cmake_minimum_required(VERSION 3.26)

project(flow)
set(CMAKE_CXX_STANDARD 17)
cmake_policy(SET CMP0144 NEW)

include(CMakeDependentOption)
include(CTest)
include(GNUInstallDirs)
enable_testing()
list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)

# -- Build options
option(BUILD_CHISEL_EMIT_TARGET "Emit verilog file with chisel" ON)
option(BUILD_USE_BLOOP "Whether to use bloop to speed up elaborate" OFF)
option(BUILD_SIM_TARGET "Whether to build verilator simulation binary" ON)
cmake_dependent_option(
  BUILD_SIM_NVBOARD_TARGET "Whether to build nvboard target" OFF
  "BUILD_SIM_TARGET" OFF)
option(ENABLE_YSYX_GIT_TRACKER "Ysyx tracker support" ON)
set(TOPMODULE
    "Flow"
    CACHE STRING "Topmodule name in chisel")
set(DIFFTEST_LIB
    ""
    CACHE FILEPATH "Dynamic library file used as difftest reference")
set(DIFFTEST_RESOURCE_DIR
    ""
    CACHE PATH "Dynamic library file used as difftest reference")

# -- Ysyx tracker, configure
if(ENABLE_YSYX_GIT_TRACKER)
  execute_process(COMMAND ${CMAKE_SOURCE_DIR}/../git_commit.sh "configure(npc)"
                  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/..)
endif()

# -- Check dependencies
if(BUILD_SIM_TARGET)
  find_package(verilator REQUIRED)
endif()
if(BUILD_SIM_NVBOARD_TARGET)
  find_package(SDL2 REQUIRED)
  find_package(SDL2_image REQUIRED)
endif()
find_package(CLI11 CONFIG REQUIRED)
find_package(spdlog REQUIRED)

option(ENABLE_SDB "Enable simple debugger" OFF)

find_library(NVBOARD_LIBRARY NAMES nvboard)
find_path(NVBOARD_INCLUDE_DIR NAMES nvboard.h)

if(BUILD_CHISEL_EMIT_TARGET)
  # FIXME: all scala source file are tracked here, cause all files to rebuild
  # after a source update.
  set(SCALA_CORE "${CMAKE_CURRENT_SOURCE_DIR}/core")
  set(CHISEL_MODULE_CLASS "${CMAKE_PROJECT_NAME}.${TOPMODULE}")

  set(CHISEL_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/${TOPMODULE}/vsrc)

  set(CHISEL_OUTPUT_VERILATOR_CONF ${CHISEL_OUTPUT_DIR}/conf.vlt)
  set(CHISEL_OUTPUT_TOPMODULE ${CHISEL_OUTPUT_DIR}/${TOPMODULE}.sv)
  set(CHISEL_EMIT_ARGS "--target-dir ${CHISEL_OUTPUT_DIR}")
endif()

# -- Build NVBoard executable
if(BUILD_SIM_NVBOARD_TARGET)
  add_subdirectory(csrc_nvboard)
endif()

# -- Build Verilator executable and add to test
add_subdirectory(utils)

add_subdirectory(csrc)

# -- Add build tracking
if(ENABLE_YSYX_GIT_TRACKER)
  add_custom_target(
    ysyx_git_tracer ALL
    COMMAND ${CMAKE_SOURCE_DIR}/../git_commit.sh
            "build_${CMAKE_PROJECT_NAME}_V${TOPMODULE}"
    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/..)
endif()