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authorRosen Penev <rosenp@gmail.com>2019-12-13 21:07:04 -0800
committerHauke Mehrtens <hauke@hauke-m.de>2019-12-23 00:22:07 +0100
commit856ea2bad3b3eac565215c0ac79f37a4ba4cd5b7 (patch)
tree04e6563e9656f70225650876f95238b9554df856 /package/libs/libcxx
parentfd211e1677fc653feeef6b0b8b8e8659ac274b3c (diff)
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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>
Diffstat (limited to 'package/libs/libcxx')
-rw-r--r--package/libs/libcxx/Makefile62
-rwxr-xr-xpackage/libs/libcxx/files/g++-libcxx19
2 files changed, 81 insertions, 0 deletions
diff --git a/package/libs/libcxx/Makefile b/package/libs/libcxx/Makefile
new file mode 100644
index 0000000000..c1fa1d6b07
--- /dev/null
+++ b/package/libs/libcxx/Makefile
@@ -0,0 +1,62 @@
+#
+# 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 $(call BuildPackage,libcxx))
diff --git a/package/libs/libcxx/files/g++-libcxx b/package/libs/libcxx/files/g++-libcxx
new file mode 100755
index 0000000000..81ca46eb0e
--- /dev/null
+++ b/package/libs/libcxx/files/g++-libcxx
@@ -0,0 +1,19 @@
+#!/bin/sh
+
+WRAPPER_INCLUDEDIR="-I$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++ -lsupc++ $WRAPPER_LIBS"
+
+exec CXX -fno-builtin -nostdinc++ -DGCC_HASCLASSVISIBILITY "$WRAPPER_INCLUDEDIR" "$@" $WRAPPER_OPTIONS
+