make build for iOS

cpp/CMakeLists.txt

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+cmake_minimum_required (VERSION 3.18)
+project (example-ios)
+enable_testing()
+
+enable_language(CXX)
+enable_language(OBJC)
+
+MESSAGE( STATUS "CMAKE_CXX_FLAGS: " ${CMAKE_CXX_FLAGS} )
+MESSAGE( STATUS "CMAKE_OBJC_FLAGS: " ${CMAKE_OBJC_FLAGS} )
+
+# Add some sanitary checks that the toolchain is actually working!
+include(CheckCXXSymbolExists)
+check_cxx_symbol_exists(kqueue sys/event.h HAVE_KQUEUE)
+if(NOT HAVE_KQUEUE)
+  message(STATUS "kqueue NOT found!")
+else()
+  message(STATUS "kqueue found!")
+endif()
+
+find_library(APPKIT_LIBRARY AppKit)
+if (NOT APPKIT_LIBRARY)
+  message(STATUS "AppKit.framework NOT found!")
+else()
+  message(STATUS "AppKit.framework found! ${APPKIT_LIBRARY}")
+endif()
+
+find_library(FOUNDATION_LIBRARY Foundation)
+if (NOT FOUNDATION_LIBRARY)
+  message(STATUS "Foundation.framework NOT found!")
+else()
+  message(STATUS "Foundation.framework found! ${FOUNDATION_LIBRARY}")
+endif()
+
+find_library(UIKIT_LIBRARY UIKit)
+if (NOT UIKIT_LIBRARY)
+  message(STATUS "UIKit.framework NOT found!")
+else()
+  message(STATUS "UIKit.framework found! ${UIKIT_LIBRARY}")
+endif()
+
+# Hook up XCTest for the supported plaforms (all but WatchOS)
+if(NOT PLATFORM MATCHES ".*WATCHOS.*")
+  # Use the standard find_package, broken between 3.14.0 and 3.14.4 at least for XCtest...
+  find_package(XCTest)
+  # Fallback: Try to find XCtest as host package via toochain macro (should always work)
+  find_host_package(XCTest REQUIRED)
+endif()
+
+# Includes
+include_directories(${example-ios_SOURCE_DIR})
+
+# Make sure try_compile() works
+include(CheckTypeSize)
+check_type_size(time_t SIZEOF_TIME_T)
+
+# Source files
+set(SOURCES
+  qrcodegen.cpp
+)
+
+# Headers
+set(HEADERS
+  qrcodegen.hpp
+)
+
+# Library
+if(BUILD_SHARED)
+  add_library (example SHARED ${SOURCES} ${HEADERS})
+  target_link_libraries(example ${FOUNDATION_LIBRARY})
+  target_compile_definitions(example PUBLIC IS_BUILDING_SHARED)
+  message(STATUS "Building shared version...")
+else()
+  add_library (example STATIC ${SOURCES} ${HEADERS})
+  target_link_libraries(example ${FOUNDATION_LIBRARY})
+  message(STATUS "Building static version...")
+endif()
+
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX ${example-ios_SOURCE_DIR}/../example-app/example-lib CACHE PATH "Install path" FORCE)
+endif(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+
+# Executable
+if(PLATFORM MATCHES "MAC.*")
+  set(APP_NAME TestApp)
+  add_executable (${APP_NAME} MACOSX_BUNDLE main.cpp)
+  set_target_properties(${APP_NAME} PROPERTIES
+          BUNDLE True
+          MACOSX_BUNDLE_GUI_IDENTIFIER codetoanbug.com.qrcreator
+          MACOSX_BUNDLE_BUNDLE_NAME qrcreator
+          MACOSX_BUNDLE_BUNDLE_VERSION "0.1"
+          MACOSX_BUNDLE_SHORT_VERSION_STRING "0.1"
+          )
+  # Link the library with the executable
+  target_link_libraries(${APP_NAME} example)
+endif()
+
+# Debug symbols set in XCode project
+set_xcode_property(example GCC_GENERATE_DEBUGGING_SYMBOLS YES "All")
+
+# Installation
+if(PLATFORM MATCHES "MAC.*")
+  install(TARGETS ${APP_NAME}
+          BUNDLE DESTINATION . COMPONENT Runtime
+          RUNTIME DESTINATION bin COMPONENT Runtime
+          LIBRARY DESTINATION lib
+          ARCHIVE DESTINATION lib/static)
+
+  # Note Mac specific extension .app
+  set(APPS "\${CMAKE_INSTALL_PREFIX}/${APP_NAME}.app")
+
+  # Directories to look for dependencies
+  set(DIRS ${CMAKE_BINARY_DIR})
+
+  install(CODE "include(BundleUtilities)
+    fixup_bundle(\"${APPS}\" \"\" \"${DIRS}\")")
+
+  set(CPACK_GENERATOR "DRAGNDROP")
+  include(CPack)
+else()
+  install(TARGETS example
+          LIBRARY DESTINATION lib
+          ARCHIVE DESTINATION lib/static)
+endif()
+install (FILES ${HEADERS} DESTINATION include)

cpp/README.md

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+## How to build for iOS:
+```bash
+cd cpp
+cmake -B build -G Xcode -DCMAKE_TOOLCHAIN_FILE=../../ios.toolchain.cmake -DPLATFORM=OS64
+cmake --build build --config Release
+```
+
+## How to build for simulator:
+```bash
+cd cpp
+cmake -B build -G Xcode -DCMAKE_TOOLCHAIN_FILE=../../ios.toolchain.cmake -DPLATFORM=SIMULATORARM64
+cmake --build build --config Release
+```
+