if("x${CMAKE_SOURCE_DIR}" STREQUAL "x${CMAKE_BINARY_DIR}")
  message(FATAL_ERROR "\
In-source build is not a good practice.
Please use:
  mkdir build
  cd build
  cmake ..
to build this project"
  )
endif()

if(CMAKE_TOOLCHAIN_FILE)
  set(_BUILD_PYTHON OFF)
  set(_BUILD_TESTS OFF)
else()
  set(_BUILD_PYTHON ON)
  set(_BUILD_TESTS ON)
endif()

if(POLICY CMP0057)
  cmake_policy(SET CMP0057 NEW)
endif()

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(kaldi-native-fbank CXX C)

set(KALDI_NATIVE_FBANK_VERSION "1.20.0")

# Disable warning about
#
# "The DOWNLOAD_EXTRACT_TIMESTAMP option was not given and policy CMP0135 is
#  not set.
if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.24.0")
  cmake_policy(SET CMP0135 NEW)
endif()

if(NOT CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE Release)
endif()

message(STATUS "CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}")

set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")

set(CMAKE_SKIP_BUILD_RPATH FALSE)
set(BUILD_RPATH_USE_ORIGIN TRUE)
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)

if(NOT APPLE)
  set(kaldi_native_fbank_rpath_origin "$ORIGIN")
else()
  set(kaldi_native_fbank_rpath_origin "@loader_path")
endif()

set(CMAKE_INSTALL_RPATH ${kaldi_native_fbank_rpath_origin})
set(CMAKE_BUILD_RPATH ${kaldi_native_fbank_rpath_origin})

set(CMAKE_CXX_STANDARD 14 CACHE STRING "The C++ version to be used.")

if(NOT DEFINED BUILD_SHARED_LIBS)
  set(BUILD_SHARED_LIBS ON)
endif()

# See
# https://stackoverflow.com/questions/33062728/cmake-link-shared-library-on-windows
if(BUILD_SHARED_LIBS AND MSVC)
  set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
endif()
message(STATUS "CMAKE_EXPORT_COMPILE_COMMANDS: ${CMAKE_EXPORT_COMPILE_COMMANDS}")

message(STATUS "BUILD_SHARED_LIBS: ${BUILD_SHARED_LIBS}")

option(KALDI_NATIVE_FBANK_BUILD_TESTS "Whether to build tests or not" ${_BUILD_TESTS})
option(KALDI_NATIVE_FBANK_BUILD_PYTHON "Whether to build Python extension" ${_BUILD_PYTHON})
option(KALDI_NATIVE_FBANK_ENABLE_CHECK "Whether to build with log" OFF)

message(STATUS "KALDI_NATIVE_FBANK_BUILD_TESTS: ${KALDI_NATIVE_FBANK_BUILD_TESTS}")
message(STATUS "KALDI_NATIVE_FBANK_BUILD_PYTHON: ${KALDI_NATIVE_FBANK_BUILD_PYTHON}")
message(STATUS "KALDI_NATIVE_FBANK_ENABLE_CHECK: ${KALDI_NATIVE_FBANK_ENABLE_CHECK}")

list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)
list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake)

message(STATUS "KALDI_NATIVE_FBANK_ENABLE_CHECK: ${KALDI_NATIVE_FBANK_ENABLE_CHECK}")

if(WIN32)
  add_definitions(-DNOMINMAX) # Otherwise, std::max() and std::min() won't work
endif()

if(KALDI_NATIVE_FBANK_BUILD_PYTHON)
  include(pybind11)
endif()

if(KALDI_NATIVE_FBANK_BUILD_TESTS)
  enable_testing()
  include(googletest)
endif()

if(NOT CMAKE_INSTALL_PREFIX)
  set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install")
endif()

message(STATUS "CMAKE_CXX_FLAGS: ${CMAKE_CXX_FLAGS}")
message(STATUS "CMAKE_INSTALL_PREFIX: ${CMAKE_INSTALL_PREFIX}")

include(CheckIncludeFileCXX)
check_include_file_cxx(cxxabi.h KNF_HAVE_CXXABI_H)
check_include_file_cxx(execinfo.h KNF_HAVE_EXECINFO_H)

include_directories(${CMAKE_SOURCE_DIR})

if(WIN32 AND MSVC)
  # disable various warnings for MSVC
  # 4244: '=': conversion from 'double' to 'float', possible loss of data
  # 4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data
  # 4624: destructor was implicitly defined as deleted because a base class destructor is inaccessible or deleted
  set(disabled_warnings
      /wd4244
      /wd4267
      /wd4624
  )
  message(STATUS "Disabled warnings: ${disabled_warnings}")
  foreach(w IN LISTS disabled_warnings)
    string(APPEND CMAKE_CXX_FLAGS " ${w} ")
  endforeach()
endif()

add_subdirectory(kaldi-native-fbank)