cmake_minimum_required(VERSION 3.13)
project(Arbutils)

# Enable all warnings, and make them error when occurring.
add_compile_options(-Wall -Wextra -Werror)
# We like new stuff, so set the c++ standard to c++20.
set(CMAKE_CXX_STANDARD 20)

option(WINDOWS "Whether the build target is Windows or not." OFF)
option(SHARED "Whether we should build a shared library, instead of a static one." OFF)
option(TESTS "Whether the test executable should be build as well." OFF)
option(STATICC "Whether gcc and stdc++ should be linked statically to the library." OFF)

# Set whether we want a static or shared library.
set(LIBTYPE STATIC)
if (SHARED)
    set(LIBTYPE SHARED)
endif (SHARED)

# Grab all cpp and hpp files in our source directories.
file(GLOB_RECURSE SRC_FILES "src/*.cpp" "src/*.hpp" "CInterface/*.cpp" "CInterface/*.hpp")
add_library(Arbutils ${LIBTYPE} ${SRC_FILES})

if (TESTS)
    # If we want a tests executable, grab all tests source files
    file(GLOB_RECURSE TEST_FILES "tests/*.cpp" "tests/*.hpp")
    # And create an executable from it. Also include catch.hpp.
    add_executable(ArbutilsTests ${TEST_FILES} extern/catch.hpp)
    # And finally link the library to the executable.
    target_link_libraries(ArbutilsTests Arbutils)
    # Add a compilation definition to the code that we are building a test build.
    target_compile_definitions(ArbutilsTests PRIVATE TESTS_BUILD)
endif ()

# If we are building for Windows we need to set some specific variables.
if (WINDOWS)
    MESSAGE(WARNING, "Using Windows Build.")
    # Add a definition for the compiler, so we can use it in C++ as well.
    ADD_DEFINITIONS(-D WINDOWS=1)
    # -m64: Build a 64 bit library
    add_compile_options(-m64)
endif (WINDOWS)

set(LINKS)
if (NOT WINDOWS)
    # Include debug symbols in all linux builds
    add_compile_options(-g -gfull -g3)
    set(LINKS ${LINKS} -ldw)
endif()
# If we want to link the C and C++ library statically, link those as well.
if (STATICC)
    set(LINKS ${LINKS} -static-libgcc -static-libstdc++)
endif(STATICC)
target_link_libraries(Arbutils ${LINKS})

# If we aren't building for Windows, also include an option for installing on unix.
if (NOT WINDOWS)
    install(TARGETS Arbutils
            CONFIGURATIONS Release
            RUNTIME DESTINATION lib)
endif()