CMakeLists.txt

cmake_minimum_required(VERSION 3.8)

if(DEFINED PROJECT_NAME)
    set(SUBPROJECT ON)
endif()

project(qtpromise VERSION 0.7.0 LANGUAGES CXX)

list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")

find_package(QT 5.6.0 NAMES Qt6 Qt5 REQUIRED)
find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Core)

set(CMAKE_AUTOMOC ON)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

add_library(qtpromise INTERFACE)
add_library(qtpromise::qtpromise ALIAS qtpromise)

target_link_libraries(qtpromise INTERFACE Qt${QT_VERSION_MAJOR}::Core)
target_include_directories(qtpromise INTERFACE "${CMAKE_CURRENT_LIST_DIR}/include")

add_definitions(
    -DQT_DEPRECATED_WARNINGS
    -DQT_NO_KEYWORDS
)

# https://github.com/simonbrunel/qtpromise/issues/10
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
    # https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
    add_compile_options(
        -Werror
        -Wpedantic
        -Wall
        -Wextra
        -Wconversion
        -Wdouble-promotion
        -Wformat=2
        -Wlogical-op
        -Wmissing-noreturn
        -Wold-style-cast
#        -Wshadow                   # disabled due to many findings in the current code
        -Wsign-conversion
        -Wswitch-default
        -Wunused-local-typedefs
        -pedantic-errors
    )

    # https://github.com/Barro/compiler-warnings/blob/master/gcc/warnings-gcc-6.txt
    if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 6)
        add_compile_options(
            -Wduplicated-cond
        )
    endif()

    # https://github.com/Barro/compiler-warnings/blob/master/gcc/warnings-gcc-7.txt
    if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 7)
        add_compile_options(
            -Wduplicated-branches
        )
    endif()
elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
    # https://clang.llvm.org/docs/DiagnosticsReference.html
    add_compile_options(
        -Wall
        -Wextra
        -Wpedantic
        -Wsuggest-destructor-override
        -Wsuggest-override
    )
elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
    # https://docs.microsoft.com/en-us/cpp/build/reference/compiler-option-warning-level
    add_compile_options(
        /WX
    )
endif()

if(NOT SUBPROJECT)
    enable_testing()
    add_subdirectory(tests)
endif()