CMakeLists.txt

cmake_minimum_required(VERSION 3.15)
project(loxo VERSION 1.0.0 LANGUAGES CXX)
set(CMAKE_CXX_STANDARD 23)
set(CMAKE_C_STANDARD 23)

# set(CMAKE_CXX_STANDARD_REQUIRED ON)
# disable those additionial targets added by CTest
# see https://stackoverflow.com/questions/56089330/cmake-creates-lots-of-targets-i-didnt-specify
set_property(GLOBAL PROPERTY CTEST_TARGETS_ADDED 1)

# for codecrafters' test
if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux" AND NOT DEFINED ENV{AC_CPP_DEBUG})
  set(CMAKE_CXX_COMPILER "g++")
  set(CMAKE_MAKE_PROGRAM "make")
  set(CMAKE_C_COMPILER "gcc")
  add_compile_options(-Wno-deprecated -Wno-deprecated-declarations)
endif()

include_directories(driver/include)
include_directories(packages)
include_directories(shared)
include_directories(shared/include)
file(GLOB_RECURSE DRIVER_HEADER_FILES driver/include/*.hpp)
file(GLOB_RECURSE DRIVER_SOURCE_FILES driver/src/*.cpp)
file(GLOB_RECURSE SHARED_HEADER_FILES shared/include/*.hpp)

if(${CMAKE_GENERATOR} MATCHES "Visual Studio")
  message(STATUS "Visual Studio detected")
  include_directories("C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.42.34433/include")
endif()

option(AC_CPP_DEBUG "set the environment variable AC_CPP_DEBUG to enable debug mode" OFF)
option(USE_BOOST_CONTRACT "set the environment variable LOXO_USE_BOOST_CONTRACT to enable boost contract; only works when AC_CPP_DEBUG is enabled"
  OFF)
option(LOXO_BUILD_SHARED "build shared library" OFF)

if(DEFINED ENV{AC_CPP_DEBUG})
  if($ENV{AC_CPP_DEBUG} STREQUAL "ON")
    message(STATUS "Debug mode is ON. Corresponding macro features will be enabled: DEBUG, _DEBUG, DEBUG_, _DEBUG_, AC_CPP_DEBUG")
    set(AC_CPP_DEBUG ON)
    set(VCPKG_MANIFEST_MODE OFF)
    set(VCPKG_MANIFEST_INSTALL OFF)
    set(LOXO_BUILD_SHARED ON)
  endif()
endif()

# `add_compile_options` MUST be placed before `add_library` or `add_executable`;
# in other words, it has only had effect on the targets that are created after it.
if(AC_CPP_DEBUG)
  # MUST include at the TOP level CMakelists.txt otherwise Ctest will not work!!!
  # Why cmake makes it so hard to use?
  enable_testing()
  include(CTest)

  if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
    add_compile_options(-D_DEBUG -DDEBUG -D__DEBUG__ -DAC_CPP_DEBUG -Wimplicit-fallthrough -Wno-deprecated-declarations -Wno-deprecated

      # MinGW does can't get through the `source_location` in file `spdlog/logger.h:334`
      -DSPDLOG_NO_EXCEPTIONS -DSPDLOG_NO_SOURCE_LOC
    )
  elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
    add_compile_options(-D_DEBUG -DDEBUG -D__DEBUG__ -DAC_CPP_DEBUG -Wimplicit-fallthrough -Wno-deprecated-declarations -Wno-deprecated)
  elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
    add_compile_options(/EHsc /D_DEBUG /DDEBUG /D__DEBUG__ /DAC_CPP_DEBUG /wd4716 /wd4530 /wd4244)
    add_link_options(/DEBUG:FULL)
  endif()

  message(STATUS "CMAKE_CXX_COMPILER_ID: ${CMAKE_CXX_COMPILER_ID}")
endif()

# ## after testing, build as shared library can reduce the compile time, which is good when debugging.
# ## note: for some wired reasons, the library would not be rebuilt if `.cpp` are changed, and `.hpp` are unchanged;
# ##			so turn off the shared library temporarily.
if(LOXO_BUILD_SHARED)
  add_library(driver SHARED
    ${DRIVER_SOURCE_FILES}
    ${DRIVER_HEADER_FILES}
    ${SHARED_HEADER_FILES}
  )
  target_compile_options(driver PUBLIC
    $<$<OR:$<CXX_COMPILER_ID:GNU>,$<CXX_COMPILER_ID:Clang>>: -DLIBLOXO_SHARED>
    $<$<CXX_COMPILER_ID:MSVC>: /DLIBLOXO_SHARED>
  )
  set_target_properties(driver PROPERTIES LINKER_LANGUAGE CXX)
  message(STATUS "Building shared library")
else()
  add_library(driver STATIC
    ${DRIVER_HEADER_FILES}
    ${DRIVER_SOURCE_FILES}
    ${SHARED_HEADER_FILES}
  )
  set_target_properties(driver PROPERTIES LINKER_LANGUAGE CXX)
  message(STATUS "Building static library")
endif()

add_executable(interpreter
  tools/lox_interpreter.cpp
  shared/loxo_driver.cpp
  shared/execution_context.hpp
)

target_link_libraries(interpreter PUBLIC
  driver
)

if(AC_CPP_DEBUG)
  include(cmake/debug_mode.cmake)
  add_subdirectory(test)
  add_subdirectory(benchmark)
  add_subdirectory(demo)
endif()