# C++ configuration options

# Copyright (c) 2018 B. Leforestier
# SPDX-License-Identifier: Apache-2.0

menu "C++ Language Support"

config CPP
	bool "C++ support for the application"
	help
	  This option enables the use of applications built with C++.

if CPP

choice STD_CPP
	prompt "C++ Standard"
	default STD_CPP11
	help
	  C++ Standards.

config STD_CPP98
	bool "C++ 98"
	help
	  1998 C++ standard as modified by the 2003 technical corrigendum
	  and some later defect reports.

config STD_CPP11
	bool "C++ 11"
	help
	  2011 C++ standard, previously known as C++0x.

config STD_CPP14
	bool "C++ 14"
	help
	  2014 C++ standard.

config STD_CPP17
	bool "C++ 17"
	help
	  2017 C++ standard, previously known as C++0x.

config STD_CPP2A
	bool "C++ 2a"
	help
	  Next revision of the C++ standard, which is expected to be published in 2020.

config STD_CPP20
	bool "C++ 20"
	help
	  2020 C++ standard, previously known as C++2A.

config STD_CPP2B
	bool "C++ 2b"
	help
	  Next revision of the C++ standard, which is expected to be published in 2023.

endchoice

config REQUIRES_FULL_LIBCPP
	bool "Require complete C++ standard library"
	select REQUIRES_FULL_LIBC
	help
	  Indicates that a full C++ standard library is required, either by
	  a subsystem or an application. This will also include a full C
	  library implementation.

config FULL_LIBCPP_SUPPORTED
	bool
	help
	  Selected when the target has at least one C++ library that offers a
	  complete implementation and which would be selected when
	  REQUIRES_FULL_LIBCPP is set.

choice LIBCPP_IMPLEMENTATION
	prompt "C++ Standard Library Implementation"
	default EXTERNAL_LIBCPP if REQUIRES_FULL_LIBCPP && NATIVE_BUILD
	default LIBCXX_LIBCPP if REQUIRES_FULL_LIBCPP && "$(ZEPHYR_TOOLCHAIN_VARIANT)" = "llvm"
	default GLIBCXX_LIBCPP if REQUIRES_FULL_LIBCPP
	default MINIMAL_LIBCPP

config MINIMAL_LIBCPP
	bool "Minimal C++ Library"
	depends on !REQUIRES_FULL_LIBCPP
	help
	  Build with the minimal C++ library provided by Zephyr.

	  The Zephyr minimal C++ library only provides a very limited subset
	  of the standard C++ library and is mainly intended for use with the
	  applications that do not require the Standard Template Library (STL).

config GLIBCXX_LIBCPP
	bool "GNU C++ Standard Library"
	depends on !NATIVE_APPLICATION
	depends on NEWLIB_LIBC || PICOLIBC
	select FULL_LIBCPP_SUPPORTED
	help
	  Build with GNU C++ Standard Library (libstdc++) provided by the GNU
	  Compiler Collection (GCC)-based toolchain.

config LIBCXX_LIBCPP
	bool "LLVM C++ Standard Library"
	depends on !NATIVE_APPLICATION
	depends on NEWLIB_LIBC
	depends on "$(ZEPHYR_TOOLCHAIN_VARIANT)" = "llvm"
	select FULL_LIBCPP_SUPPORTED
	help
	  Build with LLVM C++ Standard Library (libc++) provided by LLVM
	  toolchain. Information about library can be found at
	  https://libcxx.llvm.org

config ARCMWDT_LIBCPP
	bool "ARC MWDT C++ Library"
	depends on !NATIVE_APPLICATION
	depends on ARCMWDT_LIBC
	help
	  Build with ARC MetaWare C++ Standard Library provided by the ARC
	  MetaWare Development Tools (MWDT) toolchain.

config EXTERNAL_LIBCPP
	bool "External C++ standard library"
	help
	  Build and link with an external/user-provided C++ standard library.

config EXTERNAL_MODULE_LIBCPP
	bool "External C++ standard library module"
	help
	  Build an external/user-provided C++ standard library.

endchoice # LIBCPP_IMPLEMENTATION

config CPP_MAIN
	bool "[DEPRECATED] C++ main() function definition"
	select DEPRECATED
	help
	  This option used to be necessary to instruct the Zephyr kernel to
	  call 'int main(void)' instead of the old Zephyr default, 'void
	  main(void)'.

	  As the Zephyr type now matches the C++ required type, this option
	  is no longer necessary.

if !MINIMAL_LIBCPP

config CPP_EXCEPTIONS
	bool "C++ exceptions support"
	depends on !NEWLIB_LIBC_NANO
	help
	  This option enables support of C++ exceptions.

config CPP_RTTI
	bool "C++ RTTI support"
	help
	  This option enables support of C++ RTTI.

endif # !MINIMAL_LIBCPP

config CPP_STATIC_INIT_GNU
	# As of today only ARC MWDT toolchain doesn't support GNU-compatible
	# initialization of CPP static objects, new toolchains can be added
	# here if required.
	def_bool "$(ZEPHYR_TOOLCHAIN_VARIANT)" != "arcmwdt"
	help
	  GNU-compatible initialization of CPP static objects

endif # CPP

rsource "Kconfig.deprecated"

endmenu