set(CMAKE_SYSTEM_NAME "iOS")
set(IOS TRUE)

# https://gitlab.kitware.com/cmake/cmake/-/issues/19655
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE BOTH)

set(SDK_TO_USE iphonesimulator)
set(CMAKE_OSX_ARCHITECTURES x86_64 CACHE STRING "OSX Architectures")
set(CMAKE_OSX_DEPLOYMENT_TARGET 12.0 CACHE STRING "OSX Deployment target")

if(NOT "${CMAKE_GENERATOR}" MATCHES "Xcode")
  message(FATAL_ERROR "Only Xcode as generator for iOS builds supported")
endif()

execute_process(COMMAND xcodebuild -version -sdk ${SDK_TO_USE} Path
  OUTPUT_VARIABLE CMAKE_OSX_SYSROOT
  ERROR_QUIET
  OUTPUT_STRIP_TRAILING_WHITESPACE
)
if(NOT DEFINED CMAKE_OSX_SYSROOT)
  message(FATAL_ERROR "Please make sure Xcode is installed")
endif()