CMakeLists.txt

cmake_minimum_required(VERSION 3.24)

project(oop)

cmake_policy(SET CMP0135 NEW)

set(CMAKE_CXX_STANDARD 23)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin)

option(WARNINGS_AS_ERRORS "Treat warnings as errors" OFF)

if (CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
    set(CMAKE_INSTALL_PREFIX "install_dir" CACHE PATH "..." FORCE)
endif ()

set(is_debug "$<CONFIG:Debug>")
set(is_rel_with_deb "$<CONFIG:RelWithDebInfo>")
set(debug_mode "$<OR:${is_debug},${is_rel_with_deb}>")

include(cmake/dependencies.cmake)
include(cmake/googleapis.cmake)

add_subdirectory(proto)
add_subdirectory(src)

###############################################################################

function(set_custom_stdlib_and_sanitizers target add_apple_asan)
    if (MSVC)
        # see https://gitlab.kitware.com/cmake/cmake/-/issues/24922
        set_target_properties(${target} PROPERTIES VS_USER_PROPS "${CMAKE_SOURCE_DIR}/disable_modules.props")
        target_compile_options(${target} PRIVATE "$<${debug_mode}:/fsanitize=address>" /experimental:module-)
        return()
    endif ()

    if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
        target_compile_options(${target} PRIVATE -stdlib=libc++)
        target_link_options(${target} PRIVATE -stdlib=libc++)
    endif ()

    if (APPLE)
        # first check Apple since Apple is also a kind of Unix
        if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" AND add_apple_asan MATCHES true)
            target_compile_options(${target} PRIVATE "$<${debug_mode}:-fsanitize=address,undefined>")
            target_link_options(${target} PRIVATE "$<${debug_mode}:-fsanitize=address,undefined>")
        endif ()
    elseif (UNIX)
        if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
            if ("${CMAKE_CXX_COMPILER_VERSION}" MATCHES "12.")
                # check leaks on Linux since macOS does not support the leaks sanitizer yet
                # leaks sanitizer is enabled by default on Linux, so we do not need to enable it explicitly
                target_compile_options(${target} PRIVATE "$<${debug_mode}:-fsanitize=address,undefined>")
                target_link_options(${target} PRIVATE "$<${debug_mode}:-fsanitize=address,undefined>")
            endif ()
        elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
            if ("${CMAKE_CXX_COMPILER_VERSION}" MATCHES "14.")
                # use semi-colons instead of spaces to separate arguments
                # it is recommended to quote generator expressions in order to avoid unintentional splitting
                target_compile_options(${target} PRIVATE "$<${debug_mode}:-fsanitize=memory,undefined;-fsanitize-recover=memory,undefined;-fsanitize-memory-track-origins>")
                target_link_options(${target} PRIVATE "$<${debug_mode}:-fsanitize=memory,undefined;-fsanitize-recover=memory,undefined;-fsanitize-memory-track-origins;-Wl,-rpath,tools/llvm-project/build/lib>")
            else ()
                message("No matching Clang version to add sanitizer flags!")
            endif ()
        endif ()
    endif ()
endfunction()

###############################################################################

# target definitions

if (GITHUB_ACTIONS)
    message("NOTE: GITHUB_ACTIONS defined")
    target_compile_definitions(${PROJECT_NAME} PRIVATE GITHUB_ACTIONS)
endif ()

###############################################################################

if (WARNINGS_AS_ERRORS)
    set_property(TARGET ${PROJECT_NAME} PROPERTY COMPILE_WARNING_AS_ERROR ON)
endif ()

# custom compiler flags
message("Compiler: ${CMAKE_CXX_COMPILER_ID} version ${CMAKE_CXX_COMPILER_VERSION}")
if (MSVC)
    target_compile_options(${PROJECT_NAME} PRIVATE /W4 /permissive- /wd4244 /wd4267 /wd4996 /external:anglebrackets /external:W0)
else ()
    target_compile_options(${PROJECT_NAME} PRIVATE -Wall -Wextra -pedantic)
endif ()

###############################################################################

# sanitizers
set_custom_stdlib_and_sanitizers(${PROJECT_NAME} true)

###############################################################################

###############################################################################

# copy binaries to "bin" folder; these are uploaded as artifacts on each release
# update name in .github/workflows/cmake.yml:29 when changing "bin" name here
install(TARGETS ${PROJECT_NAME} DESTINATION bin)
# install(DIRECTORY some_dir1 some_dir2 DESTINATION bin)
# install(FILES some_file1.txt some_file2.md DESTINATION bin)
if (APPLE)
    install(FILES launcher.command DESTINATION bin)
endif ()