a default cmakelists for... anything (nearly)

CMakeLists.txt

cmake_minimum_required(VERSION 3.8)  # using the latest version atm

project(project_name)
set(LIB_NAME lib_${PROJECT_NAME})

if (CMAKE_BUILD_TYPE MATCHES Debug)
    if (CMAKE_COMPILER_IS_GNUCXX)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pg -g -no-pie")
    elseif (MSVC)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MTd")
    endif()
elseif (CMAKE_BUILD_TYPE MATCHES Release)
    if (CMAKE_COMPILER_IS_GNUCXX)
        set(CMAKE_CXX_FLAGS "-DNDEBUG -O4 -s")
    elseif (MSVC)
        set(CMAKE_CXX_FLAGS "/Ox /Ob2 /Oi /Ot /Oy /MT")
    endif()
endif()

if (CMAKE_COMPILER_IS_GNUCXX)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,-rpath,/usr/local/lib")
endif()

configure_file(
    ${PROJECT_SOURCE_DIR}/include/${PROJECT_NAME}/Constants.hpp.in
    ${PROJECT_SOURCE_DIR}/include/${PROJECT_NAME}/Constants.hpp
)

# everything that will be used like this : #include <lib/file.hpp>
# ext/
#     lib/
#         file.hpp
include_directories(
    ${PROJECT_SOURCE_DIR}/ext  # ext libs
    ${PROJECT_SOURCE_DIR}/include  # includes for the project
)

# fetching all .cpp
file(GLOB_RECURSE SOURCE_FILES
    ${PROJECT_SOURCE_DIR}/src/*.cpp
  
    # add this if there are .c/.cpp to compile in the ext folder
    ${PROJECT_SOURCE_DIR}/ext/*.cpp
    ${PROJECT_SOURCE_DIR}/ext/*.c
)
list(REMOVE_ITEM SOURCE_FILES "${PROJECT_SOURCE_DIR}/src/main.cpp")

# the libs we need (example is for an opengl project)
set(ALL_LIBS glfw GL GLU X11 pthread Xrandr Xi dl)
set(LINUX_LIBS ${CMAKE_DL_LIBS})
set(WINDOWS_LIBS list())

add_library(${LIB_NAME} ${SOURCE_FILES})
set_property(TARGET ${LIB_NAME} PROPERTY POSITION_INDEPENDENT_CODE ON)

add_executable(${PROJECT_NAME} ${Ark_SOURCE_DIR}/src/main.cpp)
target_link_libraries(${PROJECT_NAME} PUBLIC ${LIB_NAME})

if (UNIX OR LINUX)
    target_link_libraries(${LIB_NAME} PUBLIC ${LINUX_LIBS})
elseif (WIN32)
    target_link_libraries(${LIB_NAME} PUBLIC ${WINDOWS_LIBS})
endif()
target_link_libraries(${LIB_NAME} PUBLIC ${ALL_LIBS})

set_target_properties(
    ${LIB_NAME}
    PROPERTIES
        CXX_STANDARD 17
        CXX_STANDARD_REQUIRED ON
        CXX_EXTENSIONS OFF
)

set_target_properties(
    ${PROJECT_NAME}
    PROPERTIES
        CXX_STANDARD 17
        CXX_STANDARD_REQUIRED ON
        CXX_EXTENSIONS OFF
)

install(TARGETS ${PROJECT_NAME} DESTINATION bin)
install(DIRECTORY ${PROJECT_SOURCE_DIR}/bin DESTINATION share/${PROJECT_NAME})