openwrt/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:=9.0.1
PKG_RELEASE:=1

PKG_SOURCE_PROTO:=git
PKG_SOURCE_URL:=https://git.llvm.org/git/libcxx
PKG_SOURCE_VERSION:=2076f539f410805ef88692b9c0ce0a0b882a7680
PKG_MIRROR_HASH:=6dff036660d478bfaa14e407fc5de26d22da1087118c897b1a3ad2e90cb7bf39

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/libcxx
  SECTION:=libs
  CATEGORY:=Libraries
  TITLE:=LLVM libstdc++
  URL:=https://libcxx.llvm.org/
  DEPENDS:=+libatomic +libpthread
endef

define Package/libcxx/description
  LLVM C++ library targeting C++11 and above
endef

CMAKE_OPTIONS += \
	-DLIBCXX_ENABLE_ASSERTIONS=OFF \
	-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF \
	-DLIBCXX_INCLUDE_BENCHMARKS=OFF \
	-DLIBCXX_INCLUDE_DOCS=OFF \
	-DLIBCXX_INCLUDE_TESTS=OFF \
	-DLIBCXX_HAS_MUSL_LIBC=ON \
	-DLIBCXX_STANDALONE_BUILD=ON

TARGET_CXXFLAGS += -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -Wno-attributes -flto
TARGET_LDFLAGS += -Wl,--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))
libcxx: Add package Currently in OpenWrt, there are two libc++: libstdcpp and uClibc++. The former is huge and the latter supports only C++98 with some basic support for C++11. Those C++ versions seem to be specific to the compiler version libcxx supports C++11 and above while being much smaller than libstdcpp. On mt7621, these are the sizes of the ipks that I get: libstdcpp: 460786 libcxx: 182881 uClibc++:67720 libcxx is faster than uClibc++ and is under active development as part of the LLVM project while uClibc++ is effectively dead. This PR modifies uclibc++.mk to expose the make menuconfig option. Further cleanup is beyond the scope of this PR. What that means is, this is not used by default. A g++-libcxx wrapper based on the uClibc++ one was added. Works the same way. Compile tested with all packages that use uclibc++.mk in their Makefiles under mipsel_24kc. kismet fails compilation but that package needs to be cleaned up and updated. Runtime tested with gddrescue, gdisk, dcwapd, bonnie++, and aircrack-ng on a TP-Link Archer C7v2. Signed-off-by: Rosen Penev <rosenp@gmail.com> 2019-12-14 05:07:04 +00:00			`#`
			`# 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:=9.0.1`
			`PKG_RELEASE:=1`

			`PKG_SOURCE_PROTO:=git`
			`PKG_SOURCE_URL:=https://git.llvm.org/git/libcxx`
			`PKG_SOURCE_VERSION:=2076f539f410805ef88692b9c0ce0a0b882a7680`
			`PKG_MIRROR_HASH:=6dff036660d478bfaa14e407fc5de26d22da1087118c897b1a3ad2e90cb7bf39`

			`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/libcxx`
			`SECTION:=libs`
			`CATEGORY:=Libraries`
			`TITLE:=LLVM libstdc++`
			`URL:=https://libcxx.llvm.org/`
			`DEPENDS:=+libatomic +libpthread`
			`endef`

			`define Package/libcxx/description`
			`LLVM C++ library targeting C++11 and above`
			`endef`

			`CMAKE_OPTIONS += \`
			`-DLIBCXX_ENABLE_ASSERTIONS=OFF \`
			`-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF \`
			`-DLIBCXX_INCLUDE_BENCHMARKS=OFF \`
			`-DLIBCXX_INCLUDE_DOCS=OFF \`
			`-DLIBCXX_INCLUDE_TESTS=OFF \`
			`-DLIBCXX_HAS_MUSL_LIBC=ON \`
			`-DLIBCXX_STANDALONE_BUILD=ON`

			`TARGET_CXXFLAGS += -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -Wno-attributes -flto`
			`TARGET_LDFLAGS += -Wl,--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))`