cmake: update configuration for iOS

cmake/OpenCVCompilerOptions.cmake

@@ -336,7 +336,7 @@ if(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_OPENCV_GCC_VERSION_NUM GREATER 399)
   add_extra_compiler_option(-fvisibility-inlines-hidden)
 endif()
 
-if(NOT OPENCV_FP16_DISABLE)
+if(NOT OPENCV_FP16_DISABLE AND NOT IOS)
   if(ARM AND ENABLE_NEON)
     set(FP16_OPTION "-mfpu=neon-fp16")
   elseif((X86 OR X86_64) AND NOT MSVC AND ENABLE_AVX)

platforms/ios/build_framework.py

@@ -94,8 +94,7 @@ class Builder:
             sys.exit(1)
 
     def getToolchain(self, arch, target):
-        toolchain = os.path.join(self.opencv, "platforms", "ios", "cmake", "Toolchains", "Toolchain-%s_Xcode.cmake" % target)
+        return None
-        return toolchain
 
     def getCMakeArgs(self, arch, target):
         args = [
@@ -192,6 +191,20 @@ class Builder:
             d = os.path.join(framework_dir, *l[1])
             os.symlink(s, d)
 
+class iOSBuilder(Builder):
+
+    def getToolchain(self, arch, target):
+        toolchain = os.path.join(self.opencv, "platforms", "ios", "cmake", "Toolchains", "Toolchain-%s_Xcode.cmake" % target)
+        return toolchain
+
+    def getCMakeArgs(self, arch, target):
+        args = Builder.getCMakeArgs(self, arch, target)
+        args = args + [
+            '-DIOS_ARCH=%s' % arch
+        ]
+        return args
+
+
 if __name__ == "__main__":
     folder = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), "../.."))
     parser = argparse.ArgumentParser(description='The script builds OpenCV.framework for iOS.')
@@ -201,7 +214,7 @@ if __name__ == "__main__":
     parser.add_argument('--without', metavar='MODULE', default=[], action='append', help='OpenCV modules to exclude from the framework')
     args = parser.parse_args()
 
-    b = Builder(args.opencv, args.contrib, args.without,
+    b = iOSBuilder(args.opencv, args.contrib, args.without,
         [
             ("armv7", "iPhoneOS"),
             ("arm64", "iPhoneOS"),

platforms/ios/cmake/Toolchains/Toolchain-iPhoneOS_Xcode.cmake

@@ -1,31 +1,4 @@
-message (STATUS "Setting up iPhoneOS toolchain")
+message(STATUS "Setting up iPhoneOS toolchain for IOS_ARCH='${IOS_ARCH}'")
-set (IPHONEOS TRUE)
+set(IPHONEOS TRUE)
-
+include(${CMAKE_CURRENT_LIST_DIR}/common-ios-toolchain.cmake)
-# Standard settings
+message(STATUS "iPhoneOS toolchain loaded")
-set (CMAKE_SYSTEM_NAME iOS)
-# Include extra modules for the iOS platform files
-set (CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/platforms/ios/cmake/Modules")
-
-# Force the compilers to clang for iOS
-include (CMakeForceCompiler)
-#CMAKE_FORCE_C_COMPILER (clang GNU)
-#CMAKE_FORCE_CXX_COMPILER (clang++ GNU)
-
-set (CMAKE_C_SIZEOF_DATA_PTR 4)
-set (CMAKE_C_HAS_ISYSROOT 1)
-set (CMAKE_C_COMPILER_ABI ELF)
-set (CMAKE_CXX_SIZEOF_DATA_PTR 4)
-set (CMAKE_CXX_HAS_ISYSROOT 1)
-set (CMAKE_CXX_COMPILER_ABI ELF)
-
-# Skip the platform compiler checks for cross compiling
-set (CMAKE_CXX_COMPILER_WORKS TRUE)
-set (CMAKE_C_COMPILER_WORKS TRUE)
-
-# Search for programs in the build host directories
-SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
-#   for libraries and headers in the target directories
-SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
-SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
-
-message (STATUS "iPhoneOS toolchain loaded")

platforms/ios/cmake/Toolchains/Toolchain-iPhoneSimulator_Xcode.cmake

@@ -1,31 +1,4 @@
-message (STATUS "Setting up iPhoneSimulator toolchain")
+message(STATUS "Setting up iPhoneSimulator toolchain for IOS_ARCH='${IOS_ARCH}'")
-set (IPHONESIMULATOR TRUE)
+set(IPHONESIMULATOR TRUE)
-
+include(${CMAKE_CURRENT_LIST_DIR}/common-ios-toolchain.cmake)
-# Standard settings
+message(STATUS "iPhoneSimulator toolchain loaded")
-set (CMAKE_SYSTEM_NAME iOS)
-# Include extra modules for the iOS platform files
-set (CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/platforms/ios/cmake/Modules")
-
-# Force the compilers to clang for iOS
-include (CMakeForceCompiler)
-#CMAKE_FORCE_C_COMPILER (clang GNU)
-#CMAKE_FORCE_CXX_COMPILER (clang++ GNU)
-
-set (CMAKE_C_SIZEOF_DATA_PTR 4)
-set (CMAKE_C_HAS_ISYSROOT 1)
-set (CMAKE_C_COMPILER_ABI ELF)
-set (CMAKE_CXX_SIZEOF_DATA_PTR 4)
-set (CMAKE_CXX_HAS_ISYSROOT 1)
-set (CMAKE_CXX_COMPILER_ABI ELF)
-
-# Skip the platform compiler checks for cross compiling
-set (CMAKE_CXX_COMPILER_WORKS TRUE)
-set (CMAKE_C_COMPILER_WORKS TRUE)
-
-# Search for programs in the build host directories
-SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
-#   for libraries and headers in the target directories
-SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
-SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
-
-message (STATUS "iPhoneSimulator toolchain loaded")

platforms/ios/cmake/Toolchains/common-ios-toolchain.cmake

@@ -0,0 +1,137 @@
+# load settings in case of "try compile"
+set(TOOLCHAIN_CONFIG_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/toolchain.config.cmake")
+get_property(__IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE)
+if(__IN_TRY_COMPILE)
+  set(TOOLCHAIN_CONFIG_FILE "${CMAKE_CURRENT_SOURCE_DIR}/../toolchain.config.cmake")
+  if(NOT EXISTS "${TOOLCHAIN_CONFIG_FILE}")
+    # Hack for "try_compile" commands with other binary directory
+    set(TOOLCHAIN_CONFIG_FILE "${CMAKE_PLATFORM_INFO_DIR}/../toolchain.config.cmake")
+    if(NOT EXISTS "${TOOLCHAIN_CONFIG_FILE}")
+      message(FATAL_ERROR "Current CMake version (${CMAKE_VERSION}) is not supported")
+    endif()
+  endif()
+  include("${TOOLCHAIN_CONFIG_FILE}")
+  macro(toolchain_save_config)
+    # nothing
+  endmacro()
+else()
+  macro(toolchain_save_config)
+    set(__config "#message(\"Load TOOLCHAIN config...\")\n")
+    get_cmake_property(__variableNames VARIABLES)
+    set(__vars_list ${ARGN})
+    list(APPEND __vars_list
+        ${TOOLCHAIN_CONFIG_VARS}
+        CMAKE_SYSTEM_NAME
+        CMAKE_SYSTEM_VERSION
+        CMAKE_SYSTEM_PROCESSOR
+        CMAKE_C_COMPILER
+        CMAKE_CXX_COMPILER
+        CMAKE_C_FLAGS
+        CMAKE_CXX_FLAGS
+        CMAKE_SHARED_LINKER_FLAGS
+        CMAKE_MODULE_LINKER_FLAGS
+        CMAKE_EXE_LINKER_FLAGS
+        CMAKE_SKIP_RPATH
+        CMAKE_FIND_ROOT_PATH
+    )
+    foreach(__var ${__variableNames})
+      foreach(_v ${__vars_list})
+        if("x${__var}" STREQUAL "x${_v}")
+          if(${__var} MATCHES " ")
+            set(__config "${__config}set(${__var} \"${${__var}}\")\n")
+          else()
+            set(__config "${__config}set(${__var} ${${__var}})\n")
+          endif()
+        endif()
+      endforeach()
+    endforeach()
+    if(EXISTS "${TOOLCHAIN_CONFIG_FILE}")
+      file(READ "${TOOLCHAIN_CONFIG_FILE}" __config_old)
+    endif()
+    if("${__config_old}" STREQUAL "${__config}")
+      # nothing
+    else()
+      #message("Update TOOLCHAIN config: ${__config}")
+      file(WRITE "${TOOLCHAIN_CONFIG_FILE}" "${__config}")
+    endif()
+    unset(__config)
+    unset(__config_old)
+    unset(__vars_list)
+    unset(__variableNames)
+  endmacro()
+endif() # IN_TRY_COMPILE
+
+if(NOT DEFINED IOS_ARCH)
+  message(FATAL_ERROR "iOS toolchain requires ARCH option for proper configuration of compiler flags")
+endif()
+if(IOS_ARCH MATCHES "^arm64")
+  set(AARCH64 1)
+elseif(IOS_ARCH MATCHES "^armv")
+  set(ARM 1)
+elseif(IOS_ARCH MATCHES "^x86_64")
+  set(X86_64 1)
+elseif(IOS_ARCH MATCHES "^i386")
+  set(X86 1)
+else()
+  message(FATAL_ERROR "iOS toolchain doesn't recognize ARCH='${IOS_ARCH}' value")
+endif()
+
+if(NOT DEFINED CMAKE_OSX_SYSROOT)
+  if(IPHONEOS)
+    set(CMAKE_OSX_SYSROOT "iphoneos")
+  else()
+    set(CMAKE_OSX_SYSROOT "iphonesimulator")
+  endif()
+endif()
+set(CMAKE_MACOSX_BUNDLE YES)
+set(CMAKE_XCODE_ATTRIBUTE_CODE_SIGNING_REQUIRED "NO")
+
+set(CMAKE_OSX_ARCHITECTURES "${IOS_ARCH}" CACHE INTERNAL "Build architecture for iOS" FORCE)
+
+if(NOT __IN_TRY_COMPILE)
+  set(_xcodebuild_wrapper "${CMAKE_BINARY_DIR}/xcodebuild_wrapper")
+  if(NOT CMAKE_MAKE_PROGRAM STREQUAL _xcodebuild_wrapper)
+    set(_xcodebuild_wrapper_tmp "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/xcodebuild_wrapper")
+    file(WRITE "${_xcodebuild_wrapper_tmp}" "#!/bin/sh
+${CMAKE_MAKE_PROGRAM} IPHONEOS_DEPLOYMENT_TARGET=6.0 ARCHS=${IOS_ARCH} -sdk ${CMAKE_OSX_SYSROOT} \$*")
+    # Make executable
+    file(COPY "${_xcodebuild_wrapper_tmp}" DESTINATION ${CMAKE_BINARY_DIR} FILE_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
+    set(CMAKE_MAKE_PROGRAM "${_xcodebuild_wrapper}" CACHE INTERNAL "" FORCE)
+  endif()
+endif()
+
+# Standard settings
+set(CMAKE_SYSTEM_NAME iOS)
+set(CMAKE_SYSTEM_VERSION 6.0)
+set(CMAKE_SYSTEM_PROCESSOR "${IOS_ARCH}")
+# Include extra modules for the iOS platform files
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/platforms/ios/cmake/Modules")
+
+# Force the compilers to clang for iOS
+include(CMakeForceCompiler)
+#CMAKE_FORCE_C_COMPILER (clang GNU)
+#CMAKE_FORCE_CXX_COMPILER (clang++ GNU)
+
+if(AARCH64 OR X86_64)
+  set(CMAKE_C_SIZEOF_DATA_PTR 8)
+  set(CMAKE_CXX_SIZEOF_DATA_PTR 8)
+else()
+  set(CMAKE_C_SIZEOF_DATA_PTR 4)
+  set(CMAKE_CXX_SIZEOF_DATA_PTR 4)
+endif()
+set(CMAKE_C_HAS_ISYSROOT 1)
+set(CMAKE_CXX_HAS_ISYSROOT 1)
+set(CMAKE_C_COMPILER_ABI ELF)
+set(CMAKE_CXX_COMPILER_ABI ELF)
+
+# Skip the platform compiler checks for cross compiling
+set(CMAKE_CXX_COMPILER_WORKS TRUE)
+set(CMAKE_C_COMPILER_WORKS TRUE)
+
+# Search for programs in the build host directories
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
+#   for libraries and headers in the target directories
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+
+toolchain_save_config(IOS_ARCH)