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libc:libxx: add new low level c++ standard library support

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LLVM libc++abi is a new implementation of low level support for
a standard C++ library.

Change-Id: Ica9c81bd96fd27b169a06e352b0c394d47aed5b6
This commit is contained in:
zhuyanlin 2021-08-19 17:11:50 +08:00 committed by Xiang Xiao
parent bcce3314e5
commit 7f48d13c47
4 changed files with 79 additions and 7 deletions
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2
libs/libxx/.gitignore vendored
View file

@ -1,3 +1,5 @@
/uClibc++
/libcxx
/libcxxabi
/libcxx-*.src.tar.xz
/libcxxabi-*.src.tar.xz

26
libs/libxx/Kconfig
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@ -50,6 +50,25 @@ config UCLIBCXX
endchoice
choice
prompt "C++ low level library select"
default CXX_LIBSUPCXX
config LIBCXXABI
bool "LLVM low level C++ Library"
---help---
LLVM "libc++abi" C++ Standard Library
https://libcxxabi.llvm.org/
Select if your use libc++abi as lower level c++ library
config CXX_LIBSUPCXX
bool "GNU low level libsupc++"
---help---
Select if your toolchain provides libsupc++ and use libsupc++ as lower
level c++ library.
endchoice
config HAVE_CXXINITIALIZE
bool "Have C++ initialization"
default LIBCXX || UCLIBCXX
@ -62,13 +81,6 @@ config CXX_EXCEPTION
bool "Enable Exception Support"
default LIBCXX || UCLIBCXX
config CXX_LIBSUPCXX
bool "Have libsupc++ (required)"
default LIBCXX || UCLIBCXX
---help---
Select if your toolchain provides libsupc++. This option is required
at present because the built-in libsupc++ support is incomplete.
if UCLIBCXX
config UCLIBCXX_BUFSIZE

4
libs/libxx/Makefile
View file

@ -45,6 +45,10 @@ else
include cxx.defs
endif
ifeq ($(CONFIG_LIBCXXABI),y)
include libcxxabi.defs
endif
# Object Files
AOBJS = $(ASRCS:.S=$(OBJEXT))

54
libs/libxx/libcxxabi.defs Normal file
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@ -0,0 +1,54 @@
############################################################################
# libs/libxx/libcxxabi.defs
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership. The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
###########################################################################
VERSION=12.0.0
libcxxabi-$(VERSION).src.tar.xz:
$(Q) curl -O -L https://github.com/llvm/llvm-project/releases/download/llvmorg-$(VERSION)/libcxxabi-$(VERSION).src.tar.xz
libcxxabi: libcxxabi-$(VERSION).src.tar.xz
$(Q) tar -xf libcxxabi-$(VERSION).src.tar.xz
$(Q) mv libcxxabi-$(VERSION).src libcxxabi
$(Q) touch $@
distclean::
$(Q) $(DELFILE) libcxxabi-$(VERSION).src.tar.xz
$(call DELDIR, libcxxabi)
context:: libcxxabi
# C++ABI files
CPPSRCS += cxa_aux_runtime.cpp cxa_default_handlers.cpp cxa_demangle.cpp cxa_exception_storage.cpp
CPPSRCS += cxa_guard.cpp cxa_handlers.cpp cxa_thread_atexit.cpp cxa_vector.cpp cxa_virtual.cpp
# C++ STL files
CPPSRCS += stdlib_exception.cpp stdlib_new_delete.cpp stdlib_stdexcept.cpp stdlib_typeinfo.cpp
# Internal files
CPPSRCS += abort_message.cpp fallback_malloc.cpp private_typeinfo.cpp
ifeq ($(CONFIG_CXX_EXCEPTION), y)
CXXFLAGS += ${shell $(DEFINE) "$(CC)" LIBCXXABI_ENABLE_EXCEPTIONS}
CPPSRCS += cxa_exception.cpp cxa_personality.cpp
else
CPPSRCS += cxa_noexception.cpp
endif
DEPPATH += --dep-path libcxxabi/src
VPATH += libcxxabi/src