# Some IDF-specific functions and functions

include(crosstool_version_check)

macro(idf_set_global_variables)

  set_default(EXTRA_COMPONENT_DIRS "")

  # PROJECT_PATH has the path to the IDF project (top-level cmake directory)
  #
  # (cmake calls this CMAKE_SOURCE_DIR, keeping old name for compatibility.)
  set(PROJECT_PATH "${CMAKE_SOURCE_DIR}")

  # Note: "main" is no longer a component...
  #
  set_default(COMPONENT_DIRS "${PROJECT_PATH}/components ${EXTRA_COMPONENT_DIRS} ${IDF_PATH}/components")
  spaces2list(COMPONENT_DIRS)

  spaces2list(COMPONENTS)

endmacro()

# Add all the IDF global compiler & preprocessor options
# (applied to all components). Some are config-dependent
#
# If you only want to set options for a particular component,
# don't call or edit this function. TODO DESCRIBE WHAT TO DO INSTEAD
#
function(idf_set_global_compiler_options)
  add_definitions(-DESP_PLATFORM)
  add_definitions(-DHAVE_CONFIG_H)

  if(CONFIG_OPTIMIZATION_LEVEL_RELEASE)
    add_compile_options(-Os)
  else()
    add_compile_options(-Og)
  endif()

  add_c_compile_options(-std=gnu99)

  add_cxx_compile_options(-std=gnu++11 -fno-rtti)

  if(CONFIG_CXX_EXCEPTIONS)
    add_cxx_compile_options(-fexceptions)
  else()
    add_cxx_compile_options(-fno-exceptions)
  endif()

  # Default compiler configuration
  add_compile_options(-ffunction-sections -fdata-sections -fstrict-volatile-bitfields -mlongcalls -nostdlib)

  # Default warnings configuration
  add_compile_options(-Wall -Werror=all -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wextra -Wno-unused-parameter -Wno-sign-compare)
  add_c_compile_options(-Wno-old-style-declaration)

  # Stack protection
  if(NOT BOOTLOADER_BUILD)
    if(CONFIG_STACK_CHECK_NORM)
      add_compile_options(-fstack-protector)
    elseif(CONFIG_STACK_CHECK_STRONG)
      add_compile_options(-fstack-protector-strong)
    elseif(CONFIG_STACK_CHECK_ALL)
      add_compile_options(-fstack-protector-all)
    endif()
  endif()

  if(CONFIG_OPTIMIZATION_ASSERTIONS_DISABLED)
    add_definitions(-DNDEBUG)
  endif()

  # Always generate debug symbols (even in Release mode, these don't
  # go into the final binary so have no impact on size)
  add_compile_options(-ggdb)

  add_compile_options("-I${CMAKE_BINARY_DIR}") # for sdkconfig.h

endfunction(idf_set_global_compiler_options)

# Override add_executable to add IDF-specific
# linker flags & map file to all built executables
function(add_executable target)
  get_filename_component(basename ${target} NAME_WE)
  set(mapfile "${basename}.map")

  _add_executable(${ARGV})

  target_link_libraries(${target} "-Wl,--gc-sections -Wl,--cref -Wl,--Map=${mapfile} -Wl,--start-group")

  set_property(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}" APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES "${CMAKE_CURRENT_BINARY_DIR}/${mapfile}")
endfunction(add_executable)


# Verify the IDF environment is configured correctly (environment, toolchain, etc)
function(idf_verify_environment)

  # Check toolchain is configured properly in cmake
  if(NOT ( ${CMAKE_SYSTEM_NAME} STREQUAL "Generic" AND ${CMAKE_C_COMPILER} MATCHES xtensa))
    message(FATAL_ERROR "The parent project CMakeLists.txt file needs to set CMAKE_TOOLCHAIN_FILE "
      "before including this file. "
      "Update CMakeLists.txt to match the template project and delete CMakeCache.txt before "
      "re-running cmake.")
  endif()

  #
  # Warn if the toolchain version doesn't match
  #
  gcc_version_check("5.2.0")
  crosstool_version_check("1.22.0-80-g6c4433a")

endfunction()