# ##############################################################################
# libs/libxx/libcxx.cmake
#
# SPDX-License-Identifier: Apache-2.0
#
# Licensed to the Apache Software Foundation (ASF) under one or more contributor
# license agreements.  See the NOTICE file distributed with this work for
# additional information regarding copyright ownership.  The ASF licenses this
# file to you 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(NOT EXISTS ${CMAKE_CURRENT_LIST_DIR}/libcxx)

  set(LIBCXX_VERSION ${CONFIG_LIBCXX_VERSION})

  FetchContent_Declare(
    libcxx
    DOWNLOAD_NAME "libcxx-${LIBCXX_VERSION}.src.tar.xz"
    DOWNLOAD_DIR ${CMAKE_CURRENT_LIST_DIR}
    URL "https://github.com/llvm/llvm-project/releases/download/llvmorg-${LIBCXX_VERSION}/libcxx-${LIBCXX_VERSION}.src.tar.xz"
        SOURCE_DIR
        ${CMAKE_CURRENT_LIST_DIR}/libcxx
        BINARY_DIR
        ${CMAKE_BINARY_DIR}/libs/libc/libcxx
        CONFIGURE_COMMAND
        ""
        BUILD_COMMAND
        ""
        INSTALL_COMMAND
        ""
        TEST_COMMAND
        ""
    PATCH_COMMAND
      patch -p1 -d ${CMAKE_CURRENT_LIST_DIR}/libcxx <
      ${CMAKE_CURRENT_LIST_DIR}/0001_fix_stdatomic_h_miss_typedef.patch && patch
      -p3 -d ${CMAKE_CURRENT_LIST_DIR}/libcxx <
      ${CMAKE_CURRENT_LIST_DIR}/mbstate_t.patch && patch -p1 -d
      ${CMAKE_CURRENT_LIST_DIR}/libcxx <
      ${CMAKE_CURRENT_LIST_DIR}/0001-libcxx-remove-mach-time-h.patch && patch
      -p1 -d ${CMAKE_CURRENT_LIST_DIR}/libcxx <
      ${CMAKE_CURRENT_LIST_DIR}/0001-libcxx-fix-ld-errors.patch
    DOWNLOAD_NO_PROGRESS true
    TIMEOUT 30)

  FetchContent_GetProperties(libcxx)

  if(NOT libcxx_POPULATED)
    FetchContent_Populate(libcxx)
  endif()

endif()

nuttx_create_symlink(${CMAKE_CURRENT_LIST_DIR}/libcxx/include
                     ${CMAKE_BINARY_DIR}/include/libcxx)

configure_file(${CMAKE_CURRENT_LIST_DIR}/__config_site
               ${CMAKE_BINARY_DIR}/include/libcxx/__config_site COPYONLY)

set_property(
  TARGET nuttx
  APPEND
  PROPERTY NUTTX_CXX_INCLUDE_DIRECTORIES ${CMAKE_BINARY_DIR}/include/libcxx)

add_compile_definitions(_LIBCPP_BUILDING_LIBRARY)
if(CONFIG_LIBSUPCXX)
  add_compile_definitions(__GLIBCXX__)
endif()

set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS ON)

set(SRCS)
set(SRCSTMP)

file(GLOB SRCS ${CMAKE_CURRENT_LIST_DIR}/libcxx/src/*.cpp)
file(GLOB SRCSTMP ${CMAKE_CURRENT_LIST_DIR}/libcxx/src/experimental/*.cpp)
list(APPEND SRCS ${SRCSTMP})
file(GLOB SRCSTMP ${CMAKE_CURRENT_LIST_DIR}/libcxx/src/filesystem/*.cpp)
list(APPEND SRCS ${SRCSTMP})
file(GLOB SRCSTMP ${CMAKE_CURRENT_LIST_DIR}/libcxx/src/ryu/*.cpp)
list(APPEND SRCS ${SRCSTMP})

set(FLAGS -Wno-attributes -Wno-deprecated-declarations -Wno-shadow
          -Wno-sign-compare)

if(NOT DEFINED GCCVER)
  execute_process(COMMAND ${CMAKE_CXX_COMPILER} --version
                  OUTPUT_VARIABLE GCC_VERSION_OUTPUT)
  string(REGEX MATCH "\\+\\+.* ([0-9]+)\\.[0-9]+" GCC_VERSION_REGEX
               "${GCC_VERSION_OUTPUT}")
  set(GCCVER ${CMAKE_MATCH_1})
endif()

if(GCCVER EQUAL 12)
  list(APPEND FLAGS -Wno-maybe-uninitialized -Wno-alloc-size-larger-than)
endif()

nuttx_add_system_library(libcxx)
target_sources(libcxx PRIVATE ${SRCS})
target_compile_options(libcxx PRIVATE ${FLAGS})
if(CONFIG_LIBCXXABI)
  target_include_directories(
    libcxx BEFORE PRIVATE ${CMAKE_CURRENT_LIST_DIR}/libcxxabi/include)
endif()

target_include_directories(libcxx BEFORE
                           PRIVATE ${CMAKE_CURRENT_LIST_DIR}/libcxx/src)