CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(cppmie)
set(PROJECT_VERSION 1.0.1)
set(PROJECT_HOMEPAGE_URL https://github.com/codesaurus97/cppmie)

# Require C++ 20 due to usage of concepts
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED True)

set(CMAKE_CXX_FLAGS_RELEASE "-O3")

include(GNUInstallDirs)

# --- Fetch Google Test for Unit Testing ---
include(FetchContent)
FetchContent_Declare(
        googletest
        # Specify the commit you depend on and update it regularly.
        URL https://github.com/google/googletest/archive/e2239ee6043f73722e7aa812a459f54a28552929.zip
)
# For Windows: Prevent overriding the parent project's compiler/linker settings
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
FetchContent_MakeAvailable(googletest)

# --- Library Definition
add_library(${PROJECT_NAME} INTERFACE)
target_include_directories(
        ${PROJECT_NAME}
        INTERFACE $<BUILD_INTERFACE:${${PROJECT_NAME}_SOURCE_DIR}/include>
        $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)

target_compile_features(${PROJECT_NAME} INTERFACE cxx_std_20)

install(TARGETS ${PROJECT_NAME}
        EXPORT ${PROJECT_NAME}_Targets
        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})

include(CMakePackageConfigHelpers)
write_basic_package_version_file("${PROJECT_NAME}ConfigVersion.cmake"
        VERSION ${PROJECT_VERSION}
        COMPATIBILITY SameMajorVersion)

configure_package_config_file(
        "${PROJECT_SOURCE_DIR}/cmake/${PROJECT_NAME}Config.cmake.in"
        "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
        INSTALL_DESTINATION
        ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}/cmake)

install(EXPORT ${PROJECT_NAME}_Targets
        FILE ${PROJECT_NAME}Targets.cmake
        NAMESPACE ${PROJECT_NAME}::
        DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}/cmake)

install(FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
        "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
        DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}/cmake)

install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/${PROJECT_NAME} DESTINATION include)


# --- Executable to run benchmark on the mie scattering calculation ----------------------------------------------------
# TODO: Add benchmark to the cmakelist without adding it to the library
enable_testing()

add_executable(test_mie_reference test/test_mie_reference.cc)
target_link_libraries(test_mie_reference PRIVATE cppmie gtest_main)

add_test(NAME "Mie Scattering Reference" COMMAND test_mie_reference)

# --- Benchmarks -------------------------------------------------------------------------------------------------------

#FetchContent_Declare(googlebenchmark
#        GIT_REPOSITORY https://github.com/google/benchmark.git
#        GIT_TAG master) # need master for benchmark::benchmark
#
#FetchContent_MakeAvailable(
#        googlebenchmark)

#add_executable(bench_mie_reference benchmark/bench_mie_reference.cc)
#target_compile_options(bench_mie_reference PRIVATE "-fno-omit-frame-pointer")
#target_link_libraries(bench_mie_reference PRIVATE cppmie benchmark::benchmark)
#add_test(NAME "Benchmark Reference" COMMAND bench_mie_reference)