reinit the tree, so we can have metadata

author: V3n3RiX <venerix@redcorelinux.org> 2017-10-09 18:53:29 +0100
committer: V3n3RiX <venerix@redcorelinux.org> 2017-10-09 18:53:29 +0100
commit: 4f2d7949f03e1c198bc888f2d05f421d35c57e21 (patch)
tree: ba5f07bf3f9d22d82e54a462313f5d244036c768 /sys-libs/libcxx
15 files changed, 1925 insertions, 0 deletions
diff --git a/sys-libs/libcxx/Manifest b/sys-libs/libcxx/Manifest
new file mode 100644
index 000000000000..70d2cbfbb407
--- /dev/null
+++ b/sys-libs/libcxx/Manifest
@@ -0,0 +1,22 @@
+AUX Makefile 874 SHA256 ba99d3b7b98ed88a64f8370ba2d90e245f8e5ea9bfe302382ef8eeded0ec00b4 SHA512 96eef2e897075bc7d9fc799ce6c54f6a33ee917efd5666376ac578cb16e15d965205630dbd076f92a3a7091d58ecc235e37bc327c211bf3594244981f089135f WHIRLPOOL 0680b69fdc46c0d6fac01fc2fa0b93ff62d167a03b3ce1cc80fbe57ff04356f5ab4e71f0daec517e629697d5e34f295b66e8263f7506eaa347a500b27442933d
+AUX libcxx-3.8.1-musl-support.patch 442 SHA256 2f0127c39e96b27e46b4c769cfee3e0e88ed75ac27280275d76275b7dcf2d2bf SHA512 7b2568cbf3afcf2bcd33c3c8db2c24ed75f542081bcb5a7defdc9a4a39a750bbb4106ab7bce09864f146f7710b224802d9e3cc3ced8bb937d0ff6af7a6549e80 WHIRLPOOL f6fbad0ed76fa6118139bd35ce4d0c29cd2c6a02554049af53d353345d4d79be9a76165f05d45ea826f518eda031b06072f20d7896c43033c23ae21006ece930
+AUX libcxx-3.9-cmake-link-flags.patch 1014 SHA256 2a67d309f5aa802a8cb3d7fe76dff0a9c797e88a63f43fda758f9626afc8d4d0 SHA512 5df85c66bf865900197effe3905976bf165b4c4d79b8d14352753f6baca93ab5dc26bf735fd9478a0c13df489b860d8b629240134b7e26be6233138ea95dbab3 WHIRLPOOL b99590b6a0e1f4c0738d6bf95b4b379685a5ca5a32370938928656481234e22cf1acc788075a6af331406a70c8d8b0f81111ad392454df72ef58181d07d76d56
+AUX libcxx-3.9-cmake-static-lib.patch 7507 SHA256 f4c829b4eb930949571323b13ab67c4e9764d8dbfb245d1318f1cf30627d101e SHA512 435c14edfb7bca9ef35fa1e9e44ab9655d5b47e373e6437839027b6d56894a37dfb0f228cce062d84aaaf60677d9435b2cdee2c9248b4f25cf3f6890ec353f46 WHIRLPOOL 0ae4d12869d233fa549fd65f673729d60f1e34d400e7b02cb433b61ae5ff03efbdc321aa33314fe56caa3d78275e2f629eb6d47db5237f0e234b50161a29d423
+AUX prepare_snapshot.sh 427 SHA256 9ebf22257a2e296dee41a56b0a721cd1ba459c620009ca8422ba812515ff726f SHA512 ebac2a467f8b1dfb68f1dc46a35f8294d1cf74b70be2a008217fa13b3366ddf4a9f2ebbe611cd63824f42305c5c0304aac2f46386b2956c9e07d82d5d984b435 WHIRLPOOL 232a60d6a22f50c424ec9cf6f325bbb4e8e96815ba9dffdad0a5b1b872b19d20126d316ced71956978eb5ce098f72584d21104c14e232330b3893a73e4c3c358
+DIST libcxx-3.7.1.src.tar.xz 995724 SHA256 357fbd4288ce99733ba06ae2bec6f503413d258aeebaab8b6a791201e6f7f144 SHA512 08d2399a8b36aa15290733256c896c9fa43f1a1223bc5c73bbcd014fddf8880e514d2a6dcc456bcf18b537c01fb6911b092e6d9958bccd8e64e9f375ed7a1ab9 WHIRLPOOL 19f77946abf48cbdd3e7ea21fd009ca3cc5f607dfe0512a44b102847044bb1d5ae4b16f503f18b14ebd9ea115256e87af07409907ba2a65f6061e217a502a359
+DIST libcxx-3.8.1.src.tar.xz 1074164 SHA256 77d7f3784c88096d785bd705fa1bab7031ce184cd91ba8a7008abf55264eeecc SHA512 782ff3cdb85d02e92404e943474d0266ff601725c202f0667d60e7807f1ba3cfdebbdb062e27a52fec96be1c99339044be93a88ba7e396682f98d99c9ac175b2 WHIRLPOOL a729c44060972edee79b0019fd4c6c23fa56dd625e564f4c5965682d9fc79be4094df0643f67c5d2ffa3ae3c743c892c3c9ba19719b2307aada35775f64ed104
+DIST libcxx-3.9.0.src.tar.xz 1198308 SHA256 d0b38d51365c6322f5666a2a8105785f2e114430858de4c25a86b49f227f5b06 SHA512 55d5c4adff378ee02b0b99d732bc9f326910f9e49ab8c320a588eccdd0362fe009bc9a6a4337d29faf6338420c91b10d0d7d67f66128268f01258d30502c4f4a WHIRLPOOL 3ee3519acfe95287a862a6c44e30ed52ced1204332913007797da4e4da40dfdc5991ae120f5686827cc208b559936da5bc5485dab75617bdd5cbbd9e95a6032a
+DIST libcxx-3.9.1.src.tar.xz 1209020 SHA256 25e615e428f60e651ed09ffd79e563864e3f4bc69a9e93ee41505c419d1a7461 SHA512 a5976e4096624a7307b3e43f4a22ac2dc74572226e0f57af9f3ef537a14c3cff1601b7042aef9dc40a0ee53ca76b08d72eb9c253dcf34f115d3153c302db7070 WHIRLPOOL cad439979570192b195338d752a24fb0ad8704c0c8efed3b6d7724437763eab7bc3b8baaf2f0e6fff55c6d9be211dff6f7baf18dec55e3a29ad3b8a423cefb1e
+DIST libcxx-4.0.1.src.tar.xz 1446380 SHA256 520a1171f272c9ff82f324d5d89accadcec9bc9f3c78de11f5575cdb99accc4c SHA512 91f3f397be606989be99865d0b279557f9afb93f7a74ed10c3a74f4440e38b5694ddf452bbf2f487cacd4391606dd5c7edfe5130f2de19e2acfd6cce619d028a WHIRLPOOL fe7c71e8dc2d17d14e94896837229c5ed872e7c04aea79a207e8fa98aa4539a7445e402b848d0c0d009f154f00d970159ad009d16bfdb9ae012ce5c7c6d9ba51
+DIST libcxx-5.0.0.src.tar.xz 1518940 SHA256 eae5981e9a21ef0decfcac80a1af584ddb064a32805f95a57c7c83a5eb28c9b1 SHA512 210749f6585d8fd39fc63a32dd85d68de4aa480c91915cbf419b9e8a3b300fa4624f03200ed963cecc8ab233777c36e8c522fa0762a2aa068bc65e6f48118328 WHIRLPOOL c791f6718e1c2a97fae26741284d861fc869721fca11b4ab4d3e9b4052ce17fca1fd99f945f406fdcdbfde43622cb7afe351e0268d773f6b42d1da2f5dc0f1f5
+EBUILD libcxx-3.7.1.ebuild 5341 SHA256 b650e8a4dd09153792c9301f941b970e6611fe04403781f4ca54a4d185036eb2 SHA512 12d94732f3446447a0ed025dd7df4ec7711c3d3278c98c2922c85c6b78afe369bcbebee65e259825b4008417decfa4f6438ed803a8e271418b061864ee5de9c0 WHIRLPOOL e27f65ef8dc68e16ba1837b563617a6960dfeab015e64c8e25761003938498dfd7c1577cfa7ac1427ed03a9e24bb5b45ae591d1f226c7ce0bc21a6fe927a74e1
+EBUILD libcxx-3.8.1.ebuild 5720 SHA256 9081a591d0c48fa9ed45866234fdc59f55e44c8ca9056713c2014adf266ea832 SHA512 f674c2647756a1157bdaaa0dfb2ceb923830369d473f4d20bc896f94a3b4aaa5c6e8500b3449ec5e8b7c9b54a74a0002706848f60355a688c5c25425d0a3d1c4 WHIRLPOOL 9b0d7b452c22faf58dec629b0e18ce9013958bdfca2e7455422515988bf4c61cf131e4031e0a7927441f4bc5ad5c3a103d3379f4a583a69628791460d09f78c8
+EBUILD libcxx-3.9.0.ebuild 6794 SHA256 e1b0ed6b0bf8d124110c6c3731cbb31e37a00d4428b50cdd477c92b617a4ad93 SHA512 326cbb999424e5fca216a57b90b850c0d98d43bd93835525aed06fc6fc9354d35cfd51fb1d08683fa06da595dbb4719bf3d90dc67dd5b881b6242f964aba0438 WHIRLPOOL 06afc5984856bcc76e3d1baf47563eaa5fea7af464617620628bf8a6cabd32b84ada983346cca3d132e9a8dc61d533a9f99e30d1f06141566329170db48627b2
+EBUILD libcxx-3.9.1.ebuild 6815 SHA256 15bfb6ec3bdb0fd47a04182a276ed89f4b2acfbad24c2a62c4bcca5190a54283 SHA512 9c9632590b49cd01ad324641ee296f08442940ab1dda1f0c7cdc77abe6b653f70d0baa9b796ef7d77e1f4728e96fe27fcd42d79a389cfcf2b2427b087b9985af WHIRLPOOL 6fff12c49a78e456411cdc6a73b23055f8fc72c154d9a7e5cbf7ad1d5dde21be6b9e2e9e634f2b64377e0045b79370001beb1fba50d21748c6259fffe8cbb7cb
+EBUILD libcxx-4.0.1.ebuild 6303 SHA256 0d1f9bef569a478c14363ef05adb1c87739fd8d21574ba7efbcd1f328cc78eb9 SHA512 72a1d367d03be76b8cc43ea3653563be2c86376c796b759fc99feff4e7489a86875548fffe89ab87b26885a94028a1131a5f295c5e5ec5270dea80f2a6e189aa WHIRLPOOL e3a3549175db909eb606a3dde9581ec52999be593fac27a0b57adb7b493e8ec6a215d7fdfaad3371ca33f4eaac5bd617040f083cc1123fd7737f122d22bca639
+EBUILD libcxx-5.0.0.ebuild 6303 SHA256 0d1f9bef569a478c14363ef05adb1c87739fd8d21574ba7efbcd1f328cc78eb9 SHA512 72a1d367d03be76b8cc43ea3653563be2c86376c796b759fc99feff4e7489a86875548fffe89ab87b26885a94028a1131a5f295c5e5ec5270dea80f2a6e189aa WHIRLPOOL e3a3549175db909eb606a3dde9581ec52999be593fac27a0b57adb7b493e8ec6a215d7fdfaad3371ca33f4eaac5bd617040f083cc1123fd7737f122d22bca639
+EBUILD libcxx-5.0.9999.ebuild 6614 SHA256 7207175d2df08f2bfaf8a451587e1e28faa1cfe3712051171ae9ddad7ec48809 SHA512 b15a6eb21ea58907beed4603cab1088ee9b53adece3a8fded74c50763afe5b565d2cd7ac80b4b5326829a9e32fdf728ddb99c17f5bd3a9a691689a56c8203522 WHIRLPOOL 02caaa85e3c678f6e007ca80ee522d87699bc97cb2eeaa85e09a22d4c26bb3f2a05565afc70ac5aee43a81fe28cf12622ff7e0e7936d96a1a409474664b3cef4
+EBUILD libcxx-9999.ebuild 6458 SHA256 30884b27dd5880833b6efbab08317d43df9b8c09ed264f9c1c52c4cec39a83e7 SHA512 7f73a4a5c868c67e2c479740e6c98f53fea359956fd3758d8f4270a0107158354a4c703810976c65e5d943c46394870f965ffa3d0f930e694d037f400859f36f WHIRLPOOL 27c87c8bd41b9d0fdf97e5ba86a8bb7cf9d9d745e5f8cb39e81e1d22b44760edce245e2c3e1e466dc7a8f257c0c790c4da8ef836cdc4f946860ab7ec587f8191
+MISC ChangeLog 6417 SHA256 9fd5bef2d8c2ac1bae01f2d67f9dfe3a555ef2dd4effa763119a35959d700a83 SHA512 2b377fe2f4c992d75e0442a50cd88647140743dc7b8551e59fc24ad987ceb033cd23c29d832afacb78125497900ed7d9da6c027e58d33acd5da5d0ab026d11f8 WHIRLPOOL 380c99e461793281a68a198d5181bb3c33616a81236aff51da07afc87cadb96459bb94ce1dac9cde87af4517d684de540eb1ce9ce56aec174a95926f185d5cc6
+MISC ChangeLog-2015 7192 SHA256 1f19c485028b68143e12fe8fb77250e7b0cee933dba3390418d398e02ff7bf86 SHA512 648d68c5b8f759170eb6011afc1ef01797f5549068fbc733d6d8e0330a3a08afdadbb3256db04df624ba7e4539eff4489a262fdcc5f00bf67d146dd4c5513755 WHIRLPOOL 73fbaabbb064852de27ad52ee2558764aa9cd5c08e185b397ff92b2435eefcb32bf14caab3c0334c95655ed6e50f414836b2beec10e492ae37813f7e2eca273c
+MISC metadata.xml 854 SHA256 3ec547619ec9246a8013afa8185cc2ec300c77ea5f7794627765fa54e5b8f621 SHA512 8ef3feab266e09442a42baced2d72667fa8b1290624c2c84bab7b173ead72669568847f6e995388fc1d7bc722381f60805d87b2a0cc2d04ae0c49e36bec3802a WHIRLPOOL 3ef9e4095a710085257d418bbb2ad7f10bfe026d65f1684fb75a36418ccd3c314521cb24ec7afd552551a114edc958aa7d3cafab5e8b38975f697767c6adb355
diff --git a/sys-libs/libcxx/files/Makefile b/sys-libs/libcxx/files/Makefile
new file mode 100644
index 000000000000..029e7295b889
--- /dev/null
+++ b/sys-libs/libcxx/files/Makefile
@@ -0,0 +1,38 @@
+CXXFLAGS+=-std=c++11 -fstrict-aliasing -Wall -Wextra -Wshadow -Wconversion \
+	  -Wpadded -Wstrict-aliasing=2 -Wstrict-overflow=4
+
+SRCDIR=..
+LIB=libc++
+STATIC=libc++.a
+MAJOR=1
+MINOR=0
+SHEXT?=.so
+SHLIB=$(LIB)$(SHEXT).$(MAJOR).$(MINOR)
+SONAME=$(LIB)$(SHEXT).$(MAJOR)
+
+SRC=$(wildcard $(SRCDIR)/src/*.cpp)
+OBJ=$(SRC:$(SRCDIR)/src/%.cpp=%.o)
+SOBJ=$(SRC:$(SRCDIR)/src/%.cpp=%.So)
+
+
+%.So: $(SRCDIR)/src/%.cpp
+	$(CXX) -I$(SRCDIR)/include $(CPPFLAGS) $(CXXFLAGS) -fPIC -nostdinc++ -c $< -o $@
+
+%.o: $(SRCDIR)/src/%.cpp
+	$(CXX) -I$(SRCDIR)/include $(CPPFLAGS) $(CXXFLAGS) -nostdinc++ -c $< -o $@
+
+$(STATIC): $(OBJ)
+	$(AR) cr $@ $^
+
+static: $(STATIC)
+
+$(SHLIB): $(SOBJ)
+	$(CXX) -fPIC -nodefaultlibs $(CXXFLAGS) $(LDFLAGS) -shared -Wl,-soname,$(SONAME) -o $@ $^ $(LIBS)
+
+$(SONAME): $(SHLIB)
+	ln -s $< $@
+
+$(LIB)$(SHEXT): $(SONAME)
+	ln -s $< $@
+
+shared: $(SHLIB) $(SONAME) $(LIB)$(SHEXT)
diff --git a/sys-libs/libcxx/files/libcxx-3.8.1-musl-support.patch b/sys-libs/libcxx/files/libcxx-3.8.1-musl-support.patch
new file mode 100644
index 000000000000..ef86254dff17
--- /dev/null
+++ b/sys-libs/libcxx/files/libcxx-3.8.1-musl-support.patch
@@ -0,0 +1,15 @@
+diff --git a/include/__config b/include/__config
+index db5a832..f463557 100644
+--- a/include/__config
++++ b/include/__config
+@@ -11,6 +11,10 @@
+ #ifndef _LIBCPP_CONFIG
+ #define _LIBCPP_CONFIG
+ 
++// Normally this definition is handled by cmake; but since we're not using
++// cmake, we have to hardcode it here.
++#define _LIBCPP_HAS_MUSL_LIBC
++
+ #if defined(_MSC_VER) && !defined(__clang__)
+ #define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
+ #endif
diff --git a/sys-libs/libcxx/files/libcxx-3.9-cmake-link-flags.patch b/sys-libs/libcxx/files/libcxx-3.9-cmake-link-flags.patch
new file mode 100644
index 000000000000..bef5bc187547
--- /dev/null
+++ b/sys-libs/libcxx/files/libcxx-3.9-cmake-link-flags.patch
@@ -0,0 +1,23 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index d618e83..0e76525 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -293,6 +293,18 @@ remove_flags(-DNDEBUG -UNDEBUG -D_DEBUG
+ # so they don't get transformed into -Wno and -errors respectivly.
+ remove_flags(-Wno-pedantic -pedantic-errors -pedantic)
+ 
++# FIXME: this is cribbed from HandleLLVMOptions.cmake.
++if(LIBCXX_STANDALONE_BUILD)
++  # Pass -Wl,-z,defs. This makes sure all symbols are defined. Otherwise a DSO
++  # build might work on ELF but fail on MachO/COFF.
++  if(NOT (${CMAKE_SYSTEM_NAME} MATCHES "Darwin" OR WIN32 OR CYGWIN OR
++          ${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD" OR
++          ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD") AND
++     NOT LLVM_USE_SANITIZER)
++    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-z,defs")
++  endif()
++endif()
++
+ # Required flags ==============================================================
+ add_compile_flags_if_supported(-std=c++11)
+ if (NOT MSVC AND NOT LIBCXX_SUPPORTS_STD_EQ_CXX11_FLAG)
diff --git a/sys-libs/libcxx/files/libcxx-3.9-cmake-static-lib.patch b/sys-libs/libcxx/files/libcxx-3.9-cmake-static-lib.patch
new file mode 100644
index 000000000000..5f0e31864dfd
--- /dev/null
+++ b/sys-libs/libcxx/files/libcxx-3.9-cmake-static-lib.patch
@@ -0,0 +1,196 @@
+From b640da0b315ead39690d4d65c76938ab8aeb5449 Mon Sep 17 00:00:00 2001
+From: Petr Hosek <phosek@chromium.org>
+Date: Mon, 8 Aug 2016 22:57:25 +0000
+Subject: [PATCH] Allow building both shared and static library
+
+This change allows building both shared and static version of libc++
+in a single build, sharing object files between both versions.
+
+Differential Revision: https://reviews.llvm.org/D23232
+
+git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@278068 91177308-0d34-0410-b5e6-96231b3b80d8
+---
+ CMakeLists.txt          |  5 ++++
+ docs/BuildingLibcxx.rst | 11 ++++++--
+ lib/CMakeLists.txt      | 71 ++++++++++++++++++++++++++++++++++---------------
+ 3 files changed, 63 insertions(+), 24 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 950070d..98886b0 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -52,6 +52,7 @@ MACRO_ENSURE_OUT_OF_SOURCE_BUILD(
+ # Basic options ---------------------------------------------------------------
+ option(LIBCXX_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
+ option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON)
++option(LIBCXX_ENABLE_STATIC "Build libc++ as a static library." ON)
+ option(LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY "Build libc++experimental.a" ON)
+ option(LIBCXX_ENABLE_FILESYSTEM
+         "Build filesystem as part of libc++experimental.a" ${LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY})
+@@ -68,6 +69,10 @@ option(LIBCXX_INSTALL_EXPERIMENTAL_LIBRARY "Install libc++experimental.a" OFF)
+ set(LIBCXX_ABI_VERSION 1 CACHE STRING "ABI version of libc++.")
+ option(LIBCXX_ABI_UNSTABLE "Unstable ABI of libc++." OFF)
+ 
++if (NOT LIBCXX_ENABLE_SHARED AND NOT LIBCXX_ENABLE_STATIC)
++  message(FATAL_ERROR "libc++ must be built as either a shared or static library.")
++endif()
++
+ # ABI Library options ---------------------------------------------------------
+ set(LIBCXX_CXX_ABI "${LIBCXX_CXX_ABI}" CACHE STRING
+     "Specify C++ ABI library to use." FORCE)
+diff --git a/docs/BuildingLibcxx.rst b/docs/BuildingLibcxx.rst
+index 5dd174a..6709352 100644
+--- a/docs/BuildingLibcxx.rst
++++ b/docs/BuildingLibcxx.rst
+@@ -150,8 +150,15 @@ libc++ specific options
+ 
+   **Default**: ``ON``
+ 
+-  Build libc++ as a shared library. If ``OFF`` is specified then libc++ is
+-  built as a static library.
++  Build libc++ as a shared library. Either :option:`LIBCXX_ENABLE_SHARED` or
++  :option:`LIBCXX_ENABLE_STATIC` has to be enabled.
++
++.. option:: LIBCXX_ENABLE_STATIC:BOOL
++
++  **Default**: ``ON``
++
++  Build libc++ as a static library. Either :option:`LIBCXX_ENABLE_SHARED` or
++  :option:`LIBCXX_ENABLE_STATIC` has to be enabled.
+ 
+ .. option:: LIBCXX_LIBDIR_SUFFIX:STRING
+ 
+diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
+index afc388e..cabf2e6 100644
+--- a/lib/CMakeLists.txt
++++ b/lib/CMakeLists.txt
+@@ -28,16 +28,6 @@ if(NOT LIBCXX_INSTALL_LIBRARY)
+   set(exclude_from_all EXCLUDE_FROM_ALL)
+ endif()
+ 
+-if (LIBCXX_ENABLE_SHARED)
+-  add_library(cxx SHARED ${exclude_from_all} ${LIBCXX_SOURCES} ${LIBCXX_HEADERS})
+-else()
+-  add_library(cxx STATIC ${exclude_from_all} ${LIBCXX_SOURCES} ${LIBCXX_HEADERS})
+-endif()
+-
+-if (DEFINED LIBCXX_CXX_ABI_DEPS)
+-  add_dependencies(cxx LIBCXX_CXX_ABI_DEPS)
+-endif()
+-
+ #if LIBCXX_CXX_ABI_LIBRARY_PATH is defined we want to add it to the search path.
+ add_link_flags_if(LIBCXX_CXX_ABI_LIBRARY_PATH "-L${LIBCXX_CXX_ABI_LIBRARY_PATH}")
+ 
+@@ -139,18 +129,51 @@ if ( APPLE AND (LIBCXX_CXX_ABI_LIBNAME STREQUAL "libcxxabi" OR
+   endif()
+ endif()
+ 
+-target_link_libraries(cxx ${LIBCXX_LIBRARIES})
+ split_list(LIBCXX_COMPILE_FLAGS)
+ split_list(LIBCXX_LINK_FLAGS)
+ 
+-set_target_properties(cxx
++# Add a object library that contains the compiled source files.
++add_library(cxx_objects OBJECT ${exclude_from_all} ${LIBCXX_SOURCES} ${LIBCXX_HEADERS})
++
++set_target_properties(cxx_objects
+   PROPERTIES
+     COMPILE_FLAGS "${LIBCXX_COMPILE_FLAGS}"
+-    LINK_FLAGS    "${LIBCXX_LINK_FLAGS}"
+-    OUTPUT_NAME   "c++"
+-    VERSION       "${LIBCXX_ABI_VERSION}.0"
+-    SOVERSION     "${LIBCXX_ABI_VERSION}"
++)
++
++set(LIBCXX_TARGETS)
++
++# Build the shared library.
++if (LIBCXX_ENABLE_SHARED)
++  add_library(cxx_shared SHARED $<TARGET_OBJECTS:cxx_objects>)
++  target_link_libraries(cxx_shared ${LIBCXX_LIBRARIES})
++  set_target_properties(cxx_shared
++    PROPERTIES
++      LINK_FLAGS    "${LIBCXX_LINK_FLAGS}"
++      OUTPUT_NAME   "c++"
++      VERSION       "${LIBCXX_ABI_VERSION}.0"
++      SOVERSION     "${LIBCXX_ABI_VERSION}"
+   )
++  list(APPEND LIBCXX_TARGETS "cxx_shared")
++endif()
++
++# Build the static library.
++if (LIBCXX_ENABLE_STATIC)
++  add_library(cxx_static STATIC $<TARGET_OBJECTS:cxx_objects>)
++  target_link_libraries(cxx_static ${LIBCXX_LIBRARIES})
++  set_target_properties(cxx_static
++    PROPERTIES
++      LINK_FLAGS    "${LIBCXX_LINK_FLAGS}"
++      OUTPUT_NAME   "c++"
++  )
++  list(APPEND LIBCXX_TARGETS "cxx_static")
++endif()
++
++# Add a meta-target for both libraries.
++add_custom_target(cxx DEPENDS ${LIBCXX_TARGETS})
++
++if (DEFINED LIBCXX_CXX_ABI_DEPS)
++  add_dependencies(cxx LIBCXX_CXX_ABI_DEPS)
++endif()
+ 
+ if (LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY)
+   file(GLOB LIBCXX_EXPERIMENTAL_SOURCES ../src/experimental/*.cpp)
+@@ -158,7 +181,11 @@ if (LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY)
+     file(GLOB LIBCXX_FILESYSTEM_SOURCES ../src/experimental/filesystem/*.cpp)
+   endif()
+   add_library(cxx_experimental STATIC ${LIBCXX_EXPERIMENTAL_SOURCES} ${LIBCXX_FILESYSTEM_SOURCES})
+-  target_link_libraries(cxx_experimental cxx)
++  if (LIBCXX_ENABLE_SHARED)
++    target_link_libraries(cxx_experimental cxx_shared)
++  else()
++    target_link_libraries(cxx_experimental cxx_static)
++  endif()
+ 
+   set(experimental_flags "${LIBCXX_COMPILE_FLAGS}")
+   check_flag_supported(-std=c++14)
+@@ -174,7 +201,7 @@ endif()
+ 
+ # Generate a linker script inplace of a libc++.so symlink. Rerun this command
+ # after cxx builds.
+-if (LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
++if (LIBCXX_ENABLE_SHARED AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
+   # Get the name of the ABI library and handle the case where CXXABI_LIBNAME
+   # is a target name and not a library. Ex cxxabi_shared.
+   set(SCRIPT_ABI_LIBNAME "${LIBCXX_CXX_ABI_LIBRARY}")
+@@ -183,11 +210,11 @@ if (LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
+   endif()
+   # Generate a linker script inplace of a libc++.so symlink. Rerun this command
+   # after cxx builds.
+-  add_custom_command(TARGET cxx POST_BUILD
++  add_custom_command(TARGET cxx_shared POST_BUILD
+     COMMAND
+       ${PYTHON_EXECUTABLE} ${LIBCXX_SOURCE_DIR}/utils/gen_link_script/gen_link_script.py
+     ARGS
+-      "$<TARGET_LINKER_FILE:cxx>"
++      "$<TARGET_LINKER_FILE:cxx_shared>"
+       "${SCRIPT_ABI_LIBNAME}"
+     WORKING_DIRECTORY ${LIBCXX_BUILD_DIR}
+   )
+@@ -197,13 +224,13 @@ if (LIBCXX_INSTALL_LIBRARY)
+   if (LIBCXX_INSTALL_EXPERIMENTAL_LIBRARY)
+     set(experimental_lib cxx_experimental)
+   endif()
+-  install(TARGETS cxx ${experimental_lib}
++  install(TARGETS ${LIBCXX_TARGETS} ${experimental_lib}
+     LIBRARY DESTINATION lib${LIBCXX_LIBDIR_SUFFIX} COMPONENT libcxx
+     ARCHIVE DESTINATION lib${LIBCXX_LIBDIR_SUFFIX} COMPONENT libcxx
+     )
+   # NOTE: This install command must go after the cxx install command otherwise
+   # it will not be executed after the library symlinks are installed.
+-  if (LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
++  if (LIBCXX_ENABLE_SHARED AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
+     # Replace the libc++ filename with $<TARGET_LINKER_FILE:cxx>
+     # after we required CMake 3.0.
+     install(FILES "${LIBCXX_LIBRARY_DIR}/libc++${CMAKE_SHARED_LIBRARY_SUFFIX}"
+-- 
+2.4.10
+
diff --git a/sys-libs/libcxx/files/prepare_snapshot.sh b/sys-libs/libcxx/files/prepare_snapshot.sh
new file mode 100755
index 000000000000..3de5a97a8096
--- /dev/null
+++ b/sys-libs/libcxx/files/prepare_snapshot.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+VERSION=$(date +%Y%m%d)
+BASE_VERSION="0.0"
+PACKAGE="libcxx-${BASE_VERSION}_p${VERSION}"
+
+svn co http://llvm.org/svn/llvm-project/libcxx/trunk ${PACKAGE}
+
+find "${PACKAGE}" -type d -name '.svn' -prune -print0 | xargs -0 rm -rf
+find "${PACKAGE}" -type d -name '.git' -prune -print0 | xargs -0 rm -rf
+
+tar cJf ${PACKAGE}.tar.xz ${PACKAGE}
+rm -rf ${PACKAGE}/
+
+echo "Tarball: \"${PACKAGE}.tar.xz\""
+
+echo "** all done **"
diff --git a/sys-libs/libcxx/libcxx-3.7.1.ebuild b/sys-libs/libcxx/libcxx-3.7.1.ebuild
new file mode 100644
index 000000000000..3535d3d94043
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-3.7.1.ebuild
@@ -0,0 +1,169 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=5
+
+ESVN_REPO_URI="https://llvm.org/svn/llvm-project/libcxx/trunk"
+
+[ "${PV%9999}" != "${PV}" ] && SCM="subversion" || SCM=""
+
+inherit ${SCM} flag-o-matic toolchain-funcs multilib multilib-minimal
+
+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
+HOMEPAGE="https://libcxx.llvm.org/"
+if [ "${PV%9999}" = "${PV}" ] ; then
+	SRC_URI="https://llvm.org/releases/${PV}/${P}.src.tar.xz"
+	S="${WORKDIR}/${P}.src"
+else
+	SRC_URI=""
+fi
+
+LICENSE="|| ( UoI-NCSA MIT )"
+SLOT="0"
+if [ "${PV%9999}" = "${PV}" ] ; then
+	KEYWORDS="~amd64 ~mips ~x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux"
+else
+	KEYWORDS=""
+fi
+IUSE="elibc_glibc +libcxxrt +static-libs test"
+
+RDEPEND="libcxxrt? ( >=sys-libs/libcxxrt-0.0_p20130725[static-libs?,${MULTILIB_USEDEP}] )
+	!libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] )"
+DEPEND="${RDEPEND}
+	test? ( sys-devel/clang )
+	app-arch/xz-utils"
+
+DOCS=( CREDITS.TXT )
+
+pkg_setup() {
+	if ! use libcxxrt ; then
+		ewarn "You have disabled USE=libcxxrt. This will build ${PN} against"
+		ewarn "libsupc++. Please note that this is not well supported."
+		ewarn "In particular, static linking will not work."
+	fi
+	if [[ $(gcc-version) < 4.7 ]] && [[ $(tc-getCXX) != *clang++* ]] ; then
+		eerror "${PN} needs to be built with clang++ or gcc-4.7 or later."
+		eerror "Please use gcc-config to switch to gcc-4.7 or later version."
+		die
+	fi
+}
+
+src_prepare() {
+	cp -f "${FILESDIR}/Makefile" lib/ || die
+	multilib_copy_sources
+}
+
+src_configure() {
+	export LIBS="-lpthread -lrt -lc -lgcc_s"
+	if use libcxxrt ; then
+		append-cppflags -DLIBCXXRT "-I${EPREFIX}/usr/include/libcxxrt/"
+		LIBS="-lcxxrt ${LIBS}"
+		cp "${EPREFIX}/usr/include/libcxxrt/"*.h "${S}/include"
+	else
+		# Very hackish, see $HOMEPAGE
+		# If someone has a clever idea, please share it!
+		local includes="$(echo | ${CHOST}-g++ -Wp,-v -x c++ - -fsyntax-only 2>&1 | grep -C 2 '#include.*<...>' | tail -n 2 | sed -e 's/^ /-I/' | tr '\n' ' ')"
+		local libcxx_gcc_dirs="$(echo | ${CHOST}-g++ -Wp,-v -x c++ - -fsyntax-only 2>&1 | grep -C 2 '#include.*<...>' | tail -n 2 | tr '\n' ' ')"
+		append-cppflags -D__GLIBCXX__ ${includes}
+		LIBS="-lsupc++ ${LIBS}"
+		local libsupcxx_includes="cxxabi.h bits/c++config.h bits/os_defines.h bits/cpu_defines.h bits/cxxabi_tweaks.h bits/cxxabi_forced.h"
+		for i in ${libsupcxx_includes} ; do
+			local found=""
+			[ -d "${S}/include/$(dirname ${i})/" ] || mkdir -p "${S}/include/$(dirname ${i})"
+			for j in ${libcxx_gcc_dirs} ; do
+				if [ -f "${j}/${i}" ] ; then
+					cp "${j}/${i}" "${S}/include/$(dirname ${i})/" || die
+					found=yes
+				fi
+			done
+			[ -n "${found}" ] || die "Header not found: ${i}"
+		done
+	fi
+
+	tc-export AR CC CXX
+
+	append-ldflags "-Wl,-z,defs" # make sure we are not underlinked
+}
+
+multilib_src_compile() {
+	cd "${BUILD_DIR}/lib" || die
+	emake shared
+	use static-libs && emake static
+}
+
+# Tests fail for now, if anybody is able to fix them, help is very welcome.
+multilib_src_test() {
+	cd "${BUILD_DIR}/test"
+	LD_LIBRARY_PATH="${BUILD_DIR}/lib:${LD_LIBRARY_PATH}" \
+		CC="clang++ $(get_abi_CFLAGS) ${CXXFLAGS}" \
+		HEADER_INCLUDE="-I${BUILD_DIR}/include" \
+		SOURCE_LIB="-L${BUILD_DIR}/lib" \
+		LIBS="-lm $(usex libcxxrt -lcxxrt "")" \
+		./testit || die
+	# TODO: fix link against libsupc++
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
+	[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
+
+	cat <<-END_LDSCRIPT
+/* GNU ld script
+   Include missing dependencies
+*/
+${output_format}
+GROUP ( $@ )
+END_LDSCRIPT
+}
+
+gen_static_ldscript() {
+	if use libcxxrt ; then
+		# Move it first.
+		mv "${ED}/usr/$(get_libdir)/libc++.a" "${ED}/usr/$(get_libdir)/libc++_static.a" || die
+
+		# Generate libc++.a ldscript for inclusion of its dependencies so that
+		# clang++ -stdlib=libc++ -static works out of the box.
+		local deps="${EPREFIX}/usr/$(get_libdir)/libc++_static.a ${EPREFIX}/usr/$(get_libdir)/libcxxrt.a"
+		# On Linux/glibc it does not link without libpthread or libdl. It is
+		# fine on FreeBSD.
+		use elibc_glibc && deps="${deps} ${EPREFIX}/usr/$(get_libdir)/libpthread.a ${EPREFIX}/usr/$(get_libdir)/libdl.a"
+
+		gen_ldscript "${deps}" > "${ED}/usr/$(get_libdir)/libc++.a"
+	fi
+	# TODO: Generate a libc++.a ldscript when building against libsupc++
+}
+
+gen_shared_ldscript() {
+	if use libcxxrt ; then
+		mv "${ED}/usr/$(get_libdir)/libc++.so" "${ED}/usr/$(get_libdir)/libc++_shared.so" || die
+		local deps="${EPREFIX}/usr/$(get_libdir)/libc++_shared.so ${EPREFIX}/usr/$(get_libdir)/libcxxrt.so"
+		gen_ldscript "${deps}" > "${ED}/usr/$(get_libdir)/libc++.so"
+	fi
+	# TODO: Generate the linker script for other confiurations too.
+}
+
+multilib_src_install() {
+	cd "${BUILD_DIR}/lib"
+	if use static-libs ; then
+		dolib.a libc++.a
+		gen_static_ldscript
+	fi
+	dolib.so libc++.so*
+	gen_shared_ldscript
+}
+
+multilib_src_install_all() {
+	einstalldocs
+	insinto /usr/include/c++/v1
+	doins -r include/*
+}
+
+pkg_postinst() {
+	elog "This package (${PN}) is mainly intended as a replacement for the C++"
+	elog "standard library when using clang."
+	elog "To use it, instead of libstdc++, use:"
+	elog "    clang++ -stdlib=libc++"
+	elog "to compile your C++ programs."
+}
diff --git a/sys-libs/libcxx/libcxx-3.8.1.ebuild b/sys-libs/libcxx/libcxx-3.8.1.ebuild
new file mode 100644
index 000000000000..33c990ecd408
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-3.8.1.ebuild
@@ -0,0 +1,176 @@
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=5
+
+ESVN_REPO_URI="https://llvm.org/svn/llvm-project/libcxx/trunk"
+
+[ "${PV%9999}" != "${PV}" ] && SCM="subversion" || SCM=""
+
+inherit ${SCM} flag-o-matic toolchain-funcs multilib multilib-minimal
+
+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
+HOMEPAGE="https://libcxx.llvm.org/"
+if [ "${PV%9999}" = "${PV}" ] ; then
+	SRC_URI="https://llvm.org/releases/${PV}/${P}.src.tar.xz"
+	S="${WORKDIR}/${P}.src"
+else
+	SRC_URI=""
+fi
+
+LICENSE="|| ( UoI-NCSA MIT )"
+SLOT="0"
+if [ "${PV%9999}" = "${PV}" ] ; then
+	KEYWORDS="~amd64 ~mips ~x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux"
+else
+	KEYWORDS=""
+fi
+IUSE="elibc_glibc elibc_musl +libcxxrt libunwind +static-libs test"
+REQUIRED_USE="libunwind? ( libcxxrt )"
+
+RDEPEND="libcxxrt? ( >=sys-libs/libcxxrt-0.0_p20130725[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	!libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] )"
+DEPEND="${RDEPEND}
+	test? ( sys-devel/clang )
+	app-arch/xz-utils"
+
+DOCS=( CREDITS.TXT )
+
+pkg_setup() {
+	if ! use libcxxrt ; then
+		ewarn "You have disabled USE=libcxxrt. This will build ${PN} against"
+		ewarn "libsupc++. Please note that this is not well supported."
+		ewarn "In particular, static linking will not work."
+	fi
+	if tc-is-gcc && [[ $(gcc-version) < 4.7 ]] ; then
+		eerror "${PN} needs to be built with gcc-4.7 or later (or other"
+		eerror "conformant compilers). Please use gcc-config to switch to"
+		eerror "gcc-4.7 or later version."
+		die
+	fi
+}
+
+src_prepare() {
+	cp -f "${FILESDIR}/Makefile" lib/ || die
+	use elibc_musl && epatch "${FILESDIR}/${P}-musl-support.patch"
+	multilib_copy_sources
+}
+
+src_configure() {
+	export LIBS="-lpthread -lrt -lc -l$(usex libunwind unwind gcc_s)"
+	if use libcxxrt ; then
+		append-cppflags -DLIBCXXRT "-I${EPREFIX}/usr/include/libcxxrt/"
+		LIBS="-lcxxrt ${LIBS}"
+		cp "${EPREFIX}/usr/include/libcxxrt/"*.h "${S}/include"
+	else
+		# Very hackish, see $HOMEPAGE
+		# If someone has a clever idea, please share it!
+		local includes="$(echo | ${CHOST}-g++ -Wp,-v -x c++ - -fsyntax-only 2>&1 | grep -C 2 '#include.*<...>' | tail -n 2 | sed -e 's/^ /-I/' | tr '\n' ' ')"
+		local libcxx_gcc_dirs="$(echo | ${CHOST}-g++ -Wp,-v -x c++ - -fsyntax-only 2>&1 | grep -C 2 '#include.*<...>' | tail -n 2 | tr '\n' ' ')"
+		append-cppflags -D__GLIBCXX__ ${includes}
+		LIBS="-lsupc++ ${LIBS}"
+		local libsupcxx_includes="cxxabi.h bits/c++config.h bits/os_defines.h bits/cpu_defines.h bits/cxxabi_tweaks.h bits/cxxabi_forced.h"
+		for i in ${libsupcxx_includes} ; do
+			local found=""
+			[ -d "${S}/include/$(dirname ${i})/" ] || mkdir -p "${S}/include/$(dirname ${i})"
+			for j in ${libcxx_gcc_dirs} ; do
+				if [ -f "${j}/${i}" ] ; then
+					cp "${j}/${i}" "${S}/include/$(dirname ${i})/" || die
+					found=yes
+				fi
+			done
+			[ -n "${found}" ] || die "Header not found: ${i}"
+		done
+	fi
+
+	tc-export AR CC CXX
+
+	append-ldflags "-Wl,-z,defs" # make sure we are not underlinked
+}
+
+multilib_src_compile() {
+	cd "${BUILD_DIR}/lib" || die
+	emake shared
+	use static-libs && emake static
+}
+
+# Tests fail for now, if anybody is able to fix them, help is very welcome.
+multilib_src_test() {
+	cd "${BUILD_DIR}/test"
+	LD_LIBRARY_PATH="${BUILD_DIR}/lib:${LD_LIBRARY_PATH}" \
+		CC="clang++ $(get_abi_CFLAGS) ${CXXFLAGS}" \
+		HEADER_INCLUDE="-I${BUILD_DIR}/include" \
+		SOURCE_LIB="-L${BUILD_DIR}/lib" \
+		LIBS="-lm $(usex libcxxrt -lcxxrt "")" \
+		./testit || die
+	# TODO: fix link against libsupc++
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
+	[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
+
+	cat <<-END_LDSCRIPT
+/* GNU ld script
+   Include missing dependencies
+*/
+${output_format}
+GROUP ( $@ )
+END_LDSCRIPT
+}
+
+gen_static_ldscript() {
+	if use libcxxrt ; then
+		# Move it first.
+		mv "${ED}/usr/$(get_libdir)/libc++.a" "${ED}/usr/$(get_libdir)/libc++_static.a" || die
+
+		# Generate libc++.a ldscript for inclusion of its dependencies so that
+		# clang++ -stdlib=libc++ -static works out of the box.
+		local deps="${EPREFIX}/usr/$(get_libdir)/libc++_static.a ${EPREFIX}/usr/$(get_libdir)/libcxxrt.a"
+		# On Linux/glibc it does not link without libpthread or libdl. It is
+		# fine on FreeBSD.
+		use elibc_glibc && deps="${deps} ${EPREFIX}/usr/$(get_libdir)/libpthread.a ${EPREFIX}/usr/$(get_libdir)/libdl.a"
+
+		# unlike libgcc_s, libunwind is not implicitly linked
+		use libunwind && deps="${deps} ${EPREFIX}/usr/$(get_libdir)/libunwind.a"
+
+		gen_ldscript "${deps}" > "${ED}/usr/$(get_libdir)/libc++.a"
+	fi
+	# TODO: Generate a libc++.a ldscript when building against libsupc++
+}
+
+gen_shared_ldscript() {
+	if use libcxxrt ; then
+		mv "${ED}/usr/$(get_libdir)/libc++.so" "${ED}/usr/$(get_libdir)/libc++_shared.so" || die
+		local deps="${EPREFIX}/usr/$(get_libdir)/libc++_shared.so ${EPREFIX}/usr/$(get_libdir)/libcxxrt.so"
+		use libunwind && deps="${deps} ${EPREFIX}/usr/$(get_libdir)/libunwind.so"
+		gen_ldscript "${deps}" > "${ED}/usr/$(get_libdir)/libc++.so"
+	fi
+	# TODO: Generate the linker script for other configurations too.
+}
+
+multilib_src_install() {
+	cd "${BUILD_DIR}/lib"
+	if use static-libs ; then
+		dolib.a libc++.a
+		gen_static_ldscript
+	fi
+	dolib.so libc++.so*
+	gen_shared_ldscript
+}
+
+multilib_src_install_all() {
+	einstalldocs
+	insinto /usr/include/c++/v1
+	doins -r include/*
+}
+
+pkg_postinst() {
+	elog "This package (${PN}) is mainly intended as a replacement for the C++"
+	elog "standard library when using clang."
+	elog "To use it, instead of libstdc++, use:"
+	elog "    clang++ -stdlib=libc++"
+	elog "to compile your C++ programs."
+}
diff --git a/sys-libs/libcxx/libcxx-3.9.0.ebuild b/sys-libs/libcxx/libcxx-3.9.0.ebuild
new file mode 100644
index 000000000000..185bbc3d7be0
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-3.9.0.ebuild
@@ -0,0 +1,216 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+# Ninja provides better scalability and cleaner verbose output, and is used
+# throughout all LLVM projects.
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+EGIT_REPO_URI="https://llvm.org/git/libcxx.git
+	https://github.com/llvm-mirror/libcxx.git"
+PYTHON_COMPAT=( python2_7 )
+
+[[ ${PV} == 9999 ]] && SCM="git-r3" || SCM=""
+
+inherit ${SCM} cmake-multilib python-any-r1 toolchain-funcs
+
+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
+HOMEPAGE="https://libcxx.llvm.org/"
+if [[ ${PV} != 9999 ]] ; then
+	SRC_URI="https://llvm.org/releases/${PV}/${P}.src.tar.xz"
+	S="${WORKDIR}/${P}.src"
+else
+	SRC_URI=""
+fi
+
+LICENSE="|| ( UoI-NCSA MIT )"
+SLOT="0"
+if [[ ${PV} != 9999 ]] ; then
+	KEYWORDS="~amd64 ~x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux"
+else
+	KEYWORDS=""
+fi
+IUSE="elibc_glibc elibc_musl libcxxabi +libcxxrt libunwind +static-libs test"
+REQUIRED_USE="libunwind? ( || ( libcxxabi libcxxrt ) )
+	?? ( libcxxabi libcxxrt )"
+
+RDEPEND="
+	libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	libcxxrt? ( sys-libs/libcxxrt[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	!libcxxabi? ( !libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] ) )"
+# llvm-3.9.0 needed because its cmake files installation path changed, which is
+# needed by libcxx
+# clang-3.9.0 installs necessary target symlinks unconditionally
+# which removes the need for MULTILIB_USEDEP
+DEPEND="${RDEPEND}
+	test? ( >=sys-devel/clang-3.9.0
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') )
+	app-arch/xz-utils
+	>=sys-devel/llvm-3.9.0"
+
+DOCS=( CREDITS.TXT )
+
+PATCHES=(
+	# Add link flag "-Wl,-z,defs" to avoid underlinking; this is needed in a
+	# out-of-tree build.
+	"${FILESDIR}/${PN}-3.9-cmake-link-flags.patch"
+
+	# Back-port of https://reviews.llvm.org/D23232, allowing building both
+	# shared and static libs in one run.
+	"${FILESDIR}/${PN}-3.9-cmake-static-lib.patch"
+)
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	use test && python-any-r1_pkg_setup
+
+	if ! use libcxxabi && ! use libcxxrt && ! tc-is-gcc ; then
+		eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
+		eerror "compilers are not supported. Please set CC=gcc and CXX=g++"
+		eerror "and try again."
+		die
+	fi
+	if tc-is-gcc && [[ $(gcc-version) < 4.7 ]] ; then
+		eerror "${PN} needs to be built with gcc-4.7 or later (or other"
+		eerror "conformant compilers). Please use gcc-config to switch to"
+		eerror "gcc-4.7 or later version."
+		die
+	fi
+}
+
+src_configure() {
+	NATIVE_LIBDIR=$(get_libdir)
+	cmake-multilib_src_configure
+}
+
+multilib_src_configure() {
+	local cxxabi cxxabi_incs
+	if use libcxxabi; then
+		cxxabi=libcxxabi
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
+	elif use libcxxrt; then
+		cxxabi=libcxxrt
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxrt"
+	else
+		local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
+		cxxabi=libsupc++
+		cxxabi_incs="${gcc_inc};${gcc_inc}/${CHOST}"
+	fi
+
+	# we want -lgcc_s for unwinder, and for compiler runtime when using
+	# gcc, clang with gcc runtime (or any unknown compiler)
+	local extra_libs=() want_gcc_s=ON
+	if use libunwind; then
+		# work-around missing -lunwind upstream
+		extra_libs+=( -lunwind )
+		# if we're using libunwind and clang with compiler-rt, we want
+		# to link to compiler-rt instead of -lgcc_s
+		if tc-is-clang; then
+			# get the full library list out of 'pretend mode'
+			# and grep it for libclang_rt references
+			local args=( $($(tc-getCC) -### -x c - 2>&1 | tail -n 1) )
+			local i
+			for i in "${args[@]}"; do
+				if [[ ${i} == *libclang_rt* ]]; then
+					want_gcc_s=OFF
+					extra_libs+=( "${i}" )
+				fi
+			done
+		fi
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		# LLVM_LIBDIR_SUFFIX is used to find CMake files
+		# and we are happy to use the native set
+		-DLLVM_LIBDIR_SUFFIX=${NATIVE_LIBDIR#lib}
+		-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=$(usex static-libs)
+		-DLIBCXX_CXX_ABI=${cxxabi}
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=${cxxabi_incs}
+		# we're using our own mechanism for generating linker scripts
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
+		-DLIBCXX_INCLUDE_TESTS=$(usex test)
+		-DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}"
+	)
+
+	if use test; then
+		mycmakeargs+=(
+			# this can be any directory, it just needs to exist...
+			-DLLVM_MAIN_SRC_DIR="${T}"
+			-DLIT_COMMAND="${EPREFIX}"/usr/bin/lit
+		)
+	fi
+	cmake-utils_src_configure
+}
+
+multilib_src_test() {
+	local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
+
+	[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
+	sed -i -e "/cxx_under_test/s^\".*\"^\"${clang_path}\"^" test/lit.site.cfg || die
+
+	cmake-utils_src_make check-libcxx
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
+	[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
+
+	cat <<-END_LDSCRIPT
+/* GNU ld script
+   Include missing dependencies
+*/
+${output_format}
+GROUP ( $@ )
+END_LDSCRIPT
+}
+
+gen_static_ldscript() {
+	local libdir=$(get_libdir)
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.a" "$(usex libcxxrt "libcxxrt.a" "libsupc++.a")")
+
+	# Move it first.
+	mv "${ED}/usr/${libdir}/libc++.a" "${ED}/usr/${libdir}/libc++_static.a" || die
+	# Generate libc++.a ldscript for inclusion of its dependencies so that
+	# clang++ -stdlib=libc++ -static works out of the box.
+	local deps="libc++_static.a ${cxxabi_lib} $(usex libunwind libunwind.a libgcc_eh.a)"
+	# On Linux/glibc it does not link without libpthread or libdl. It is
+	# fine on FreeBSD.
+	use elibc_glibc && deps+=" libpthread.a libdl.a"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.a" || die
+}
+
+gen_shared_ldscript() {
+	local libdir=$(get_libdir)
+	# libsupc++ doesn't have a shared version
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.so" "$(usex libcxxrt "libcxxrt.so" "libsupc++.a")")
+
+	mv "${ED}/usr/${libdir}/libc++.so" "${ED}/usr/${libdir}/libc++_shared.so" || die
+	local deps="libc++_shared.so ${cxxabi_lib} $(usex libunwind libunwind.so libgcc_s.so)"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.so" || die
+}
+
+multilib_src_install() {
+	cmake-utils_src_install
+	gen_shared_ldscript
+	use static-libs && gen_static_ldscript
+}
+
+pkg_postinst() {
+	elog "This package (${PN}) is mainly intended as a replacement for the C++"
+	elog "standard library when using clang."
+	elog "To use it, instead of libstdc++, use:"
+	elog "    clang++ -stdlib=libc++"
+	elog "to compile your C++ programs."
+}
diff --git a/sys-libs/libcxx/libcxx-3.9.1.ebuild b/sys-libs/libcxx/libcxx-3.9.1.ebuild
new file mode 100644
index 000000000000..e847a9f5d318
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-3.9.1.ebuild
@@ -0,0 +1,216 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+# Ninja provides better scalability and cleaner verbose output, and is used
+# throughout all LLVM projects.
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+EGIT_REPO_URI="https://llvm.org/git/libcxx.git
+	https://github.com/llvm-mirror/libcxx.git"
+PYTHON_COMPAT=( python2_7 )
+
+[[ ${PV} == 9999 ]] && SCM="git-r3" || SCM=""
+
+inherit ${SCM} cmake-multilib python-any-r1 toolchain-funcs
+
+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
+HOMEPAGE="https://libcxx.llvm.org/"
+if [[ ${PV} != 9999 ]] ; then
+	SRC_URI="https://llvm.org/releases/${PV}/${P}.src.tar.xz"
+	S="${WORKDIR}/${P}.src"
+else
+	SRC_URI=""
+fi
+
+LICENSE="|| ( UoI-NCSA MIT )"
+SLOT="0"
+if [[ ${PV} != 9999 ]] ; then
+	KEYWORDS="amd64 ~arm64 x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux"
+else
+	KEYWORDS="amd64 ~arm64 x86"
+fi
+IUSE="elibc_glibc elibc_musl libcxxabi +libcxxrt libunwind +static-libs test"
+REQUIRED_USE="libunwind? ( || ( libcxxabi libcxxrt ) )
+	?? ( libcxxabi libcxxrt )"
+
+RDEPEND="
+	libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	libcxxrt? ( sys-libs/libcxxrt[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	!libcxxabi? ( !libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] ) )"
+# llvm-3.9.0 needed because its cmake files installation path changed, which is
+# needed by libcxx
+# clang-3.9.0 installs necessary target symlinks unconditionally
+# which removes the need for MULTILIB_USEDEP
+DEPEND="${RDEPEND}
+	test? ( >=sys-devel/clang-3.9.0
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') )
+	app-arch/xz-utils
+	>=sys-devel/llvm-3.9.0"
+
+DOCS=( CREDITS.TXT )
+
+PATCHES=(
+	# Add link flag "-Wl,-z,defs" to avoid underlinking; this is needed in a
+	# out-of-tree build.
+	"${FILESDIR}/${PN}-3.9-cmake-link-flags.patch"
+
+	# Back-port of https://reviews.llvm.org/D23232, allowing building both
+	# shared and static libs in one run.
+	"${FILESDIR}/${PN}-3.9-cmake-static-lib.patch"
+)
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	use test && python-any-r1_pkg_setup
+
+	if ! use libcxxabi && ! use libcxxrt && ! tc-is-gcc ; then
+		eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
+		eerror "compilers are not supported. Please set CC=gcc and CXX=g++"
+		eerror "and try again."
+		die
+	fi
+	if tc-is-gcc && [[ $(gcc-version) < 4.7 ]] ; then
+		eerror "${PN} needs to be built with gcc-4.7 or later (or other"
+		eerror "conformant compilers). Please use gcc-config to switch to"
+		eerror "gcc-4.7 or later version."
+		die
+	fi
+}
+
+src_configure() {
+	NATIVE_LIBDIR=$(get_libdir)
+	cmake-multilib_src_configure
+}
+
+multilib_src_configure() {
+	local cxxabi cxxabi_incs
+	if use libcxxabi; then
+		cxxabi=libcxxabi
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
+	elif use libcxxrt; then
+		cxxabi=libcxxrt
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxrt"
+	else
+		local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
+		cxxabi=libsupc++
+		cxxabi_incs="${gcc_inc};${gcc_inc}/${CHOST}"
+	fi
+
+	# we want -lgcc_s for unwinder, and for compiler runtime when using
+	# gcc, clang with gcc runtime (or any unknown compiler)
+	local extra_libs=() want_gcc_s=ON
+	if use libunwind; then
+		# work-around missing -lunwind upstream
+		extra_libs+=( -lunwind )
+		# if we're using libunwind and clang with compiler-rt, we want
+		# to link to compiler-rt instead of -lgcc_s
+		if tc-is-clang; then
+			# get the full library list out of 'pretend mode'
+			# and grep it for libclang_rt references
+			local args=( $($(tc-getCC) -### -x c - 2>&1 | tail -n 1) )
+			local i
+			for i in "${args[@]}"; do
+				if [[ ${i} == *libclang_rt* ]]; then
+					want_gcc_s=OFF
+					extra_libs+=( "${i}" )
+				fi
+			done
+		fi
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		# LLVM_LIBDIR_SUFFIX is used to find CMake files
+		# and we are happy to use the native set
+		-DLLVM_LIBDIR_SUFFIX=${NATIVE_LIBDIR#lib}
+		-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=$(usex static-libs)
+		-DLIBCXX_CXX_ABI=${cxxabi}
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=${cxxabi_incs}
+		# we're using our own mechanism for generating linker scripts
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
+		-DLIBCXX_INCLUDE_TESTS=$(usex test)
+		-DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}"
+	)
+
+	if use test; then
+		mycmakeargs+=(
+			# this can be any directory, it just needs to exist...
+			-DLLVM_MAIN_SRC_DIR="${T}"
+			-DLIT_COMMAND="${EPREFIX}"/usr/bin/lit
+		)
+	fi
+	cmake-utils_src_configure
+}
+
+multilib_src_test() {
+	local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
+
+	[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
+	sed -i -e "/cxx_under_test/s^\".*\"^\"${clang_path}\"^" test/lit.site.cfg || die
+
+	cmake-utils_src_make check-libcxx
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
+	[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
+
+	cat <<-END_LDSCRIPT
+/* GNU ld script
+   Include missing dependencies
+*/
+${output_format}
+GROUP ( $@ )
+END_LDSCRIPT
+}
+
+gen_static_ldscript() {
+	local libdir=$(get_libdir)
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.a" "$(usex libcxxrt "libcxxrt.a" "libsupc++.a")")
+
+	# Move it first.
+	mv "${ED}/usr/${libdir}/libc++.a" "${ED}/usr/${libdir}/libc++_static.a" || die
+	# Generate libc++.a ldscript for inclusion of its dependencies so that
+	# clang++ -stdlib=libc++ -static works out of the box.
+	local deps="libc++_static.a ${cxxabi_lib} $(usex libunwind libunwind.a libgcc_eh.a)"
+	# On Linux/glibc it does not link without libpthread or libdl. It is
+	# fine on FreeBSD.
+	use elibc_glibc && deps+=" libpthread.a libdl.a"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.a" || die
+}
+
+gen_shared_ldscript() {
+	local libdir=$(get_libdir)
+	# libsupc++ doesn't have a shared version
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.so" "$(usex libcxxrt "libcxxrt.so" "libsupc++.a")")
+
+	mv "${ED}/usr/${libdir}/libc++.so" "${ED}/usr/${libdir}/libc++_shared.so" || die
+	local deps="libc++_shared.so ${cxxabi_lib} $(usex libunwind libunwind.so libgcc_s.so)"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.so" || die
+}
+
+multilib_src_install() {
+	cmake-utils_src_install
+	gen_shared_ldscript
+	use static-libs && gen_static_ldscript
+}
+
+pkg_postinst() {
+	elog "This package (${PN}) is mainly intended as a replacement for the C++"
+	elog "standard library when using clang."
+	elog "To use it, instead of libstdc++, use:"
+	elog "    clang++ -stdlib=libc++"
+	elog "to compile your C++ programs."
+}
diff --git a/sys-libs/libcxx/libcxx-4.0.1.ebuild b/sys-libs/libcxx/libcxx-4.0.1.ebuild
new file mode 100644
index 000000000000..43a14f9abb6b
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-4.0.1.ebuild
@@ -0,0 +1,199 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+# Ninja provides better scalability and cleaner verbose output, and is used
+# throughout all LLVM projects.
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+# (needed due to CMAKE_BUILD_TYPE != Gentoo)
+CMAKE_MIN_VERSION=3.7.0-r1
+PYTHON_COMPAT=( python2_7 )
+
+inherit cmake-multilib llvm python-any-r1 toolchain-funcs
+
+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
+HOMEPAGE="https://libcxx.llvm.org/"
+SRC_URI="https://releases.llvm.org/${PV/_//}/${P/_/}.src.tar.xz"
+
+LICENSE="|| ( UoI-NCSA MIT )"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64 ~x86"
+IUSE="elibc_glibc elibc_musl +libcxxabi libcxxrt +libunwind +static-libs test"
+REQUIRED_USE="libunwind? ( || ( libcxxabi libcxxrt ) )
+	?? ( libcxxabi libcxxrt )"
+
+RDEPEND="
+	libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	libcxxrt? ( sys-libs/libcxxrt[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	!libcxxabi? ( !libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] ) )"
+# LLVM 4 required for llvm-config --cmakedir
+# clang-3.9.0 installs necessary target symlinks unconditionally
+# which removes the need for MULTILIB_USEDEP
+DEPEND="${RDEPEND}
+	test? ( >=sys-devel/clang-3.9.0
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') )
+	app-arch/xz-utils
+	>=sys-devel/llvm-4"
+
+S=${WORKDIR}/${P/_/}.src
+
+DOCS=( CREDITS.TXT )
+
+PATCHES=(
+	# Add link flag "-Wl,-z,defs" to avoid underlinking; this is needed in a
+	# out-of-tree build.
+	"${FILESDIR}/${PN}-3.9-cmake-link-flags.patch"
+)
+
+# least intrusive of all
+CMAKE_BUILD_TYPE=RelWithDebInfo
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	llvm_pkg_setup
+	use test && python-any-r1_pkg_setup
+
+	if ! use libcxxabi && ! use libcxxrt && ! tc-is-gcc ; then
+		eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
+		eerror "compilers are not supported. Please set CC=gcc and CXX=g++"
+		eerror "and try again."
+		die
+	fi
+	if tc-is-gcc && [[ $(gcc-version) < 4.7 ]] ; then
+		eerror "${PN} needs to be built with gcc-4.7 or later (or other"
+		eerror "conformant compilers). Please use gcc-config to switch to"
+		eerror "gcc-4.7 or later version."
+		die
+	fi
+}
+
+multilib_src_configure() {
+	local cxxabi cxxabi_incs
+	if use libcxxabi; then
+		cxxabi=libcxxabi
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
+	elif use libcxxrt; then
+		cxxabi=libcxxrt
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxrt"
+	else
+		local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
+		cxxabi=libsupc++
+		cxxabi_incs="${gcc_inc};${gcc_inc}/${CHOST}"
+	fi
+
+	# we want -lgcc_s for unwinder, and for compiler runtime when using
+	# gcc, clang with gcc runtime (or any unknown compiler)
+	local extra_libs=() want_gcc_s=ON
+	if use libunwind; then
+		# work-around missing -lunwind upstream
+		extra_libs+=( -lunwind )
+		# if we're using libunwind and clang with compiler-rt, we want
+		# to link to compiler-rt instead of -lgcc_s
+		if tc-is-clang; then
+			# get the full library list out of 'pretend mode'
+			# and grep it for libclang_rt references
+			local args=( $($(tc-getCC) -### -x c - 2>&1 | tail -n 1) )
+			local i
+			for i in "${args[@]}"; do
+				if [[ ${i} == *libclang_rt* ]]; then
+					want_gcc_s=OFF
+					extra_libs+=( "${i}" )
+				fi
+			done
+		fi
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=$(usex static-libs)
+		-DLIBCXX_CXX_ABI=${cxxabi}
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=${cxxabi_incs}
+		# we're using our own mechanism for generating linker scripts
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
+		-DLIBCXX_INCLUDE_TESTS=$(usex test)
+		-DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}"
+	)
+
+	if use test; then
+		mycmakeargs+=(
+			# this can be any directory, it just needs to exist...
+			# FIXME: remove this once https://reviews.llvm.org/D25093 is merged
+			-DLLVM_MAIN_SRC_DIR="${T}"
+			-DLIT_COMMAND="${EPREFIX}"/usr/bin/lit
+		)
+	fi
+	cmake-utils_src_configure
+}
+
+multilib_src_test() {
+	local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
+
+	[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
+	sed -i -e "/cxx_under_test/s^\".*\"^\"${clang_path}\"^" test/lit.site.cfg || die
+
+	cmake-utils_src_make check-libcxx
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
+	[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
+
+	cat <<-END_LDSCRIPT
+/* GNU ld script
+   Include missing dependencies
+*/
+${output_format}
+GROUP ( $@ )
+END_LDSCRIPT
+}
+
+gen_static_ldscript() {
+	local libdir=$(get_libdir)
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.a" "$(usex libcxxrt "libcxxrt.a" "libsupc++.a")")
+
+	# Move it first.
+	mv "${ED}/usr/${libdir}/libc++.a" "${ED}/usr/${libdir}/libc++_static.a" || die
+	# Generate libc++.a ldscript for inclusion of its dependencies so that
+	# clang++ -stdlib=libc++ -static works out of the box.
+	local deps="libc++_static.a ${cxxabi_lib} $(usex libunwind libunwind.a libgcc_eh.a)"
+	# On Linux/glibc it does not link without libpthread or libdl. It is
+	# fine on FreeBSD.
+	use elibc_glibc && deps+=" libpthread.a libdl.a"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.a" || die
+}
+
+gen_shared_ldscript() {
+	local libdir=$(get_libdir)
+	# libsupc++ doesn't have a shared version
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.so" "$(usex libcxxrt "libcxxrt.so" "libsupc++.a")")
+
+	mv "${ED}/usr/${libdir}/libc++.so" "${ED}/usr/${libdir}/libc++_shared.so" || die
+	local deps="libc++_shared.so ${cxxabi_lib} $(usex libunwind libunwind.so libgcc_s.so)"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.so" || die
+}
+
+multilib_src_install() {
+	cmake-utils_src_install
+	gen_shared_ldscript
+	use static-libs && gen_static_ldscript
+}
+
+pkg_postinst() {
+	elog "This package (${PN}) is mainly intended as a replacement for the C++"
+	elog "standard library when using clang."
+	elog "To use it, instead of libstdc++, use:"
+	elog "    clang++ -stdlib=libc++"
+	elog "to compile your C++ programs."
+}
diff --git a/sys-libs/libcxx/libcxx-5.0.0.ebuild b/sys-libs/libcxx/libcxx-5.0.0.ebuild
new file mode 100644
index 000000000000..43a14f9abb6b
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-5.0.0.ebuild
@@ -0,0 +1,199 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+# Ninja provides better scalability and cleaner verbose output, and is used
+# throughout all LLVM projects.
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+# (needed due to CMAKE_BUILD_TYPE != Gentoo)
+CMAKE_MIN_VERSION=3.7.0-r1
+PYTHON_COMPAT=( python2_7 )
+
+inherit cmake-multilib llvm python-any-r1 toolchain-funcs
+
+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
+HOMEPAGE="https://libcxx.llvm.org/"
+SRC_URI="https://releases.llvm.org/${PV/_//}/${P/_/}.src.tar.xz"
+
+LICENSE="|| ( UoI-NCSA MIT )"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64 ~x86"
+IUSE="elibc_glibc elibc_musl +libcxxabi libcxxrt +libunwind +static-libs test"
+REQUIRED_USE="libunwind? ( || ( libcxxabi libcxxrt ) )
+	?? ( libcxxabi libcxxrt )"
+
+RDEPEND="
+	libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	libcxxrt? ( sys-libs/libcxxrt[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	!libcxxabi? ( !libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] ) )"
+# LLVM 4 required for llvm-config --cmakedir
+# clang-3.9.0 installs necessary target symlinks unconditionally
+# which removes the need for MULTILIB_USEDEP
+DEPEND="${RDEPEND}
+	test? ( >=sys-devel/clang-3.9.0
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') )
+	app-arch/xz-utils
+	>=sys-devel/llvm-4"
+
+S=${WORKDIR}/${P/_/}.src
+
+DOCS=( CREDITS.TXT )
+
+PATCHES=(
+	# Add link flag "-Wl,-z,defs" to avoid underlinking; this is needed in a
+	# out-of-tree build.
+	"${FILESDIR}/${PN}-3.9-cmake-link-flags.patch"
+)
+
+# least intrusive of all
+CMAKE_BUILD_TYPE=RelWithDebInfo
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	llvm_pkg_setup
+	use test && python-any-r1_pkg_setup
+
+	if ! use libcxxabi && ! use libcxxrt && ! tc-is-gcc ; then
+		eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
+		eerror "compilers are not supported. Please set CC=gcc and CXX=g++"
+		eerror "and try again."
+		die
+	fi
+	if tc-is-gcc && [[ $(gcc-version) < 4.7 ]] ; then
+		eerror "${PN} needs to be built with gcc-4.7 or later (or other"
+		eerror "conformant compilers). Please use gcc-config to switch to"
+		eerror "gcc-4.7 or later version."
+		die
+	fi
+}
+
+multilib_src_configure() {
+	local cxxabi cxxabi_incs
+	if use libcxxabi; then
+		cxxabi=libcxxabi
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
+	elif use libcxxrt; then
+		cxxabi=libcxxrt
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxrt"
+	else
+		local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
+		cxxabi=libsupc++
+		cxxabi_incs="${gcc_inc};${gcc_inc}/${CHOST}"
+	fi
+
+	# we want -lgcc_s for unwinder, and for compiler runtime when using
+	# gcc, clang with gcc runtime (or any unknown compiler)
+	local extra_libs=() want_gcc_s=ON
+	if use libunwind; then
+		# work-around missing -lunwind upstream
+		extra_libs+=( -lunwind )
+		# if we're using libunwind and clang with compiler-rt, we want
+		# to link to compiler-rt instead of -lgcc_s
+		if tc-is-clang; then
+			# get the full library list out of 'pretend mode'
+			# and grep it for libclang_rt references
+			local args=( $($(tc-getCC) -### -x c - 2>&1 | tail -n 1) )
+			local i
+			for i in "${args[@]}"; do
+				if [[ ${i} == *libclang_rt* ]]; then
+					want_gcc_s=OFF
+					extra_libs+=( "${i}" )
+				fi
+			done
+		fi
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=$(usex static-libs)
+		-DLIBCXX_CXX_ABI=${cxxabi}
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=${cxxabi_incs}
+		# we're using our own mechanism for generating linker scripts
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
+		-DLIBCXX_INCLUDE_TESTS=$(usex test)
+		-DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}"
+	)
+
+	if use test; then
+		mycmakeargs+=(
+			# this can be any directory, it just needs to exist...
+			# FIXME: remove this once https://reviews.llvm.org/D25093 is merged
+			-DLLVM_MAIN_SRC_DIR="${T}"
+			-DLIT_COMMAND="${EPREFIX}"/usr/bin/lit
+		)
+	fi
+	cmake-utils_src_configure
+}
+
+multilib_src_test() {
+	local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
+
+	[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
+	sed -i -e "/cxx_under_test/s^\".*\"^\"${clang_path}\"^" test/lit.site.cfg || die
+
+	cmake-utils_src_make check-libcxx
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
+	[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
+
+	cat <<-END_LDSCRIPT
+/* GNU ld script
+   Include missing dependencies
+*/
+${output_format}
+GROUP ( $@ )
+END_LDSCRIPT
+}
+
+gen_static_ldscript() {
+	local libdir=$(get_libdir)
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.a" "$(usex libcxxrt "libcxxrt.a" "libsupc++.a")")
+
+	# Move it first.
+	mv "${ED}/usr/${libdir}/libc++.a" "${ED}/usr/${libdir}/libc++_static.a" || die
+	# Generate libc++.a ldscript for inclusion of its dependencies so that
+	# clang++ -stdlib=libc++ -static works out of the box.
+	local deps="libc++_static.a ${cxxabi_lib} $(usex libunwind libunwind.a libgcc_eh.a)"
+	# On Linux/glibc it does not link without libpthread or libdl. It is
+	# fine on FreeBSD.
+	use elibc_glibc && deps+=" libpthread.a libdl.a"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.a" || die
+}
+
+gen_shared_ldscript() {
+	local libdir=$(get_libdir)
+	# libsupc++ doesn't have a shared version
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.so" "$(usex libcxxrt "libcxxrt.so" "libsupc++.a")")
+
+	mv "${ED}/usr/${libdir}/libc++.so" "${ED}/usr/${libdir}/libc++_shared.so" || die
+	local deps="libc++_shared.so ${cxxabi_lib} $(usex libunwind libunwind.so libgcc_s.so)"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.so" || die
+}
+
+multilib_src_install() {
+	cmake-utils_src_install
+	gen_shared_ldscript
+	use static-libs && gen_static_ldscript
+}
+
+pkg_postinst() {
+	elog "This package (${PN}) is mainly intended as a replacement for the C++"
+	elog "standard library when using clang."
+	elog "To use it, instead of libstdc++, use:"
+	elog "    clang++ -stdlib=libc++"
+	elog "to compile your C++ programs."
+}
diff --git a/sys-libs/libcxx/libcxx-5.0.9999.ebuild b/sys-libs/libcxx/libcxx-5.0.9999.ebuild
new file mode 100644
index 000000000000..fde85c232023
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-5.0.9999.ebuild
@@ -0,0 +1,211 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+# Ninja provides better scalability and cleaner verbose output, and is used
+# throughout all LLVM projects.
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+# (needed due to CMAKE_BUILD_TYPE != Gentoo)
+CMAKE_MIN_VERSION=3.7.0-r1
+EGIT_REPO_URI="https://git.llvm.org/git/libcxx.git
+	https://github.com/llvm-mirror/libcxx.git"
+EGIT_BRANCH="release_50"
+PYTHON_COMPAT=( python2_7 )
+
+[[ ${PV} == *9999 ]] && SCM="git-r3" || SCM=""
+
+inherit ${SCM} cmake-multilib llvm python-any-r1 toolchain-funcs
+
+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
+HOMEPAGE="https://libcxx.llvm.org/"
+if [[ ${PV} != *9999 ]] ; then
+	SRC_URI="https://llvm.org/releases/${PV}/${P}.src.tar.xz"
+	S="${WORKDIR}/${P}.src"
+else
+	SRC_URI=""
+fi
+
+LICENSE="|| ( UoI-NCSA MIT )"
+SLOT="0"
+if [[ ${PV} != *9999 ]] ; then
+	KEYWORDS="~amd64 ~x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux"
+else
+	KEYWORDS=""
+fi
+IUSE="elibc_glibc elibc_musl +libcxxabi libcxxrt +libunwind +static-libs test"
+REQUIRED_USE="libunwind? ( || ( libcxxabi libcxxrt ) )
+	?? ( libcxxabi libcxxrt )"
+
+RDEPEND="
+	libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	libcxxrt? ( sys-libs/libcxxrt[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	!libcxxabi? ( !libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] ) )"
+# LLVM 4 required for llvm-config --cmakedir
+# clang-3.9.0 installs necessary target symlinks unconditionally
+# which removes the need for MULTILIB_USEDEP
+DEPEND="${RDEPEND}
+	test? ( >=sys-devel/clang-3.9.0
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') )
+	app-arch/xz-utils
+	>=sys-devel/llvm-4"
+
+DOCS=( CREDITS.TXT )
+
+PATCHES=(
+	# Add link flag "-Wl,-z,defs" to avoid underlinking; this is needed in a
+	# out-of-tree build.
+	"${FILESDIR}/${PN}-3.9-cmake-link-flags.patch"
+)
+
+# least intrusive of all
+CMAKE_BUILD_TYPE=RelWithDebInfo
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	llvm_pkg_setup
+	use test && python-any-r1_pkg_setup
+
+	if ! use libcxxabi && ! use libcxxrt && ! tc-is-gcc ; then
+		eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
+		eerror "compilers are not supported. Please set CC=gcc and CXX=g++"
+		eerror "and try again."
+		die
+	fi
+	if tc-is-gcc && [[ $(gcc-version) < 4.7 ]] ; then
+		eerror "${PN} needs to be built with gcc-4.7 or later (or other"
+		eerror "conformant compilers). Please use gcc-config to switch to"
+		eerror "gcc-4.7 or later version."
+		die
+	fi
+}
+
+multilib_src_configure() {
+	local cxxabi cxxabi_incs
+	if use libcxxabi; then
+		cxxabi=libcxxabi
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
+	elif use libcxxrt; then
+		cxxabi=libcxxrt
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxrt"
+	else
+		local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
+		cxxabi=libsupc++
+		cxxabi_incs="${gcc_inc};${gcc_inc}/${CHOST}"
+	fi
+
+	# we want -lgcc_s for unwinder, and for compiler runtime when using
+	# gcc, clang with gcc runtime (or any unknown compiler)
+	local extra_libs=() want_gcc_s=ON
+	if use libunwind; then
+		# work-around missing -lunwind upstream
+		extra_libs+=( -lunwind )
+		# if we're using libunwind and clang with compiler-rt, we want
+		# to link to compiler-rt instead of -lgcc_s
+		if tc-is-clang; then
+			# get the full library list out of 'pretend mode'
+			# and grep it for libclang_rt references
+			local args=( $($(tc-getCC) -### -x c - 2>&1 | tail -n 1) )
+			local i
+			for i in "${args[@]}"; do
+				if [[ ${i} == *libclang_rt* ]]; then
+					want_gcc_s=OFF
+					extra_libs+=( "${i}" )
+				fi
+			done
+		fi
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=$(usex static-libs)
+		-DLIBCXX_CXX_ABI=${cxxabi}
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=${cxxabi_incs}
+		# we're using our own mechanism for generating linker scripts
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
+		-DLIBCXX_INCLUDE_TESTS=$(usex test)
+		-DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}"
+	)
+
+	if use test; then
+		mycmakeargs+=(
+			# this can be any directory, it just needs to exist...
+			# FIXME: remove this once https://reviews.llvm.org/D25093 is merged
+			-DLLVM_MAIN_SRC_DIR="${T}"
+			-DLIT_COMMAND="${EPREFIX}"/usr/bin/lit
+		)
+	fi
+	cmake-utils_src_configure
+}
+
+multilib_src_test() {
+	local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
+
+	[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
+	sed -i -e "/cxx_under_test/s^\".*\"^\"${clang_path}\"^" test/lit.site.cfg || die
+
+	cmake-utils_src_make check-libcxx
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
+	[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
+
+	cat <<-END_LDSCRIPT
+/* GNU ld script
+   Include missing dependencies
+*/
+${output_format}
+GROUP ( $@ )
+END_LDSCRIPT
+}
+
+gen_static_ldscript() {
+	local libdir=$(get_libdir)
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.a" "$(usex libcxxrt "libcxxrt.a" "libsupc++.a")")
+
+	# Move it first.
+	mv "${ED}/usr/${libdir}/libc++.a" "${ED}/usr/${libdir}/libc++_static.a" || die
+	# Generate libc++.a ldscript for inclusion of its dependencies so that
+	# clang++ -stdlib=libc++ -static works out of the box.
+	local deps="libc++_static.a ${cxxabi_lib} $(usex libunwind libunwind.a libgcc_eh.a)"
+	# On Linux/glibc it does not link without libpthread or libdl. It is
+	# fine on FreeBSD.
+	use elibc_glibc && deps+=" libpthread.a libdl.a"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.a" || die
+}
+
+gen_shared_ldscript() {
+	local libdir=$(get_libdir)
+	# libsupc++ doesn't have a shared version
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.so" "$(usex libcxxrt "libcxxrt.so" "libsupc++.a")")
+
+	mv "${ED}/usr/${libdir}/libc++.so" "${ED}/usr/${libdir}/libc++_shared.so" || die
+	local deps="libc++_shared.so ${cxxabi_lib} $(usex libunwind libunwind.so libgcc_s.so)"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.so" || die
+}
+
+multilib_src_install() {
+	cmake-utils_src_install
+	gen_shared_ldscript
+	use static-libs && gen_static_ldscript
+}
+
+pkg_postinst() {
+	elog "This package (${PN}) is mainly intended as a replacement for the C++"
+	elog "standard library when using clang."
+	elog "To use it, instead of libstdc++, use:"
+	elog "    clang++ -stdlib=libc++"
+	elog "to compile your C++ programs."
+}
diff --git a/sys-libs/libcxx/libcxx-9999.ebuild b/sys-libs/libcxx/libcxx-9999.ebuild
new file mode 100644
index 000000000000..17104067dfdc
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-9999.ebuild
@@ -0,0 +1,208 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+# Ninja provides better scalability and cleaner verbose output, and is used
+# throughout all LLVM projects.
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+# (needed due to CMAKE_BUILD_TYPE != Gentoo)
+CMAKE_MIN_VERSION=3.7.0-r1
+EGIT_REPO_URI="https://git.llvm.org/git/libcxx.git
+	https://github.com/llvm-mirror/libcxx.git"
+PYTHON_COMPAT=( python2_7 )
+
+[[ ${PV} == 9999 ]] && SCM="git-r3" || SCM=""
+
+inherit ${SCM} cmake-multilib llvm python-any-r1 toolchain-funcs
+
+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
+HOMEPAGE="https://libcxx.llvm.org/"
+if [[ ${PV} != 9999 ]] ; then
+	SRC_URI="https://llvm.org/releases/${PV}/${P}.src.tar.xz"
+	S="${WORKDIR}/${P}.src"
+else
+	SRC_URI=""
+fi
+
+LICENSE="|| ( UoI-NCSA MIT )"
+SLOT="0"
+if [[ ${PV} != 9999 ]] ; then
+	KEYWORDS="~amd64 ~x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux"
+else
+	KEYWORDS=""
+fi
+IUSE="elibc_glibc elibc_musl +libcxxabi libcxxrt +libunwind +static-libs test"
+REQUIRED_USE="libunwind? ( || ( libcxxabi libcxxrt ) )
+	?? ( libcxxabi libcxxrt )"
+
+RDEPEND="
+	libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	libcxxrt? ( sys-libs/libcxxrt[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	!libcxxabi? ( !libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] ) )"
+# LLVM 4 required for llvm-config --cmakedir
+# clang-3.9.0 installs necessary target symlinks unconditionally
+# which removes the need for MULTILIB_USEDEP
+DEPEND="${RDEPEND}
+	test? ( >=sys-devel/clang-3.9.0
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') )
+	app-arch/xz-utils
+	>=sys-devel/llvm-4"
+
+DOCS=( CREDITS.TXT )
+
+PATCHES=(
+	# Add link flag "-Wl,-z,defs" to avoid underlinking; this is needed in a
+	# out-of-tree build.
+	"${FILESDIR}/${PN}-3.9-cmake-link-flags.patch"
+)
+
+# least intrusive of all
+CMAKE_BUILD_TYPE=RelWithDebInfo
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	llvm_pkg_setup
+	use test && python-any-r1_pkg_setup
+
+	if ! use libcxxabi && ! use libcxxrt && ! tc-is-gcc ; then
+		eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
+		eerror "compilers are not supported. Please set CC=gcc and CXX=g++"
+		eerror "and try again."
+		die
+	fi
+	if tc-is-gcc && [[ $(gcc-version) < 4.7 ]] ; then
+		eerror "${PN} needs to be built with gcc-4.7 or later (or other"
+		eerror "conformant compilers). Please use gcc-config to switch to"
+		eerror "gcc-4.7 or later version."
+		die
+	fi
+}
+
+multilib_src_configure() {
+	local cxxabi cxxabi_incs
+	if use libcxxabi; then
+		cxxabi=libcxxabi
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
+	elif use libcxxrt; then
+		cxxabi=libcxxrt
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxrt"
+	else
+		local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
+		cxxabi=libsupc++
+		cxxabi_incs="${gcc_inc};${gcc_inc}/${CHOST}"
+	fi
+
+	# we want -lgcc_s for unwinder, and for compiler runtime when using
+	# gcc, clang with gcc runtime (or any unknown compiler)
+	local extra_libs=() want_gcc_s=ON
+	if use libunwind; then
+		# work-around missing -lunwind upstream
+		extra_libs+=( -lunwind )
+		# if we're using libunwind and clang with compiler-rt, we want
+		# to link to compiler-rt instead of -lgcc_s
+		if tc-is-clang; then
+			# get the full library list out of 'pretend mode'
+			# and grep it for libclang_rt references
+			local args=( $($(tc-getCC) -### -x c - 2>&1 | tail -n 1) )
+			local i
+			for i in "${args[@]}"; do
+				if [[ ${i} == *libclang_rt* ]]; then
+					want_gcc_s=OFF
+					extra_libs+=( "${i}" )
+				fi
+			done
+		fi
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=$(usex static-libs)
+		-DLIBCXX_CXX_ABI=${cxxabi}
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=${cxxabi_incs}
+		# we're using our own mechanism for generating linker scripts
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
+		-DLIBCXX_INCLUDE_TESTS=$(usex test)
+		-DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}"
+	)
+
+	if use test; then
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="-vv"
+		)
+	fi
+	cmake-utils_src_configure
+}
+
+multilib_src_test() {
+	local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
+
+	[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
+	sed -i -e "/cxx_under_test/s^\".*\"^\"${clang_path}\"^" test/lit.site.cfg || die
+
+	cmake-utils_src_make check-libcxx
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
+	[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
+
+	cat <<-END_LDSCRIPT
+/* GNU ld script
+   Include missing dependencies
+*/
+${output_format}
+GROUP ( $@ )
+END_LDSCRIPT
+}
+
+gen_static_ldscript() {
+	local libdir=$(get_libdir)
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.a" "$(usex libcxxrt "libcxxrt.a" "libsupc++.a")")
+
+	# Move it first.
+	mv "${ED}/usr/${libdir}/libc++.a" "${ED}/usr/${libdir}/libc++_static.a" || die
+	# Generate libc++.a ldscript for inclusion of its dependencies so that
+	# clang++ -stdlib=libc++ -static works out of the box.
+	local deps="libc++_static.a ${cxxabi_lib} $(usex libunwind libunwind.a libgcc_eh.a)"
+	# On Linux/glibc it does not link without libpthread or libdl. It is
+	# fine on FreeBSD.
+	use elibc_glibc && deps+=" libpthread.a libdl.a"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.a" || die
+}
+
+gen_shared_ldscript() {
+	local libdir=$(get_libdir)
+	# libsupc++ doesn't have a shared version
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.so" "$(usex libcxxrt "libcxxrt.so" "libsupc++.a")")
+
+	mv "${ED}/usr/${libdir}/libc++.so" "${ED}/usr/${libdir}/libc++_shared.so" || die
+	local deps="libc++_shared.so ${cxxabi_lib} $(usex libunwind libunwind.so libgcc_s.so)"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.so" || die
+}
+
+multilib_src_install() {
+	cmake-utils_src_install
+	gen_shared_ldscript
+	use static-libs && gen_static_ldscript
+}
+
+pkg_postinst() {
+	elog "This package (${PN}) is mainly intended as a replacement for the C++"
+	elog "standard library when using clang."
+	elog "To use it, instead of libstdc++, use:"
+	elog "    clang++ -stdlib=libc++"
+	elog "to compile your C++ programs."
+}
diff --git a/sys-libs/libcxx/metadata.xml b/sys-libs/libcxx/metadata.xml
new file mode 100644
index 000000000000..df0c52dcfcdf
--- /dev/null
+++ b/sys-libs/libcxx/metadata.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>aballier@gentoo.org</email>
+		<name>Alexis Ballier</name>
+	</maintainer>
+	<maintainer type="project">
+		<email>bsd@gentoo.org</email>
+		<name>BSD Project</name>
+	</maintainer>
+	<maintainer type="project">
+		<email>llvm@gentoo.org</email>
+		<name>LLVM Project</name>
+	</maintainer>
+	<use>
+		<flag name="libcxxabi">Build on top of <pkg>sys-libs/libcxxabi</pkg> instead of gcc's libsupc++ (avoids depending on gcc).</flag>
+		<flag name="libcxxrt">Build on top of <pkg>sys-libs/libcxxrt</pkg> instead of gcc's libsupc++ (avoids depending on gcc).</flag>
+		<flag name="libunwind">Use libunwind instead of libgcc_s for stack unwinding, thus avoiding dependence on gcc.</flag>
+	</use>
+</pkgmetadata>
author	V3n3RiX <venerix@redcorelinux.org>	2017-10-09 18:53:29 +0100
committer	V3n3RiX <venerix@redcorelinux.org>	2017-10-09 18:53:29 +0100
commit	4f2d7949f03e1c198bc888f2d05f421d35c57e21 (patch)
tree	ba5f07bf3f9d22d82e54a462313f5d244036c768 /sys-libs/libcxx