libcxx[abi]: remove

This is a neat project, but offers no benefit to OpenWrt. The initial
reason for it was to be a replacement for libstdcpp as it is smaller
and lacks compatibility for C++98. Unfortunately, compiling several
packages with it results in larger ipk sizes.

While not a member of the packages feed, this will be moved to
packages-abandoned to keep it somewhere.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

config/Config-build.in

@@ -215,10 +215,6 @@ menu "Global build settings"
 		config USE_UCLIBCXX
 			bool "uClibc++"
 
-		config USE_LIBCXX
-			bool "libc++"
-			depends on !USE_UCLIBC
-
 		config USE_LIBSTDCXX
 			bool "libstdc++"
 	endchoice

include/uclibc++.mk

@@ -4,8 +4,8 @@ ifndef DUMP
   endif
 endif
 
-PKG_PREPARED_DEPENDS += CONFIG_USE_UCLIBCXX CONFIG_USE_LIBCXX
-CXX_DEPENDS = +USE_UCLIBCXX:uclibcxx +USE_LIBCXX:libcxx +USE_LIBSTDCXX:libstdcpp
+PKG_PREPARED_DEPENDS += CONFIG_USE_UCLIBCXX
+CXX_DEPENDS = +USE_UCLIBCXX:uclibcxx +USE_LIBSTDCXX:libstdcpp
 
 ifneq ($(CONFIG_USE_UCLIBCXX),)
  ifneq ($(CONFIG_CCACHE),)
@@ -14,11 +14,3 @@ ifneq ($(CONFIG_USE_UCLIBCXX),)
   TARGET_CXX=g++-uc
  endif
 endif
-
-ifneq ($(CONFIG_USE_LIBCXX),)
- ifneq ($(CONFIG_CCACHE),)
-  TARGET_CXX_NOCACHE=g++-libcxx
- else
-  TARGET_CXX=g++-libcxx
- endif
-endif

package/libs/libcxx/Makefile

-
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
-
-include $(TOPDIR)/rules.mk
-
-PKG_NAME:=libcxx
-PKG_VERSION:=10.0.0
-PKG_RELEASE:=1
-
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).src.tar.xz
-PKG_SOURCE_URL:=https://github.com/llvm/llvm-project/releases/download/llvmorg-$(PKG_VERSION)
-PKG_HASH:=270f8a3f176f1981b0f6ab8aa556720988872ec2b48ed3b605d0ced8d09156c7
-PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION).src
-
-PKG_MAINTAINER:=Rosen Penev <rosenp@gmail.com>
-PKG_LICENSE:=MIT
-PKG_LICENSE_FILES:=LICENSE.txt
-
-PKG_BUILD_PARALLEL:=1
-PKG_BUILD_DEPENDS:=libcxxabi
-CMAKE_BINARY_SUBDIR:=build
-
-include $(INCLUDE_DIR)/package.mk
-include $(INCLUDE_DIR)/cmake.mk
-
-define Package/libcxx
-  SECTION:=libs
-  CATEGORY:=Libraries
-  TITLE:=LLVM libstdc++
-  URL:=https://libcxx.llvm.org/
-  DEPENDS:=+libatomic +libpthread
-endef
-
-define Package/libcxx/description
-  libc++ is an implementation of the C++ standard library, targeting C++11, C++14 and above.
-endef
-
-CMAKE_OPTIONS += \
-	-DLIBCXX_CXX_ABI="libcxxabi" \
-	-DLIBCXX_ENABLE_ASSERTIONS=OFF \
-	-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF \
-	-DLIBCXX_INCLUDE_BENCHMARKS=OFF \
-	-DLIBCXX_INCLUDE_DOCS=OFF \
-	-DLIBCXX_INCLUDE_TESTS=OFF \
-	-DLIBCXX_LIBDIR_SUFFIX="" \
-	-DLIBCXX_STANDALONE_BUILD=ON \
-	-DLIBCXX_HAS_MUSL_LIBC=$(if $(CONFIG_USE_MUSL),ON,OFF)
-
-TARGET_CXXFLAGS += -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -Wno-attributes -flto
-TARGET_LDFLAGS += -Wl,--gc-sections,--as-needed
-
-define Build/InstallDev
-	$(call Build/InstallDev/cmake,$(1))
-	$(CP) files/g++-libcxx	$(TOOLCHAIN_DIR)/bin/
-	$(SED) 's,CXX,$(TARGET_CXX),g' $(TOOLCHAIN_DIR)/bin/g++-libcxx
-endef
-
-define Package/libcxx/install
-	$(INSTALL_DIR)					$(1)/usr/lib
-	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libc++.so.*	$(1)/usr/lib/
-endef
-
-$(eval $(call BuildPackage,libcxx))

package/libs/libcxx/files/g++-libcxx

-#!/bin/sh
-
-WRAPPER_INCLUDEDIR="-I$STAGING_DIR/usr/include/c++/v1"
-WRAPPER_LIBDIR="-L$STAGING_DIR/usr/lib"
-WRAPPER_LIBS="-lc -lgcc_s -lssp_nonshared"
-
-WRAPPER_OPTIONS=""
-WRAPPER_INCLIB="Y"
-for arg
-do
-	case "$arg" in
-	-c|-E|-S) WRAPPER_INCLIB="N" ;;
-	-static) [ "$WRAPPER_LIBS" != "-lc -lgcc_s -lssp_nonshared -lgcc_eh" ] && WRAPPER_LIBS="-lc -lgcc_s -lssp_nonshared -lgcc_eh" ;;
-	esac
-done
-[ "$WRAPPER_INCLIB" = "Y" ] && WRAPPER_OPTIONS="-nodefaultlibs $WRAPPER_LIBDIR -lc++ -lc++abi $WRAPPER_LIBS"
-
-exec CXX -nostdinc++ -DGCC_HASCLASSVISIBILITY "$WRAPPER_INCLUDEDIR" "$@" $WRAPPER_OPTIONS
-

package/libs/libcxx/patches/010-ssp.patch

---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -760,6 +760,10 @@ function(cxx_link_system_libraries targe
-     target_link_libraries(${target} PRIVATE atomic)
-   endif()
- 
-+  if (LIBCXX_HAS_MUSL_LIBC)
-+    target_link_libraries(${target} PRIVATE ssp_nonshared)
-+  endif()
-+
-   if (MINGW)
-     target_link_libraries(${target} PRIVATE "${MINGW_LIBRARIES}")
-   endif()

package/libs/libcxxabi/Makefile

-
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
-
-include $(TOPDIR)/rules.mk
-
-PKG_NAME:=libcxxabi
-PKG_VERSION:=10.0.0
-PKG_RELEASE:=1
-
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).src.tar.xz
-PKG_SOURCE_URL:=https://github.com/llvm/llvm-project/releases/download/llvmorg-$(PKG_VERSION)
-PKG_HASH:=e71bac75a88c9dde455ad3f2a2b449bf745eafd41d2d8432253b2964e0ca14e1
-PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION).src
-
-PKG_MAINTAINER:=Rosen Penev <rosenp@gmail.com>
-PKG_LICENSE:=MIT
-PKG_LICENSE_FILES:=LICENSE.txt
-
-PKG_BUILD_PARALLEL:=1
-CMAKE_BINARY_SUBDIR:=build
-
-include $(INCLUDE_DIR)/package.mk
-include $(INCLUDE_DIR)/cmake.mk
-
-define Package/libcxxabi
-  SECTION:=libs
-  CATEGORY:=Libraries
-  TITLE:=LLVM lib++abi
-  URL:=https://libcxxabi.llvm.org/
-  DEPENDS:=+libpthread
-  BUILDONLY:=1
-endef
-
-define Package/libcxxabi/description
-  libc++abi is a new implementation of low level support for a standard C++ library.
-endef
-
-CMAKE_OPTIONS += \
-	-DLIBCXXABI_ENABLE_EXCEPTIONS=ON \
-	-DLIBCXXABI_ENABLE_PEDANTIC=OFF \
-	-DLIBCXXABI_ENABLE_PIC=ON \
-	-DLIBCXXABI_ENABLE_WERROR=OFF \
-	-DLIBCXXABI_USE_LLVM_UNWINDER=OFF \
-	-DLIBCXXABI_USE_COMPILER_RT=OFF \
-	-DLIBCXXABI_ENABLE_THREADS=ON \
-	-DLIBCXXABI_HAS_PTHREAD_API=ON \
-	-DLIBCXXABI_INCLUDE_TESTS=OFF \
-	-DLIBCXXABI_LIBDIR_SUFFIX="" \
-	-DLIBCXXABI_INSTALL_LIBRARY=ON \
-	-DLIBCXXABI_ENABLE_SHARED=OFF \
-	-DLIBCXXABI_LIBCXX_SRC_DIR=$(BUILD_DIR)/libcxx-$(PKG_VERSION).src \
-	-DLIBCXXABI_LIBCXX_INCLUDES=$(BUILD_DIR)/libcxx-$(PKG_VERSION).src/include
-
-TARGET_CXXFLAGS += -flto
-TARGET_LDFLAGS += -Wl,--gc-sections,--as-needed
-
-define Build/Prepare
-	$(MAKE) -C $(TOPDIR)/package/libs/libcxx prepare
-	$(call Build/Prepare/Default)
-endef
-
-define Build/InstallDev
-	$(call Build/InstallDev/cmake,$(1))
-	$(INSTALL_DIR) $(1)/usr/include/
-	$(INSTALL_DATA) $(PKG_BUILD_DIR)/include/*.h $(1)/usr/include/
-endef
-
-$(eval $(call BuildPackage,libcxxabi))

package/libs/libcxxabi/patches/010-arm.patch

---- a/src/cxa_exception.h
-+++ b/src/cxa_exception.h
-@@ -27,6 +27,13 @@ _LIBCXXABI_HIDDEN uint64_t __getExceptio
- _LIBCXXABI_HIDDEN void     __setExceptionClass  (      _Unwind_Exception*, uint64_t);
- _LIBCXXABI_HIDDEN bool     __isOurExceptionClass(const _Unwind_Exception*);
- 
-+#if defined(__arm__) && defined(__GNUC__)
-+// missing values from _Unwind_Reason_Code enum
-+#define _URC_FATAL_PHASE2_ERROR ((_Unwind_Reason_Code)2)
-+#define _URC_FATAL_PHASE1_ERROR ((_Unwind_Reason_Code)3)
-+#define _URC_NORMAL_STOP ((_Unwind_Reason_Code)4)
-+#endif
-+
- struct _LIBCXXABI_HIDDEN __cxa_exception {
- #if defined(__LP64__) || defined(_WIN64) || defined(_LIBCXXABI_ARM_EHABI)
-     // Now _Unwind_Exception is marked with __attribute__((aligned)),
---- a/src/cxa_personality.cpp
-+++ b/src/cxa_personality.cpp
-@@ -1108,7 +1108,7 @@ __gxx_personality_v0(_Unwind_State state
- 
-     // Check the undocumented force unwinding behavior
-     bool is_force_unwinding = state & _US_FORCE_UNWIND;
--    state &= ~_US_FORCE_UNWIND;
-+    state = (_Unwind_State)(state & ~_US_FORCE_UNWIND);
- 
-     scan_results results;
-     switch (state) {