# This file is part of the ios-cmake project. It was retrieved from

# https://github.com/cristeab/ios-cmake.git, which is a fork of

# https://code.google.com/p/ios-cmake/. Which in turn is based off of

# the Platform/Darwin.cmake and Platform/UnixPaths.cmake files which

# are included with CMake 2.8.4

#

# The ios-cmake project is licensed under the new BSD license.

#

# Copyright (c) 2014, Bogdan Cristea and LTE Engineering Software,

# Kitware, Inc., Insight Software Consortium.  All rights reserved.

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

# 1. Redistributions of source code must retain the above copyright

# notice, this list of conditions and the following disclaimer.

#

# 2. Redistributions in binary form must reproduce the above copyright

# notice, this list of conditions and the following disclaimer in the

# documentation and/or other materials provided with the distribution.

#

# 3. Neither the name of the copyright holder nor the names of its

# contributors may be used to endorse or promote products derived from

# this software without specific prior written permission.

#

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

#

# This file is based off of the Platform/Darwin.cmake and

# Platform/UnixPaths.cmake files which are included with CMake 2.8.4

# It has been altered for iOS development.

#

# Updated by Alex Stewart (alexs.mac@gmail.com).

# The following variables control the behaviour of this toolchain:

#

# IOS_PLATFORM: OS (default) or SIMULATOR or SIMULATOR64

#    OS = Build for iPhoneOS.

#    SIMULATOR = Build for x86 i386 iPhone Simulator.

#    SIMULATOR64 = Build for x86 x86_64 iPhone Simulator.

# CMAKE_OSX_SYSROOT: Path to the iOS SDK to use.  By default this is

#    automatically determined from IOS_PLATFORM and xcodebuild, but

#    can also be manually specified (although this should not be required).

# CMAKE_IOS_DEVELOPER_ROOT: Path to the Developer directory for the iOS platform

#    being compiled for.  By default this is automatically determined from

#    CMAKE_OSX_SYSROOT, but can also be manually specified (although this should

#    not be required).

#

# This toolchain defines the following variables for use externally:

#

# XCODE_VERSION: Version number (not including Build version) of Xcode detected.

# IOS_SDK_VERSION: Version of iOS SDK being used.

# CMAKE_OSX_ARCHITECTURES: Architectures being compiled for (generated from

#    IOS_PLATFORM).

#

# This toolchain defines the following macros for use externally:

#

# set_xcode_property (TARGET XCODE_PROPERTY XCODE_VALUE)

#   A convenience macro for setting xcode specific properties on targets

#   example: set_xcode_property (myioslib IPHONEOS_DEPLOYMENT_TARGET "3.1").

#

# find_host_package (PROGRAM ARGS)

#   A macro used to find executable programs on the host system, not within the

#   iOS environment.  Thanks to the android-cmake project for providing the

#   command.

# Get the Xcode version being used.

execute_process(COMMAND xcodebuild -version

  OUTPUT_VARIABLE XCODE_VERSION

  ERROR_QUIET

  OUTPUT_STRIP_TRAILING_WHITESPACE)

string(REGEX MATCH "Xcode [0-9\\.]+" XCODE_VERSION "${XCODE_VERSION}")

string(REGEX REPLACE "Xcode ([0-9\\.]+)" "\\1" XCODE_VERSION "${XCODE_VERSION}")

message(STATUS "Building with Xcode version: ${XCODE_VERSION}")

# Default to building for iPhoneOS if not specified otherwise, and we cannot

# determine the platform from the CMAKE_OSX_ARCHITECTURES variable.  The use

# of CMAKE_OSX_ARCHITECTURES is such that try_compile() projects can correctly

# determine the value of IOS_PLATFORM from the root project, as

# CMAKE_OSX_ARCHITECTURES is propagated to them by CMake.

if (NOT DEFINED IOS_PLATFORM)

  if (CMAKE_OSX_ARCHITECTURES)

    if (CMAKE_OSX_ARCHITECTURES MATCHES ".*arm.*")

      set(IOS_PLATFORM "OS")

    elseif (CMAKE_OSX_ARCHITECTURES MATCHES "i386")

      set(IOS_PLATFORM "SIMULATOR")

    elseif (CMAKE_OSX_ARCHITECTURES MATCHES "x86_64")

      set(IOS_PLATFORM "SIMULATOR64")

    endif()

  endif()

  if (NOT IOS_PLATFORM)

    set(IOS_PLATFORM "OS")

  endif()

endif()

set(IOS_PLATFORM ${IOS_PLATFORM} CACHE STRING

  "Type of iOS platform for which to build.")

# Determine the platform name and architectures for use in xcodebuild commands

# from the specified IOS_PLATFORM name.

if (IOS_PLATFORM STREQUAL "OS")

  set(XCODE_IOS_PLATFORM iphoneos)

  set(IOS_ARCH armv7 armv7s arm64)

elseif (IOS_PLATFORM STREQUAL "SIMULATOR")

  set(XCODE_IOS_PLATFORM iphonesimulator)

  set(IOS_ARCH i386)

elseif(IOS_PLATFORM STREQUAL "SIMULATOR64")

  set(XCODE_IOS_PLATFORM iphonesimulator)

  set(IOS_ARCH x86_64)

else()

  message(FATAL_ERROR "Invalid IOS_PLATFORM: ${IOS_PLATFORM}")

endif()

message(STATUS "Configuring iOS build for platform: ${IOS_PLATFORM}, "

  "architecture(s): ${IOS_ARCH}")

# If user did not specify the SDK root to use, then query xcodebuild for it.

if (NOT CMAKE_OSX_SYSROOT)

  execute_process(COMMAND xcodebuild -version -sdk ${XCODE_IOS_PLATFORM} Path

    OUTPUT_VARIABLE CMAKE_OSX_SYSROOT

    ERROR_QUIET

    OUTPUT_STRIP_TRAILING_WHITESPACE)

  message(STATUS "Using SDK: ${CMAKE_OSX_SYSROOT} for platform: ${IOS_PLATFORM}")

endif()

if (NOT EXISTS ${CMAKE_OSX_SYSROOT})

  message(FATAL_ERROR "Invalid CMAKE_OSX_SYSROOT: ${CMAKE_OSX_SYSROOT} "

    "does not exist.")

endif()

# Get the SDK version information.

execute_process(COMMAND xcodebuild -sdk ${CMAKE_OSX_SYSROOT} -version SDKVersion

  OUTPUT_VARIABLE IOS_SDK_VERSION

  ERROR_QUIET

  OUTPUT_STRIP_TRAILING_WHITESPACE)

# Find the Developer root for the specific iOS platform being compiled for

# from CMAKE_OSX_SYSROOT.  Should be ../../ from SDK specified in

# CMAKE_OSX_SYSROOT.  There does not appear to be a direct way to obtain

# this information from xcrun or xcodebuild.

if (NOT CMAKE_IOS_DEVELOPER_ROOT)

  get_filename_component(IOS_PLATFORM_SDK_DIR ${CMAKE_OSX_SYSROOT} PATH)

  get_filename_component(CMAKE_IOS_DEVELOPER_ROOT ${IOS_PLATFORM_SDK_DIR} PATH)

endif()

if (NOT EXISTS ${CMAKE_IOS_DEVELOPER_ROOT})

  message(FATAL_ERROR "Invalid CMAKE_IOS_DEVELOPER_ROOT: "

    "${CMAKE_IOS_DEVELOPER_ROOT} does not exist.")

endif()

# Find the C & C++ compilers for the specified SDK.

if (NOT CMAKE_C_COMPILER)

  execute_process(COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT} -find clang

    OUTPUT_VARIABLE CMAKE_C_COMPILER

    ERROR_QUIET

    OUTPUT_STRIP_TRAILING_WHITESPACE)

  message(STATUS "Using C compiler: ${CMAKE_C_COMPILER}")

endif()

if (NOT CMAKE_CXX_COMPILER)

  execute_process(COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT} -find clang++

    OUTPUT_VARIABLE CMAKE_CXX_COMPILER

    ERROR_QUIET

    OUTPUT_STRIP_TRAILING_WHITESPACE)

  message(STATUS "Using CXX compiler: ${CMAKE_CXX_COMPILER}")

endif()

# Find (Apple's) libtool.

execute_process(COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT} -find libtool

  OUTPUT_VARIABLE IOS_LIBTOOL

  ERROR_QUIET

  OUTPUT_STRIP_TRAILING_WHITESPACE)

message(STATUS "Using libtool: ${IOS_LIBTOOL}")

# Configure libtool to be used instead of ar + ranlib to build static libraries.

# This is required on Xcode 7+, but should also work on previous versions of

# Xcode.

set(CMAKE_C_CREATE_STATIC_LIBRARY

  "${IOS_LIBTOOL} -static -o <TARGET> <LINK_FLAGS> <OBJECTS> ")

set(CMAKE_CXX_CREATE_STATIC_LIBRARY

  "${IOS_LIBTOOL} -static -o <TARGET> <LINK_FLAGS> <OBJECTS> ")

# Get the version of Darwin (OS X) of the host.

execute_process(COMMAND uname -r

  OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_VERSION

  ERROR_QUIET

  OUTPUT_STRIP_TRAILING_WHITESPACE)

# Standard settings.

set(CMAKE_SYSTEM_NAME Darwin)

set(CMAKE_SYSTEM_VERSION ${IOS_SDK_VERSION})

set(UNIX TRUE)

set(APPLE TRUE)

set(IOS TRUE)

# Force unset of OS X-specific deployment target (otherwise autopopulated),

# required as of cmake 2.8.10.

set(CMAKE_OSX_DEPLOYMENT_TARGET "" CACHE STRING

  "Must be empty for iOS builds." FORCE)

# Set the architectures for which to build.

set(CMAKE_OSX_ARCHITECTURES ${IOS_ARCH} CACHE STRING "Build architecture for iOS")

# Skip the platform compiler checks for cross compiling.

set(CMAKE_CXX_COMPILER_FORCED TRUE)

set(CMAKE_CXX_COMPILER_WORKS TRUE)

set(CMAKE_C_COMPILER_FORCED TRUE)

set(CMAKE_C_COMPILER_WORKS TRUE)

# All iOS/Darwin specific settings - some may be redundant.

set(CMAKE_SHARED_LIBRARY_PREFIX "lib")

set(CMAKE_SHARED_LIBRARY_SUFFIX ".dylib")

set(CMAKE_SHARED_MODULE_PREFIX "lib")

set(CMAKE_SHARED_MODULE_SUFFIX ".so")

set(CMAKE_MODULE_EXISTS 1)

set(CMAKE_DL_LIBS "")

set(CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG "-compatibility_version ")

set(CMAKE_C_OSX_CURRENT_VERSION_FLAG "-current_version ")

set(CMAKE_CXX_OSX_COMPATIBILITY_VERSION_FLAG "${CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG}")

set(CMAKE_CXX_OSX_CURRENT_VERSION_FLAG "${CMAKE_C_OSX_CURRENT_VERSION_FLAG}")

# Specify minimum version of deployment target.

# Unless specified, the latest SDK version is used by default.

set(IOS_DEPLOYMENT_TARGET "${IOS_SDK_VERSION}"

    CACHE STRING "Minimum iOS version to build for." )

message(STATUS "Building for minimum iOS version: ${IOS_DEPLOYMENT_TARGET}"

               " (SDK version: ${IOS_SDK_VERSION})")

# Note that only Xcode 7+ supports the newer more specific:

# -m${XCODE_IOS_PLATFORM}-version-min flags, older versions of Xcode use:

# -m(ios/ios-simulator)-version-min instead.

if (XCODE_VERSION VERSION_LESS 7.0)

  if (IOS_PLATFORM STREQUAL "OS")

    set(XCODE_IOS_PLATFORM_VERSION_FLAGS

      "-mios-version-min=${IOS_DEPLOYMENT_TARGET}")

  else()

    # SIMULATOR or SIMULATOR64 both use -mios-simulator-version-min.

    set(XCODE_IOS_PLATFORM_VERSION_FLAGS

      "-mios-simulator-version-min=${IOS_DEPLOYMENT_TARGET}")

  endif()

else()

  # Xcode 7.0+ uses flags we can build directly from XCODE_IOS_PLATFORM.

  set(XCODE_IOS_PLATFORM_VERSION_FLAGS

    "-m${XCODE_IOS_PLATFORM}-version-min=${IOS_DEPLOYMENT_TARGET}")

endif()

set(CMAKE_C_FLAGS

  "${XCODE_IOS_PLATFORM_VERSION_FLAGS} -fobjc-abi-version=2 -fobjc-arc ${CMAKE_C_FLAGS}")

# Hidden visibilty is required for C++ on iOS.

set(CMAKE_CXX_FLAGS

  "${XCODE_IOS_PLATFORM_VERSION_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden -fobjc-abi-version=2 -fobjc-arc ${CMAKE_CXX_FLAGS}")

set(CMAKE_CXX_FLAGS_RELEASE "-DNDEBUG -O3 -fomit-frame-pointer -ffast-math ${CMAKE_CXX_FLAGS_RELEASE}")

set(CMAKE_C_LINK_FLAGS "${XCODE_IOS_PLATFORM_VERSION_FLAGS} -Wl,-search_paths_first ${CMAKE_C_LINK_FLAGS}")

set(CMAKE_CXX_LINK_FLAGS "${XCODE_IOS_PLATFORM_VERSION_FLAGS}  -Wl,-search_paths_first ${CMAKE_CXX_LINK_FLAGS}")

# In order to ensure that the updated compiler flags are used in try_compile()

# tests, we have to forcibly set them in the CMake cache, not merely set them

# in the local scope.

list(APPEND VARS_TO_FORCE_IN_CACHE

  CMAKE_C_FLAGS

  CMAKE_CXX_FLAGS

  CMAKE_CXX_RELEASE

  CMAKE_C_LINK_FLAGS

  CMAKE_CXX_LINK_FLAGS)

foreach(VAR_TO_FORCE ${VARS_TO_FORCE_IN_CACHE})

  set(${VAR_TO_FORCE} "${${VAR_TO_FORCE}}" CACHE STRING "" FORCE)

endforeach()

set(CMAKE_PLATFORM_HAS_INSTALLNAME 1)

set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-dynamiclib -headerpad_max_install_names")

set(CMAKE_SHARED_MODULE_CREATE_C_FLAGS "-bundle -headerpad_max_install_names")

set(CMAKE_SHARED_MODULE_LOADER_C_FLAG "-Wl,-bundle_loader,")

set(CMAKE_SHARED_MODULE_LOADER_CXX_FLAG "-Wl,-bundle_loader,")

set(CMAKE_FIND_LIBRARY_SUFFIXES ".dylib" ".so" ".a")

# Hack: if a new cmake (which uses CMAKE_INSTALL_NAME_TOOL) runs on an old

# build tree (where install_name_tool was hardcoded) and where

# CMAKE_INSTALL_NAME_TOOL isn't in the cache and still cmake didn't fail in

# CMakeFindBinUtils.cmake (because it isn't rerun) hardcode

# CMAKE_INSTALL_NAME_TOOL here to install_name_tool, so it behaves as it did

# before, Alex.

if (NOT DEFINED CMAKE_INSTALL_NAME_TOOL)

  find_program(CMAKE_INSTALL_NAME_TOOL install_name_tool)

endif (NOT DEFINED CMAKE_INSTALL_NAME_TOOL)

# Set the find root to the iOS developer roots and to user defined paths.

set(CMAKE_FIND_ROOT_PATH ${CMAKE_IOS_DEVELOPER_ROOT} ${CMAKE_OSX_SYSROOT}

  ${CMAKE_PREFIX_PATH} CACHE string  "iOS find search path root" FORCE)

# Default to searching for frameworks first.

set(CMAKE_FIND_FRAMEWORK FIRST)

# Set up the default search directories for frameworks.

set(CMAKE_SYSTEM_FRAMEWORK_PATH

  ${CMAKE_OSX_SYSROOT}/System/Library/Frameworks

  ${CMAKE_OSX_SYSROOT}/System/Library/PrivateFrameworks

  ${CMAKE_OSX_SYSROOT}/Developer/Library/Frameworks)

# Only search the specified iOS SDK, not the remainder of the host filesystem.

set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)

set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)

set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

# This little macro lets you set any XCode specific property.

macro(set_xcode_property TARGET XCODE_PROPERTY XCODE_VALUE)

  set_property(TARGET ${TARGET} PROPERTY

    XCODE_ATTRIBUTE_${XCODE_PROPERTY} ${XCODE_VALUE})

endmacro(set_xcode_property)

# This macro lets you find executable programs on the host system.

macro(find_host_package)

  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)

  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER)

  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER)

  set(IOS FALSE)

  find_package(${ARGN})

  set(IOS TRUE)

  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)

  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)

  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

endmacro(find_host_package)