# CMake 3.8 required for 17 to be a valid value for CXX_STANDARD
cmake_minimum_required(VERSION 3.8)

project(threeSD)

# Sanity check : Check that all submodules are present
# =======================================================================
function(check_submodules_present)
    file(READ "${PROJECT_SOURCE_DIR}/.gitmodules" gitmodules)
    string(REGEX MATCHALL "path *= *[^ \t\r\n]*" gitmodules ${gitmodules})
    foreach(module ${gitmodules})
        string(REGEX REPLACE "path *= *" "" module ${module})
        if (NOT EXISTS "${PROJECT_SOURCE_DIR}/${module}/.git")
            message(SEND_ERROR "Git submodule ${module} not found."
                    "Please run: git submodule update --init --recursive")
        endif()
    endforeach()
endfunction()
check_submodules_present()

# Configure C++ standard
# ===========================
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

# set up output paths for executable binaries
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)

# Include source code
# ===================
add_subdirectory(externals)
add_subdirectory(src)