CMakeLists.txt

cmake_minimum_required(VERSION 3.8)
project(result VERSION 0.1.0
  LANGUAGES CXX)
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED on)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/mason.cmake)

option(WERROR "Add -Werror flag to build (turns warnings into errors)" ON)

# configure optimization
if (CMAKE_BUILD_TYPE STREQUAL "Debug")
    set(OPTIMIZATION_FLAGS "-O0 -DDEBUG")
    message("-- Configuring debug build")
else()
    set(OPTIMIZATION_FLAGS "-O3 -DNDEBUG")
    message("-- Configuring release build")
endif()

set(DESIRED_WARNINGS "-Wall -Wextra -Wconversion -Wunreachable-code -Wuninitialized -pedantic-errors -Wold-style-cast -Wno-error=unused-variable -Wshadow -Wfloat-equal -Weffc++")
if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
  set(DESIRED_WARNINGS "${DESIRED_WARNINGS} -Wmost")
endif()

# Note: -D_GLIBCXX_USE_CXX11_ABI=0 is needed to support mason packages that are precompiled libs
# Currently we only depend on a header only library, but this will help avoid issues when more libs are added via mason
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OPTIMIZATION_FLAGS} -D_GLIBCXX_USE_CXX11_ABI=0 ${DESIRED_WARNINGS}")

if (WERROR)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
endif()

# mason_use is a mason function within the mason.cmake file and provides ready-to-go vars, like "STATIC_LIBS" and "INCLUDE_DIRS"
mason_use(catch VERSION 2.12.1 HEADER_ONLY)
include_directories(SYSTEM ${MASON_PACKAGE_catch_INCLUDE_DIRS})

execute_process(
    COMMAND uname -m 
    OUTPUT_VARIABLE UNAME_M
    OUTPUT_STRIP_TRAILING_WHITESPACE
)

if (UNAME_M STREQUAL "x86_64")
  mason_use(benchmark VERSION 1.4.1)
  include_directories(SYSTEM ${MASON_PACKAGE_benchmark_INCLUDE_DIRS})
endif()

include_directories("${PROJECT_SOURCE_DIR}/include")

file(GLOB TEST_SOURCES test/*.cpp)
add_executable(unit-tests ${TEST_SOURCES})

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(${PROJECT_NAME} INTERFACE cxx_std_20)
set(result_CMAKE_INSTALL_INCLUDEDIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}include")

# Install
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
  ${CMAKE_INSTALL_PREFIX}/${PROJECT_NAME}/cmake)

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

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

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

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