app-arch: Import from Gentoo

An updated systemd will need it.

sdk_container/src/third_party/portage-stable/app-arch/zstd/Manifest

@@ -0,0 +1,2 @@
+DIST zstd-1.4.4.tar.gz 1962617 BLAKE2B e21841a53b6c60703e5500cfc2a02923c4c3e57975aa57e1060310171e0d83d7c8eda1bd0510d5736db5c310d76847d2105ac5f614867fc3a9dc3086a035dfd7 SHA512 8209837e8eb14e474dfe21d5511085f46cef93b03ab77613fd41e7b8be652418231c38852669c8e0b55b78ad41ea2cb8008d0da122a83f8f27e32b5c86f045cf
+DIST zstd-1.4.5.tar.gz 1987927 BLAKE2B 1497d4e87040e5c71466468ebf1a57f4073666f2b005229925bc1d95a4b4fcb2a51d88bb79be20f21860e5750da42f8aac21d2997421d07ba37bd6bb12a28b55 SHA512 b03c497c3e0590c3d384cb856e3024f144b2bfac0d805d80e68deafa612c68237f12a2d657416d476a28059e80936c79f099fc42331464b417593895ea214387

sdk_container/src/third_party/portage-stable/app-arch/zstd/files/zstd-1.4.4-make43.patch

@@ -0,0 +1,60 @@
+From 06a57cf57e3c4e887cadcf688e3081154f3f6db4 Mon Sep 17 00:00:00 2001
+From: Bimba Shrestha <bimbashrestha@fb.com>
+Date: Thu, 6 Feb 2020 14:10:51 -0800
+Subject: [PATCH] [build-issue] More portable header prefix usage (#) (#1987)
+
+* make 4.3 build issue fix
+
+* Changing header name and adding comment
+---
+ programs/Makefile | 11 +++++++----
+ 1 file changed, 7 insertions(+), 4 deletions(-)
+
+diff --git a/programs/Makefile b/programs/Makefile
+index b75314a8..a9ee3cb5 100644
+--- a/programs/Makefile
++++ b/programs/Makefile
+@@ -94,9 +94,12 @@ endif
+ 
+ VOID = /dev/null
+ 
++# Make 4.3 doesn't support '\#' anymore (https://lwn.net/Articles/810071/)
++NUM_SYMBOL := \#
++
+ # thread detection
+ NO_THREAD_MSG := ==> no threads, building without multithreading support
+-HAVE_PTHREAD := $(shell printf '\#include <pthread.h>\nint main(void) { return 0; }' > have_pthread.c && $(CC) $(FLAGS) -o have_pthread$(EXT) have_pthread.c -pthread 2> $(VOID) && rm have_pthread$(EXT) && echo 1 || echo 0; rm have_pthread.c)
++HAVE_PTHREAD := $(shell printf '$(NUM_SYMBOL)include <pthread.h>\nint main(void) { return 0; }' > have_pthread.c && $(CC) $(FLAGS) -o have_pthread$(EXT) have_pthread.c -pthread 2> $(VOID) && rm have_pthread$(EXT) && echo 1 || echo 0; rm have_pthread.c)
+ HAVE_THREAD := $(shell [ "$(HAVE_PTHREAD)" -eq "1" -o -n "$(filter Windows%,$(OS))" ] && echo 1 || echo 0)
+ ifeq ($(HAVE_THREAD), 1)
+ THREAD_MSG := ==> building with threading support
+@@ -108,7 +111,7 @@ endif
+ 
+ # zlib detection
+ NO_ZLIB_MSG := ==> no zlib, building zstd without .gz support
+-HAVE_ZLIB := $(shell printf '\#include <zlib.h>\nint main(void) { return 0; }' > have_zlib.c && $(CC) $(FLAGS) -o have_zlib$(EXT) have_zlib.c -lz 2> $(VOID) && rm have_zlib$(EXT) && echo 1 || echo 0; rm have_zlib.c)
++HAVE_ZLIB := $(shell printf '$(NUM_SYMBOL)include <zlib.h>\nint main(void) { return 0; }' > have_zlib.c && $(CC) $(FLAGS) -o have_zlib$(EXT) have_zlib.c -lz 2> $(VOID) && rm have_zlib$(EXT) && echo 1 || echo 0; rm have_zlib.c)
+ ifeq ($(HAVE_ZLIB), 1)
+ ZLIB_MSG := ==> building zstd with .gz compression support
+ ZLIBCPP = -DZSTD_GZCOMPRESS -DZSTD_GZDECOMPRESS
+@@ -119,7 +122,7 @@ endif
+ 
+ # lzma detection
+ NO_LZMA_MSG := ==> no liblzma, building zstd without .xz/.lzma support
+-HAVE_LZMA := $(shell printf '\#include <lzma.h>\nint main(void) { return 0; }' > have_lzma.c && $(CC) $(FLAGS) -o have_lzma$(EXT) have_lzma.c -llzma 2> $(VOID) && rm have_lzma$(EXT) && echo 1 || echo 0; rm have_lzma.c)
++HAVE_LZMA := $(shell printf '$(NUM_SYMBOL)include <lzma.h>\nint main(void) { return 0; }' > have_lzma.c && $(CC) $(FLAGS) -o have_lzma$(EXT) have_lzma.c -llzma 2> $(VOID) && rm have_lzma$(EXT) && echo 1 || echo 0; rm have_lzma.c)
+ ifeq ($(HAVE_LZMA), 1)
+ LZMA_MSG := ==> building zstd with .xz/.lzma compression support
+ LZMACPP = -DZSTD_LZMACOMPRESS -DZSTD_LZMADECOMPRESS
+@@ -130,7 +133,7 @@ endif
+ 
+ # lz4 detection
+ NO_LZ4_MSG := ==> no liblz4, building zstd without .lz4 support
+-HAVE_LZ4 := $(shell printf '\#include <lz4frame.h>\n\#include <lz4.h>\nint main(void) { return 0; }' > have_lz4.c && $(CC) $(FLAGS) -o have_lz4$(EXT) have_lz4.c -llz4 2> $(VOID) && rm have_lz4$(EXT) && echo 1 || echo 0; rm have_lz4.c)
++HAVE_LZ4 := $(shell printf '$(NUM_SYMBOL)include <lz4frame.h>\n\#include <lz4.h>\nint main(void) { return 0; }' > have_lz4.c && $(CC) $(FLAGS) -o have_lz4$(EXT) have_lz4.c -llz4 2> $(VOID) && rm have_lz4$(EXT) && echo 1 || echo 0; rm have_lz4.c)
+ ifeq ($(HAVE_LZ4), 1)
+ LZ4_MSG := ==> building zstd with .lz4 compression support
+ LZ4CPP = -DZSTD_LZ4COMPRESS -DZSTD_LZ4DECOMPRESS
+-- 
+2.24.1
+

sdk_container/src/third_party/portage-stable/app-arch/zstd/files/zstd-1.4.4-pkgconfig_libdir.patch

@@ -0,0 +1,215 @@
+From e668c9b52896e1cf92c99da3b01e3bdbbae77100 Mon Sep 17 00:00:00 2001
+From: "W. Felix Handte" <w@felixhandte.com>
+Date: Tue, 18 Feb 2020 10:50:38 -0500
+Subject: [PATCH 1/3] Fix pkg-config File Generation Again
+
+Revises #1851. Fixes #1900. Replaces #1930.
+
+Thanks to @orbea, @neheb, @Polynomial-C, and particularly @eli-schwartz for
+pointing out the problem and suggesting solutions.
+
+Tested with
+
+  ```
+  make -C lib clean libzstd.pc
+  cat lib/libzstd.pc
+
+  # should fail
+  make -C lib clean libzstd.pc     LIBDIR=/foo
+  make -C lib clean libzstd.pc INCLUDEDIR=/foo
+  make -C lib clean libzstd.pc     LIBDIR=/usr/localfoo
+  make -C lib clean libzstd.pc INCLUDEDIR=/usr/localfoo
+  make -C lib clean libzstd.pc     LIBDIR=/usr/local/lib     prefix=/foo
+  make -C lib clean libzstd.pc INCLUDEDIR=/usr/local/include prefix=/foo
+
+  # should succeed
+  make -C lib clean libzstd.pc     LIBDIR=/usr/local/foo
+  make -C lib clean libzstd.pc INCLUDEDIR=/usr/local/foo
+  make -C lib clean libzstd.pc     LIBDIR=/usr/local/
+  make -C lib clean libzstd.pc INCLUDEDIR=/usr/local/
+  make -C lib clean libzstd.pc     LIBDIR=/usr/local
+  make -C lib clean libzstd.pc INCLUDEDIR=/usr/local
+  make -C lib clean libzstd.pc     LIBDIR=/tmp/foo prefix=/tmp
+  make -C lib clean libzstd.pc INCLUDEDIR=/tmp/foo prefix=/tmp
+  make -C lib clean libzstd.pc     LIBDIR=/tmp/foo prefix=/tmp/foo
+  make -C lib clean libzstd.pc INCLUDEDIR=/tmp/foo prefix=/tmp/foo
+
+  # should also succeed
+  make -C lib clean libzstd.pc prefix=/foo LIBDIR=/foo/bar INCLUDEDIR=/foo/
+  cat lib/libzstd.pc
+
+  mkdir out
+  cd out
+  cmake ../build/cmake
+  make
+  cat lib/libzstd.pc
+  ```
+---
+ build/cmake/lib/CMakeLists.txt |  5 +++--
+ lib/Makefile                   | 14 ++++++++++++--
+ lib/libzstd.pc.in              |  4 ++--
+ 3 files changed, 17 insertions(+), 6 deletions(-)
+
+diff --git a/build/cmake/lib/CMakeLists.txt b/build/cmake/lib/CMakeLists.txt
+index e92647bf1..29ff57aa0 100644
+--- a/build/cmake/lib/CMakeLists.txt
++++ b/build/cmake/lib/CMakeLists.txt
+@@ -134,11 +134,12 @@ endif ()
+ if (UNIX)
+     # pkg-config
+     set(PREFIX "${CMAKE_INSTALL_PREFIX}")
+-    set(LIBDIR "${CMAKE_INSTALL_FULL_LIBDIR}")
++    set(LIBDIR "${CMAKE_INSTALL_LIBDIR}")
++    set(INCLUDEDIR "${CMAKE_INSTALL_INCLUDEDIR}")
+     set(VERSION "${zstd_VERSION_MAJOR}.${zstd_VERSION_MINOR}.${zstd_VERSION_PATCH}")
+     add_custom_target(libzstd.pc ALL
+             ${CMAKE_COMMAND} -DIN="${LIBRARY_DIR}/libzstd.pc.in" -DOUT="libzstd.pc"
+-            -DPREFIX="${PREFIX}" -DVERSION="${VERSION}"
++            -DPREFIX="${PREFIX}" -DLIBDIR="${LIBDIR}" -DINCLUDEDIR="${INCLUDEDIR}" -DVERSION="${VERSION}"
+             -P "${CMAKE_CURRENT_SOURCE_DIR}/pkgconfig.cmake"
+             COMMENT "Creating pkg-config file")
+ 
+diff --git a/lib/Makefile b/lib/Makefile
+index fd1710cf1..dbd64994c 100644
+--- a/lib/Makefile
++++ b/lib/Makefile
+@@ -224,6 +224,16 @@ LIBDIR      ?= $(libdir)
+ includedir  ?= $(PREFIX)/include
+ INCLUDEDIR  ?= $(includedir)
+ 
++PCLIBDIR ?= $(shell echo "$(LIBDIR)" | sed -n -e "s@^$(exec_prefix)\\(/\\|$$\\)@@p")
++PCINCDIR ?= $(shell echo "$(INCLUDEDIR)" | sed -n -e "s@^$(prefix)\\(/\\|$$\\)@@p")
++
++ifeq (,$(shell echo "$(LIBDIR)" | sed -n -e "\\@^$(exec_prefix)\\(/\\|$$\\)@ p"))
++$(error configured libdir ($(LIBDIR)) is outside of prefix ($(prefix)), can't generate pkg-config file)
++endif
++ifeq (,$(shell echo "$(INCLUDEDIR)" | sed -n -e "\\@^$(prefix)\\(/\\|$$\\)@ p"))
++$(error configured includedir ($(INCLUDEDIR)) is outside of exec_prefix ($(exec_prefix)), can't generate pkg-config file)
++endif
++
+ ifneq (,$(filter $(shell uname),FreeBSD NetBSD DragonFly))
+ PKGCONFIGDIR ?= $(PREFIX)/libdata/pkgconfig
+ else
+@@ -239,11 +249,11 @@ endif
+ INSTALL_PROGRAM ?= $(INSTALL)
+ INSTALL_DATA    ?= $(INSTALL) -m 644
+ 
+-
+-libzstd.pc:
+ libzstd.pc: libzstd.pc.in
+ 	@echo creating pkgconfig
+ 	@sed -e 's|@PREFIX@|$(PREFIX)|' \
++             -e 's|@LIBDIR@|$(PCLIBDIR)|' \
++             -e 's|@INCLUDEDIR@|$(PCINCDIR)|' \
+              -e 's|@VERSION@|$(VERSION)|' \
+              $< >$@
+ 
+diff --git a/lib/libzstd.pc.in b/lib/libzstd.pc.in
+index e7880be47..8ec0235ad 100644
+--- a/lib/libzstd.pc.in
++++ b/lib/libzstd.pc.in
+@@ -4,8 +4,8 @@
+ 
+ prefix=@PREFIX@
+ exec_prefix=${prefix}
+-includedir=${prefix}/include
+-libdir=${exec_prefix}/lib
++includedir=${prefix}/@INCLUDEDIR@
++libdir=${exec_prefix}/@LIBDIR@
+ 
+ Name: zstd
+ Description: fast lossless compression algorithm library
+
+From 73737231b95976f24b7b9bff96240976b11dcce0 Mon Sep 17 00:00:00 2001
+From: "W. Felix Handte" <w@felixhandte.com>
+Date: Tue, 18 Feb 2020 13:17:17 -0500
+Subject: [PATCH 2/3] Allow Manual Overriding of pkg-config Lib and Include
+ Dirs
+
+When the `PCLIBDIR` or `PCINCDIR` is non-empty (either because we succeeded
+in removing the prefix, or because it was manually set), we don't need to
+perform the check. This lets us trust users who go to the trouble of setting
+a manual override, rather than still blindly failing the make.
+
+They'll still be prefixed with `${prefix}/` / `${exec_prefix}/` in the
+pkg-config file though.
+---
+ lib/Makefile | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/lib/Makefile b/lib/Makefile
+index dbd64994c..b067c11a2 100644
+--- a/lib/Makefile
++++ b/lib/Makefile
+@@ -227,12 +227,21 @@ INCLUDEDIR  ?= $(includedir)
+ PCLIBDIR ?= $(shell echo "$(LIBDIR)" | sed -n -e "s@^$(exec_prefix)\\(/\\|$$\\)@@p")
+ PCINCDIR ?= $(shell echo "$(INCLUDEDIR)" | sed -n -e "s@^$(prefix)\\(/\\|$$\\)@@p")
+ 
++ifeq (,$(PCLIBDIR))
++# Additional prefix check is required, since the empty string is technically a
++# valid PCLIBDIR
+ ifeq (,$(shell echo "$(LIBDIR)" | sed -n -e "\\@^$(exec_prefix)\\(/\\|$$\\)@ p"))
+ $(error configured libdir ($(LIBDIR)) is outside of prefix ($(prefix)), can't generate pkg-config file)
+ endif
++endif
++
++ifeq (,$(PCINCDIR))
++# Additional prefix check is required, since the empty string is technically a
++# valid PCINCDIR
+ ifeq (,$(shell echo "$(INCLUDEDIR)" | sed -n -e "\\@^$(prefix)\\(/\\|$$\\)@ p"))
+ $(error configured includedir ($(INCLUDEDIR)) is outside of exec_prefix ($(exec_prefix)), can't generate pkg-config file)
+ endif
++endif
+ 
+ ifneq (,$(filter $(shell uname),FreeBSD NetBSD DragonFly))
+ PKGCONFIGDIR ?= $(PREFIX)/libdata/pkgconfig
+
+From e5ef935cf6160768e20cd73db3d9450aa8b7f8cf Mon Sep 17 00:00:00 2001
+From: "W. Felix Handte" <w@felixhandte.com>
+Date: Tue, 18 Feb 2020 13:40:58 -0500
+Subject: [PATCH 3/3] Fix Variable Capitalization
+
+---
+ lib/Makefile | 15 ++++++++-------
+ 1 file changed, 8 insertions(+), 7 deletions(-)
+
+diff --git a/lib/Makefile b/lib/Makefile
+index b067c11a2..db35207bb 100644
+--- a/lib/Makefile
++++ b/lib/Makefile
+@@ -219,27 +219,28 @@ DESTDIR     ?=
+ prefix      ?= /usr/local
+ PREFIX      ?= $(prefix)
+ exec_prefix ?= $(PREFIX)
+-libdir      ?= $(exec_prefix)/lib
++EXEC_PREFIX ?= $(exec_prefix)
++libdir      ?= $(EXEC_PREFIX)/lib
+ LIBDIR      ?= $(libdir)
+ includedir  ?= $(PREFIX)/include
+ INCLUDEDIR  ?= $(includedir)
+ 
+-PCLIBDIR ?= $(shell echo "$(LIBDIR)" | sed -n -e "s@^$(exec_prefix)\\(/\\|$$\\)@@p")
+-PCINCDIR ?= $(shell echo "$(INCLUDEDIR)" | sed -n -e "s@^$(prefix)\\(/\\|$$\\)@@p")
++PCLIBDIR ?= $(shell echo "$(LIBDIR)" | sed -n -e "s@^$(EXEC_PREFIX)\\(/\\|$$\\)@@p")
++PCINCDIR ?= $(shell echo "$(INCLUDEDIR)" | sed -n -e "s@^$(PREFIX)\\(/\\|$$\\)@@p")
+ 
+ ifeq (,$(PCLIBDIR))
+ # Additional prefix check is required, since the empty string is technically a
+ # valid PCLIBDIR
+-ifeq (,$(shell echo "$(LIBDIR)" | sed -n -e "\\@^$(exec_prefix)\\(/\\|$$\\)@ p"))
+-$(error configured libdir ($(LIBDIR)) is outside of prefix ($(prefix)), can't generate pkg-config file)
++ifeq (,$(shell echo "$(LIBDIR)" | sed -n -e "\\@^$(EXEC_PREFIX)\\(/\\|$$\\)@ p"))
++$(error configured libdir ($(LIBDIR)) is outside of prefix ($(PREFIX)), can't generate pkg-config file)
+ endif
+ endif
+ 
+ ifeq (,$(PCINCDIR))
+ # Additional prefix check is required, since the empty string is technically a
+ # valid PCINCDIR
+-ifeq (,$(shell echo "$(INCLUDEDIR)" | sed -n -e "\\@^$(prefix)\\(/\\|$$\\)@ p"))
+-$(error configured includedir ($(INCLUDEDIR)) is outside of exec_prefix ($(exec_prefix)), can't generate pkg-config file)
++ifeq (,$(shell echo "$(INCLUDEDIR)" | sed -n -e "\\@^$(PREFIX)\\(/\\|$$\\)@ p"))
++$(error configured includedir ($(INCLUDEDIR)) is outside of exec_prefix ($(EXEC_PREFIX)), can't generate pkg-config file)
+ endif
+ endif
+ 

sdk_container/src/third_party/portage-stable/app-arch/zstd/files/zstd-1.4.5-fix-uclibc-ng.patch

@@ -0,0 +1,28 @@
+From 1dcc4787965aa8f4af48ed5a2154185750bbaff5 Mon Sep 17 00:00:00 2001
+From: Yann Collet <cyan@fb.com>
+Date: Mon, 13 Jul 2020 14:16:33 -0700
+Subject: [PATCH] fix uclibc's st_mtim
+
+reported and suggested by @ewildgoose (#1872)
+---
+ programs/platform.h | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/programs/platform.h b/programs/platform.h
+index 2b4b9f2d8..68be70bb3 100644
+--- a/programs/platform.h
++++ b/programs/platform.h
+@@ -102,6 +102,12 @@ extern "C" {
+ #      define PLATFORM_POSIX_VERSION 1
+ #    endif
+ 
++#    ifdef __UCLIBC__
++#     ifndef __USE_MISC
++#      define __USE_MISC /* enable st_mtim on uclibc */
++#     endif
++#    endif
++
+ #  else  /* non-unix target platform (like Windows) */
+ #    define PLATFORM_POSIX_VERSION 0
+ #  endif
+

sdk_container/src/third_party/portage-stable/app-arch/zstd/metadata.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+  <maintainer type="person">
+    <email>patrick@gentoo.org</email>
+    <name>Patrick Lauer</name>
+  </maintainer>
+  <upstream>
+    <remote-id type="github">facebook/zstd</remote-id>
+  </upstream>
+</pkgmetadata>

sdk_container/src/third_party/portage-stable/app-arch/zstd/zstd-1.4.4-r4.ebuild

@@ -0,0 +1,75 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit flag-o-matic multilib-minimal toolchain-funcs
+
+DESCRIPTION="zstd fast compression library"
+HOMEPAGE="https://facebook.github.io/zstd/"
+SRC_URI="https://github.com/facebook/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="|| ( BSD GPL-2 )"
+SLOT="0/1"
+KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~mips ppc ppc64 ~riscv s390 sparc x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+IUSE="lz4 static-libs +threads"
+
+RDEPEND="app-arch/xz-utils
+	lz4? ( app-arch/lz4 )"
+DEPEND="${RDEPEND}"
+
+PATCHES=(
+	"${FILESDIR}/${P}-pkgconfig_libdir.patch" #700780
+	"${FILESDIR}/${P}-make43.patch" #708110
+	"${FILESDIR}/${PN}-1.4.5-fix-uclibc-ng.patch" #741972
+)
+
+src_prepare() {
+	default
+	multilib_copy_sources
+
+	# Workaround #713940 / https://github.com/facebook/zstd/issues/2045
+	# where upstream build system does not add -pthread for Makefile-based
+	# build system.
+	use threads && append-flags $(test-flags-CCLD -pthread)
+}
+
+mymake() {
+	emake \
+		CC="$(tc-getCC)" \
+		CXX="$(tc-getCXX)" \
+		AR="$(tc-getAR)" \
+		PREFIX="${EPREFIX}/usr" \
+		LIBDIR="${EPREFIX}/usr/$(get_libdir)" \
+		"${@}"
+}
+
+multilib_src_compile() {
+	local libzstd_targets=( libzstd{,.a}$(usex threads '-mt' '') )
+
+	mymake -C lib ${libzstd_targets[@]} libzstd.pc
+
+	if multilib_is_native_abi ; then
+		mymake HAVE_LZ4="$(usex lz4 1 0)" zstd
+
+		mymake -C contrib/pzstd
+	fi
+}
+
+multilib_src_install() {
+	mymake -C lib DESTDIR="${D}" install
+
+	if multilib_is_native_abi ; then
+		mymake -C programs DESTDIR="${D}" install
+
+		mymake -C contrib/pzstd DESTDIR="${D}" install
+	fi
+}
+
+multilib_src_install_all() {
+	einstalldocs
+
+	if ! use static-libs; then
+		find "${ED}" -name "*.a" -delete || die
+	fi
+}

sdk_container/src/third_party/portage-stable/app-arch/zstd/zstd-1.4.5.ebuild

@@ -0,0 +1,73 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit flag-o-matic multilib-minimal toolchain-funcs
+
+DESCRIPTION="zstd fast compression library"
+HOMEPAGE="https://facebook.github.io/zstd/"
+SRC_URI="https://github.com/facebook/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="|| ( BSD GPL-2 )"
+SLOT="0/1"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+IUSE="lz4 static-libs +threads"
+
+RDEPEND="app-arch/xz-utils
+	lz4? ( app-arch/lz4 )"
+DEPEND="${RDEPEND}"
+
+PATCHES=(
+	"${FILESDIR}/${P}-fix-uclibc-ng.patch" #741972
+)
+
+src_prepare() {
+	default
+	multilib_copy_sources
+
+	# Workaround #713940 / https://github.com/facebook/zstd/issues/2045
+	# where upstream build system does not add -pthread for Makefile-based
+	# build system.
+	use threads && append-flags $(test-flags-CCLD -pthread)
+}
+
+mymake() {
+	emake \
+		CC="$(tc-getCC)" \
+		CXX="$(tc-getCXX)" \
+		AR="$(tc-getAR)" \
+		PREFIX="${EPREFIX}/usr" \
+		LIBDIR="${EPREFIX}/usr/$(get_libdir)" \
+		"${@}"
+}
+
+multilib_src_compile() {
+	local libzstd_targets=( libzstd{,.a}$(usex threads '-mt' '') )
+
+	mymake -C lib ${libzstd_targets[@]} libzstd.pc
+
+	if multilib_is_native_abi ; then
+		mymake HAVE_LZ4="$(usex lz4 1 0)" zstd
+
+		mymake -C contrib/pzstd
+	fi
+}
+
+multilib_src_install() {
+	mymake -C lib DESTDIR="${D}" install
+
+	if multilib_is_native_abi ; then
+		mymake -C programs DESTDIR="${D}" install
+
+		mymake -C contrib/pzstd DESTDIR="${D}" install
+	fi
+}
+
+multilib_src_install_all() {
+	einstalldocs
+
+	if ! use static-libs; then
+		find "${ED}" -name "*.a" -delete || die
+	fi
+}