# Flutter includes a vender copy of clang which is mandatory to use for
# compiling. These are the supported architectures.
config BR2_PACKAGE_FLUTTER_ENGINE_ARCH_SUPPORTS
	bool
	default y if BR2_aarch64
	default y if BR2_arm && !BR2_ARM_CPU_ARMV4 && !BR2_ARM_CPU_ARMV5
	default y if BR2_x86_64

config BR2_PACKAGE_FLUTTER_ENGINE
	bool "flutter-engine"
	depends on BR2_PACKAGE_FLUTTER_ENGINE_ARCH_SUPPORTS
	depends on BR2_TOOLCHAIN_USES_GLIBC
	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_5
	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL # pthreads
	depends on BR2_INSTALL_LIBSTDCPP
	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # std::shared_future
	depends on !BR2_STATIC_LIBS
	depends on BR2_USE_WCHAR # std::wstring
	depends on BR2_HOST_GCC_AT_LEAST_5
	depends on BR2_PACKAGE_HAS_LIBGL || BR2_PACKAGE_HAS_LIBGLES
	select BR2_PACKAGE_FREETYPE
	select BR2_PACKAGE_HOST_DEPOT_TOOLS
	select BR2_PACKAGE_ZLIB
	help
	  Flutter is Google's SDK for crafting beautiful, fast user
	  experience for mobile, web, and desktop from a single
	  codebase. Flutter works with existing code, is used by
	  developers and organizations around the world, and is
	  free and open source.

	  The Flutter Engine is a portable runtime for hosting
	  Flutter applications. It implements Flutter's core
	  libraries, including animation and graphics, file and
	  network I/O, accessibility support, plugin architecture,
	  and a Dart runtime and compile toolchain. Most developers
	  will interact with Flutter via the Flutter Framework,
	  which provides a modern, reactive framework, and a rich
	  set of platform, layout and foundation widgets.

	  https://github.com/flutter/engine

comment "flutter-engine needs an OpenGL or OpenGLES backend"
	depends on BR2_PACKAGE_FLUTTER_ENGINE_ARCH_SUPPORTS
	depends on !BR2_PACKAGE_HAS_LIBGL && !BR2_PACKAGE_HAS_LIBGLES

comment "flutter-engine needs a glibc toolchain w/ wchar, C++, gcc >= 5, dynamic library, host gcc >= 5, NPTL"
	depends on BR2_PACKAGE_FLUTTER_ENGINE_ARCH_SUPPORTS
	depends on !BR2_TOOLCHAIN_USES_GLIBC || !BR2_TOOLCHAIN_HAS_THREADS_NPTL \
		|| !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_5 \
		|| BR2_STATIC_LIBS || !BR2_USE_WCHAR \
		|| !BR2_HOST_GCC_AT_LEAST_5

comment "flutter-engine needs a toolchain not affected by GCC bug 64735"
	depends on BR2_PACKAGE_FLUTTER_ENGINE_ARCH_SUPPORTS
	depends on BR2_TOOLCHAIN_HAS_GCC_BUG_64735