libgav1/cmake/libgav1_options.cmake

# Copyright 2019 The libgav1 Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

if(LIBGAV1_CMAKE_LIBGAV1_OPTIONS_CMAKE_)
  return()
endif() # LIBGAV1_CMAKE_LIBGAV1_OPTIONS_CMAKE_
set(LIBGAV1_CMAKE_LIBGAV1_OPTIONS_CMAKE_)

# Simple wrapper for CMake's builtin option command that tracks libgav1's build
# options in the list variable $libgav1_options.
macro(libgav1_option)
  unset(option_NAME)
  unset(option_HELPSTRING)
  unset(option_VALUE)
  unset(optional_args)
  unset(multi_value_args)
  set(single_value_args NAME HELPSTRING VALUE)
  cmake_parse_arguments(option "${optional_args}" "${single_value_args}"
                        "${multi_value_args}" ${ARGN})

  if(NOT (option_NAME AND option_HELPSTRING AND DEFINED option_VALUE))
    message(FATAL_ERROR "libgav1_option: NAME HELPSTRING and VALUE required.")
  endif()

  option(${option_NAME} ${option_HELPSTRING} ${option_VALUE})

  if(LIBGAV1_VERBOSE GREATER 2)
    message("--------- libgav1_option ---------\n"
            "option_NAME=${option_NAME}\n"
            "option_HELPSTRING=${option_HELPSTRING}\n"
            "option_VALUE=${option_VALUE}\n"
            "------------------------------------------\n")
  endif()

  list(APPEND libgav1_options ${option_NAME})
  list(REMOVE_DUPLICATES libgav1_options)
endmacro()

# Dumps the $libgav1_options list via CMake message command.
macro(libgav1_dump_options)
  foreach(option_name ${libgav1_options})
    message("${option_name}: ${${option_name}}")
  endforeach()
endmacro()