cmake_minimum_required(VERSION 3.18)
project(
  versioned-map
  VERSION 0.0.1
  DESCRIPTION
    "A data structure for mvcc reads on bitwise-lexicographically-ordered keys."
  HOMEPAGE_URL "https://git.weaselab.dev/weaselab/versioned-map"
  LANGUAGES C CXX)
set(CMAKE_CXX_STANDARD 20)

file(WRITE ${CMAKE_BINARY_DIR}/version.txt ${PROJECT_VERSION})

include(CMakePushCheckState)
include(CheckCXXSourceCompiles)

set(DEFAULT_BUILD_TYPE "Release")

if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
  message(
    STATUS
      "Setting build type to '${DEFAULT_BUILD_TYPE}' as none was specified.")
  set(CMAKE_BUILD_TYPE
      "${DEFAULT_BUILD_TYPE}"
      CACHE STRING "Choose the type of build." FORCE)
  # Set the possible values of build type for cmake-gui
  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release"
                                               "MinSizeRel" "RelWithDebInfo")
endif()

add_compile_options(-fdata-sections -ffunction-sections -Wswitch-enum
                    -Werror=switch-enum -fPIC)

set(full_relro_flags "-pie;LINKER:-z,relro,-z,now,-z,noexecstack")
cmake_push_check_state()
list(APPEND CMAKE_REQUIRED_LINK_OPTIONS ${full_relro_flags})
check_cxx_source_compiles("int main(){}" HAS_FULL_RELRO FAIL_REGEX "warning:")
if(HAS_FULL_RELRO)
  add_link_options(${full_relro_flags})
endif()
cmake_pop_check_state()

set(version_script_flags LINKER:--version-script=${CMAKE_SOURCE_DIR}/linker.map)
cmake_push_check_state()
list(APPEND CMAKE_REQUIRED_LINK_OPTIONS ${version_script_flags})
check_cxx_source_compiles("int main(){}" HAS_VERSION_SCRIPT FAIL_REGEX
                          "warning:")
cmake_pop_check_state()

# This is encouraged according to
# https://valgrind.org/docs/manual/manual-core-adv.html#manual-core-adv.clientreq
include_directories(SYSTEM ${CMAKE_SOURCE_DIR}/third_party/valgrind)

if(APPLE)
  add_link_options(-Wl,-dead_strip)
else()
  add_link_options(-Wl,--gc-sections)
endif()

set(CMAKE_CXX_IMPLICIT_LINK_LIBRARIES "")

add_subdirectory(third_party)

add_library(versioned_map VersionedMap.cpp)
target_include_directories(versioned_map PUBLIC ${CMAKE_SOURCE_DIR}/include)