669a0f5bec
This commit reworks the C++ standard library configurations such that: * the separation between the Zephyr minimal C++ library and the fully featured C++ standard libraries, such as GNU libstdc++, is clear. This is done by deprecating the Kconfig `CONFIG_LIB_CPLUSPLUS` symbol, which implies that the minimal C++ library is selected when set to `n`, and introducing the `CONFIG_MINIMAL_LIBCPP` symbol. * the type of the selected C++ standard library is clear. This is done by introducing a Kconfig choice, `LIBCPP_IMPLEMENTATION`, for the C++ standard library type and providing the choice symbols for each library type supported, such as `CONFIG_MINIMAL_LIBCPP` and `CONFIG_GLIBCXX_LIBCPP`. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
147 lines
3.5 KiB
Plaintext
147 lines
3.5 KiB
Plaintext
# C++ configuration options
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# Copyright (c) 2018 B. Leforestier
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# SPDX-License-Identifier: Apache-2.0
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menu "C++ Language Support"
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config CPP
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bool "C++ support for the application"
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help
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This option enables the use of applications built with C++.
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if CPP
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choice
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prompt "C++ Standard"
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default STD_CPP11
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help
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C++ Standards.
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config STD_CPP98
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bool "C++ 98"
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help
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1998 C++ standard as modified by the 2003 technical corrigendum
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and some later defect reports.
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config STD_CPP11
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bool "C++ 11"
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help
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2011 C++ standard, previously known as C++0x.
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config STD_CPP14
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bool "C++ 14"
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help
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2014 C++ standard.
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config STD_CPP17
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bool "C++ 17"
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help
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2017 C++ standard, previously known as C++0x.
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config STD_CPP2A
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bool "C++ 2a"
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help
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Next revision of the C++ standard, which is expected to be published in 2020.
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config STD_CPP20
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bool "C++ 20"
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help
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2020 C++ standard, previously known as C++2A.
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config STD_CPP2B
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bool "C++ 2b"
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help
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Next revision of the C++ standard, which is expected to be published in 2023.
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endchoice
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config REQUIRES_FULL_LIBCPP
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bool
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select REQUIRES_FULL_LIBC
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help
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Helper symbol to indicate that a full C++ standard library
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implementation is required.
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Select this from a symbol that enables a feature requiring a full
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C++ standard library implementation.
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choice LIBCPP_IMPLEMENTATION
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prompt "C++ Standard Library Implementation"
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default EXTERNAL_LIBCPP if REQUIRES_FULL_LIBCPP && NATIVE_APPLICATION
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default GLIBCXX_LIBCPP if REQUIRES_FULL_LIBCPP
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default MINIMAL_LIBCPP
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config MINIMAL_LIBCPP
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bool "Minimal C++ Library"
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depends on !REQUIRES_FULL_LIBCPP
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help
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Build with the minimal C++ library provided by Zephyr.
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The Zephyr minimal C++ library only provides a very limited subset
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of the standard C++ library and is mainly intended for use with the
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applications that do not require the Standard Template Library (STL).
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config GLIBCXX_LIBCPP
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bool "GNU C++ Standard Library"
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depends on !NATIVE_APPLICATION
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depends on NEWLIB_LIBC || (PICOLIBC && !PICOLIBC_USE_MODULE)
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help
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Build with GNU C++ Standard Library (libstdc++) provided by the GNU
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Compiler Collection (GCC)-based toolchain.
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config ARCMWDT_LIBCPP
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bool "ARC MWDT C++ Library"
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depends on !NATIVE_APPLICATION
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depends on ARCMWDT_LIBC
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help
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Build with ARC MetaWare C++ Standard Library provided by the ARC
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MetaWare Development Tools (MWDT) toolchain.
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config EXTERNAL_LIBCPP
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bool "External C++ standard library"
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help
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Build with an external/user-provided C++ standard library.
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endchoice # LIBCPP_IMPLEMENTATION
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config CPP_MAIN
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bool "C++ main() function definition"
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help
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This option instructs the Zephyr kernel to call the 'int main(void)'
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instead of the 'void main(void)', which is the default main() type
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for Zephyr.
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C++ does not allow the main() to be defined with 'void' return type,
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and any applications defining its main() in a C++ source file must
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enable this option.
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if !MINIMAL_LIBCPP
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config CPP_EXCEPTIONS
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bool "C++ exceptions support"
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depends on !NEWLIB_LIBC_NANO
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help
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This option enables support of C++ exceptions.
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config CPP_RTTI
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bool "C++ RTTI support"
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help
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This option enables support of C++ RTTI.
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endif # !MINIMAL_LIBCPP
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config CPP_STATIC_INIT_GNU
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# As of today only ARC MWDT toolchain doesn't support GNU-compatible
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# initialization of CPP static objects, new toolchains can be added
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# here if required.
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def_bool "$(ZEPHYR_TOOLCHAIN_VARIANT)" != "arcmwdt"
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help
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GNU-compatible initialization of CPP static objects
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endif # CPP
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rsource "Kconfig.deprecated"
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endmenu
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