EXAMPLES=${EXAMPLES} -DCATCH_ENABLE_COVERAGE=${COVERAGE} -DCATCH_BUILD_EXTRA_TESTS=${EXTRAS} -DCMAKE_CXX_STANDARD=${CPP_STANDARD} -DCMAKE_CXX_STANDARD_REQUIRED=On -DCMAKE_CXX_EXTENSIONS=OFF
+  - cmake -H. -BBuild-Debug -DCMAKE_BUILD_TYPE=Debug -Wdev -DCATCH_USE_VALGRIND=${VALGRIND} -DCATCH_BUILD_EXAMPLES=${EXAMPLES} -DCATCH_ENABLE_COVERAGE=${COVERAGE} -DCATCH_BUILD_EXTRA_TESTS=${EXTRAS} -DCMAKE_CXX_STANDARD=${CPP_STANDARD} -DCMAKE_CXX_STANDARD_REQUIRED=On -DCMAKE_CXX_EXTENSIONS=OFF -DCATCH_DEVELOPMENT_BUILD=ON
     # Don't bother with release build for coverage build
-  - cmake -H. -BBuild-Release -DCMAKE_BUILD_TYPE=Release -Wdev -DCMAKE_CXX_STANDARD=${CPP_STANDARD} -DCMAKE_CXX_STANDARD_REQUIRED=On -DCMAKE_CXX_EXTENSIONS=OFF
+  - cmake -H. -BBuild-Release -DCMAKE_BUILD_TYPE=Release -Wdev -DCMAKE_CXX_STANDARD=${CPP_STANDARD} -DCMAKE_CXX_STANDARD_REQUIRED=On -DCMAKE_CXX_EXTENSIONS=OFF -DCATCH_DEVELOPMENT_BUILD=ON
 
 
 script:

CMake/MiscFunctions.cmake

@@ -24,3 +24,69 @@ function(CheckFileListRec LIST_VAR FOLDER)
     message(AUTHOR_WARNING "The file \"${RELATIVE_FILE_NAME}\"${MESSAGE}")
   endforeach()
 endfunction()
+
+include(CheckCXXCompilerFlag)
+function(add_cxx_flag_if_supported_to_targets flagname targets)
+    check_cxx_compiler_flag("${flagname}" HAVE_FLAG_${flagname})
+
+    if (HAVE_FLAG_${flagname})
+        foreach(target ${targets})
+            target_compile_options(${target} PUBLIC ${flagname})
+        endforeach()
+    endif()
+endfunction()
+
+# Assumes that it is only called for development builds, where warnings
+# and Werror is desired, so it also enables Werror.
+function(add_warnings_to_targets targets)
+    LIST(LENGTH targets TARGETS_LEN)
+    # For now we just assume 2 possibilities: msvc and msvc-like compilers,
+    # and other.
+    if (MSVC)
+        foreach(target ${targets})
+            # Force MSVC to consider everything as encoded in utf-8
+            target_compile_options( ${target} PRIVATE /utf-8 )
+            # Enable Werror equivalent
+            if (CATCH_ENABLE_WERROR)
+                target_compile_options( ${target} PRIVATE /WX )
+            endif()
+
+            # MSVC is currently handled specially
+            if ( CMAKE_CXX_COMPILER_ID MATCHES "MSVC" )
+                STRING(REGEX REPLACE "/W[0-9]" "/W4" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS}) # override default warning level
+                target_compile_options( ${target} PRIVATE /w44265 /w44061 /w44062 /w45038 )
+            endif()
+        endforeach()
+
+    endif()
+
+    if (NOT MSVC)
+        set(CHECKED_WARNING_FLAGS
+          "-Wall"
+          "-Wextra"
+          "-Wpedantic"
+          "-Wweak-vtables"
+          "-Wunreachable-code"
+          "-Wmissing-declarations"
+          "-Wexit-time-destructors"
+          "-Wglobal-constructors"
+          "-Wmissing-noreturn"
+          "-Wparentheses"
+          "-Wextra-semi-stmt"
+          "-Wunreachable-code"
+          "-Wstrict-aliasing"
+          "-Wreturn-std-move"
+          "-Wmissing-braces"
+        )
+        foreach(warning ${CHECKED_WARNING_FLAGS})
+            add_cxx_flag_if_supported_to_targets(${warning} "${targets}")
+        endforeach()
+
+        if (CATCH_ENABLE_WERROR)
+            foreach(target ${targets})
+                # Enable Werror equivalent
+                target_compile_options( ${target} PRIVATE -Werror )
+            endforeach()
+        endif()
+    endif()
+endfunction()

CMakeLists.txt

@@ -6,17 +6,19 @@ if(NOT DEFINED PROJECT_NAME)
   set(NOT_SUBPROJECT ON)
 endif()
 
-option(CATCH_BUILD_TESTING "Build SelfTest project" ON)
-option(CATCH_BUILD_EXAMPLES "Build documentation examples" OFF)
-option(CATCH_BUILD_EXTRA_TESTS "Build extra tests" OFF)
-option(CATCH_ENABLE_COVERAGE "Generate coverage for codecov.io" OFF)
 option(CATCH_INSTALL_DOCS "Install documentation alongside library" ON)
 option(CATCH_INSTALL_EXTRAS "Install extras alongside library" ON)
+option(CATCH_DEVELOPMENT_BUILD "Build tests, enable warnings, enable Werror, etc" ON)
 
+include(CMakeDependentOption)
+cmake_dependent_option(CATCH_BUILD_TESTING "Build the SelfTest project" ON "CATCH_DEVELOPMENT_BUILD" OFF)
+cmake_dependent_option(CATCH_BUILD_EXAMPLES "Build code examples" OFF "CATCH_DEVELOPMENT_BUILD" OFF)
+cmake_dependent_option(CATCH_BUILD_EXTRA_TESTS "Build extra tests" OFF "CATCH_DEVELOPMENT_BUILD" OFF)
+cmake_dependent_option(CATCH_ENABLE_COVERAGE "Generate coverage for codecov.io" OFF "CATCH_DEVELOPMENT_BUILD" OFF)
+cmake_dependent_option(CATCH_ENABLE_WERROR "Enables Werror during build" ON "CATCH_DEVELOPMENT_BUILD" OFF)
 
 set(CATCH_CMAKE_CONFIG_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/Catch2")
 
-
 # Catch2's build breaks if done in-tree. You probably should not build
 # things in tree anyway, but we can allow projects that include Catch2
 # as a subproject to build in-tree as long as it is not in our tree.
@@ -29,7 +31,6 @@ project(Catch2 LANGUAGES CXX VERSION 3.0.0)
 
 # Provide path for scripts
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/CMake")
-
 include(GNUInstallDirs)
 include(CMakePackageConfigHelpers)
 include(CTest)
@@ -61,6 +62,12 @@ if(CATCH_BUILD_EXTRA_TESTS)
     add_subdirectory(tests/ExtraTests)
 endif()
 
+
+if (CATCH_DEVELOPMENT_BUILD)
+    add_warnings_to_targets("${CATCH_WARNING_TARGETS}")
+endif()
+
+
 #option(CATCH_USE_VALGRIND "Perform SelfTests with Valgrind" OFF)
 #option(CATCH_ENABLE_WERROR "Enable all warnings as errors" ON)
 #

examples/CMakeLists.txt

@@ -56,17 +56,8 @@ foreach( name ${ALL_EXAMPLE_TARGETS} )
     target_link_libraries( ${name} Catch2 )
     set_property(TARGET ${name} PROPERTY CXX_STANDARD 14)
     set_property(TARGET ${name} PROPERTY CXX_EXTENSIONS OFF)
-
-    # Add desired warnings
-    if ( CMAKE_CXX_COMPILER_ID MATCHES "Clang|AppleClang|GNU" )
-        target_compile_options( ${name}  PRIVATE -Wall -Wextra -Wunreachable-code )
-    endif()
-    # Clang specific warning go here
-    if ( CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
-        # Actually keep these
-        target_compile_options( ${name}  PRIVATE -Wweak-vtables -Wexit-time-destructors -Wglobal-constructors -Wmissing-noreturn )
-    endif()
-    if ( CMAKE_CXX_COMPILER_ID MATCHES "MSVC" )
-        target_compile_options( ${name}  PRIVATE /W4 /w44265 /WX )
-    endif()
 endforeach()
+
+
+list(APPEND CATCH_WARNING_TARGETS ${ALL_EXAMPLE_TARGETS})
+set(CATCH_WARNING_TARGETS ${CATCH_WARNING_TARGETS} PARENT_SCOPE)

src/CMakeLists.txt

@@ -233,7 +233,6 @@ add_library(Catch2 STATIC
   ${BENCHMARK_HEADERS}
   ${BENCHMARK_SOURCES}
 )
-add_library(Catch2::Catch2 ALIAS Catch2)
 
 if (ANDROID)
     target_link_libraries(Catch2 INTERFACE log)
@@ -278,7 +277,6 @@ add_library(Catch2::Catch2Main ALIAS Catch2Main)
 target_link_libraries(Catch2Main PUBLIC Catch2)
 
 
-
 if (NOT_SUBPROJECT)
     # create and install an export set for catch target as Catch2::Catch
     install(
@@ -320,4 +318,30 @@ if (CATCH_BUILD_EXAMPLES OR CATCH_BUILD_EXTRA_TESTS)
         $<BUILD_INTERFACE:${SOURCES_DIR}/..>
         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
     )
+    target_compile_features(Catch2_buildall_interface
+      INTERFACE
+        cxx_alignas
+        cxx_alignof
+        cxx_attributes
+        cxx_auto_type
+        cxx_constexpr
+        cxx_defaulted_functions
+        cxx_deleted_functions
+        cxx_final
+        cxx_lambdas
+        cxx_noexcept
+        cxx_override
+        cxx_range_for
+        cxx_rvalue_references
+        cxx_static_assert
+        cxx_strong_enums
+        cxx_trailing_return_types
+        cxx_unicode_literals
+        cxx_user_literals
+        cxx_variable_templates
+        cxx_variadic_macros
+    )
 endif()
+
+list(APPEND CATCH_WARNING_TARGETS Catch2 Catch2Main)
+set(CATCH_WARNING_TARGETS ${CATCH_WARNING_TARGETS} PARENT_SCOPE)

tests/CMakeLists.txt

@@ -97,28 +97,6 @@ if (CATCH_ENABLE_COVERAGE)
     coverage_evaluate()
 endif()
 
-# Add per compiler options
-if ( CMAKE_CXX_COMPILER_ID MATCHES "Clang|AppleClang|GNU" )
-    target_compile_options( SelfTest PRIVATE -Wall -Wextra -Wunreachable-code -Wpedantic -Wmissing-declarations )
-    if (CATCH_ENABLE_WERROR)
-        target_compile_options( SelfTest PRIVATE -Werror )
-    endif()
-endif()
-# Clang specific options go here
-if ( CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
-    target_compile_options( SelfTest PRIVATE -Wweak-vtables -Wexit-time-destructors -Wglobal-constructors -Wmissing-noreturn )
-endif()
-if ( CMAKE_CXX_COMPILER_ID MATCHES "MSVC" )
-    STRING(REGEX REPLACE "/W[0-9]" "/W4" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS}) # override default warning level
-    target_compile_options( SelfTest PRIVATE /w44265 /w44061 /w44062 /w45038 )
-    if (CATCH_ENABLE_WERROR)
-        target_compile_options( SelfTest PRIVATE /WX)
-    endif()
-    # Force MSVC to consider everything as encoded in utf-8
-    target_compile_options( SelfTest PRIVATE /utf-8 )
-endif()
-
-
 # configure unit tests via CTest
 add_test(NAME RunTests COMMAND $<TARGET_FILE:SelfTest>)
 set_tests_properties(RunTests PROPERTIES
@@ -241,3 +219,6 @@ if (CATCH_USE_VALGRIND)
     add_test(NAME ValgrindListTags COMMAND valgrind --leak-check=full --error-exitcode=1 $<TARGET_FILE:SelfTest> --list-tags)
     set_tests_properties(ValgrindListTags PROPERTIES PASS_REGULAR_EXPRESSION "definitely lost: 0 bytes in 0 blocks")
 endif()
+
+list(APPEND CATCH_WARNING_TARGETS SelfTest)
+set(CATCH_WARNING_TARGETS ${CATCH_WARNING_TARGETS} PARENT_SCOPE)

tests/ExtraTests/CMakeLists.txt

@@ -128,6 +128,7 @@ if (MSVC)
     set_property( TARGET WindowsHeader PROPERTY CXX_EXTENSIONS OFF )
     target_link_libraries( WindowsHeader Catch2 )
     add_test(NAME WindowsHeader COMMAND WindowsHeader -r compact)
+    list(APPEND CATCH_WARNING_TARGETS ${EXTRA_TEST_BINARIES} WindowsHeader)
 endif()
 
 #add_executable(DebugBreakMacros ${TESTS_DIR}/X12-CustomDebugBreakMacro.cpp)
@@ -155,3 +156,9 @@ foreach( test ${EXTRA_TEST_BINARIES} )
     set_property( TARGET ${test} PROPERTY CXX_STANDARD_REQUIRED ON )
     set_property( TARGET ${test} PROPERTY CXX_EXTENSIONS OFF )
 endforeach()
+
+# Notice that we are modifying EXTRA_TEST_BINARIES destructively, do not
+# use it after this point!
+list(FILTER EXTRA_TEST_BINARIES EXCLUDE REGEX "DisabledExceptions.*")
+list(APPEND CATCH_WARNING_TARGETS ${EXTRA_TEST_BINARIES})
+set(CATCH_WARNING_TARGETS ${CATCH_WARNING_TARGETS} PARENT_SCOPE)

tools/misc/appveyorBuildConfigurationScript.bat

@@ -10,12 +10,12 @@ if "%CONFIGURATION%"=="Debug" (
     @REM # coverage needs to build the special helper as well as the main
     cmake -Htools/misc -Bbuild-misc -A%PLATFORM% || exit /b !ERRORLEVEL!
     cmake --build build-misc || exit /b !ERRORLEVEL!
-    cmake -H. -BBuild -A%PLATFORM% -DUSE_WMAIN=%wmain% -DMEMORYCHECK_COMMAND=build-misc\Debug\CoverageHelper.exe -DMEMORYCHECK_COMMAND_OPTIONS=--sep-- -DMEMORYCHECK_TYPE=Valgrind -DCATCH_BUILD_EXAMPLES=%examples% -DCATCH_BUILD_EXTRA_TESTS=%examples% || exit /b !ERRORLEVEL!
+    cmake -H. -BBuild -A%PLATFORM% -DUSE_WMAIN=%wmain% -DMEMORYCHECK_COMMAND=build-misc\Debug\CoverageHelper.exe -DMEMORYCHECK_COMMAND_OPTIONS=--sep-- -DMEMORYCHECK_TYPE=Valgrind -DCATCH_BUILD_EXAMPLES=%examples% -DCATCH_BUILD_EXTRA_TESTS=%examples% -DCATCH_DEVELOPMENT_BUILD=ON || exit /b !ERRORLEVEL!
   ) else (
     @REM # We know that coverage is 0
-    cmake -H. -BBuild -A%PLATFORM% -DUSE_WMAIN=%wmain% -DCATCH_BUILD_EXAMPLES=%examples% -DCATCH_BUILD_EXTRA_TESTS=%examples% || exit /b !ERRORLEVEL!
+    cmake -H. -BBuild -A%PLATFORM% -DUSE_WMAIN=%wmain% -DCATCH_BUILD_EXAMPLES=%examples% -DCATCH_BUILD_EXTRA_TESTS=%examples% -DCATCH_DEVELOPMENT_BUILD=ON || exit /b !ERRORLEVEL!
   )
 )
 if "%CONFIGURATION%"=="Release" (
-  cmake -H. -BBuild -A%PLATFORM% -DUSE_WMAIN=%wmain% || exit /b !ERRORLEVEL!
+  cmake -H. -BBuild -A%PLATFORM% -DUSE_WMAIN=%wmain% -DCATCH_DEVELOPMENT_BUILD=ON || exit /b !ERRORLEVEL!
 )