Add sys-libs/libunwind-1.2.1, update sys-libs/libunwind-1.1-r1

8 files changed, 283 insertions, 3 deletions

diff --git a/sys-libs/libunwind/Manifest b/sys-libs/libunwind/Manifest
index 02f22367..b3a5113f 100644
--- a/sys-libs/libunwind/Manifest
+++ b/sys-libs/libunwind/Manifest
@@ -1,5 +1,12 @@
 AUX libunwind-1.1-fix-CVE-2015-3239.patch 523 SHA256 3d37676dfaf88e267fd2e0422db93b9613f91af40fc5f4189806a64a23b07de9 SHA512 71f28720486c07cbbc31cf2747096e324cc43dd57c4ec9312da12fd4aa9d5af83e4cbe80071b6192cdf14a2e2afd090c136e57476ac981204a933db67d609c01 WHIRLPOOL 5c2b15253ca2ef597ebf6a6ae1b26c5728ce50dd5468c6115546b0af83e19b73c5becf3d1885b275e7619318f279dbb0eab531905b64c3bc87c8fb2cdd1fc31b
 AUX libunwind-1.1-lzma.patch 3004 SHA256 84716d048c507862761f4889871ab6428f9ca5818baeb3bddbc5612d5ff3ef15 SHA512 d15f849d743426fd030de2990d683a5373273ecfc407b081280e7f5fb2e65350496badb7b094911719e5b3f6bdac5ddf2653e556391c58a8559938a11f60250c WHIRLPOOL 3d56eed2a93fa373516d923bf0c491c68c464e62c0302ba0bc995d2491b27b01b109dd750bc47079f66c163c5f1a1a5d13c541709c0090ff78926bcdc98da992
 AUX libunwind-1.1-x32.patch 448 SHA256 6d2c3a0054830dcf89c36ad00efc14f3cfaeb69124eacbf1234658d017bee30a SHA512 fcfb19b71cef5ae0141818f0dd246c9a3fdc8ca4eae1baea3ee4f96edecdeabce6cba412fe7e35c55c4294655dda196ddd8bceeefb146c9b1c12aaaa05300df2 WHIRLPOOL dc104ec70e57bde17f79571a9682cac70609d712d2191e41a17614566efbf09e301b48a5fd387cf0340a563569e821a57cce7cf1484772f01788388fab54774e
+AUX libunwind-1.2-coredump-regs.patch 619 SHA256 81383383135b5f12aab63d62fa54c18bf13fe659e1a5a8a5ae35dba95b72c755 SHA512 48536ef54590221b42a3ca568ec781e526807b3d8aed3e33e19e6efacfa05a428a6101d3a51e79ea5d3e1d783bcba9acb92f7623c121d3e00cd3e1a17d13e282 WHIRLPOOL caa4a9a7b9fa1ee2aede2e2af5010472a459076d093191994496afd0beb7446b18e619041594cce346e03313808413fead02a0f4e65ef91da5a66d38f51e2e0a
+AUX libunwind-1.2-ia64-missing.patch 3863 SHA256 e5163247366ca68c5e2671208f2a848e1e25c23d1e56099ddabe0b65d36c538e SHA512 e8f65d706839770d993f9801371e1e294a0231c4bfe29b497e4a859567b7f5b6561b0a15d59b1626311e549fe57149046f5a76424a2ad69c521610aaa3019c17 WHIRLPOOL 10304bd170ce4e23bf82ca656ab460ff1d7ba0414b103329916afb6eea238155e001b70d83c4a138e950b095b5d259e966c00733c8f750e6e748a5fd577b11f9
+AUX libunwind-1.2-ia64-ptrace-coredump.patch 1445 SHA256 003e6a4724cb2ffb25bd5f18666e0b5866d5f701ca26275a8a1c90617ae79e73 SHA512 0bab310ff16294d7617077ffa1261fe9c1a6aaeb4339c96918869c4dd9a2b1b73fbe2ebb5c895f1a420ff7922da85cbb44ccfcd69df6e2518c1f2ff64b7b2d76 WHIRLPOOL 56878f6eed550b99dac1104d7a227d3954d57ad3e374bdee8049599035cd508945df2ec98c51376e9f0b719dc30b76295087df208609e5d0494e4215f918b106
+AUX libunwind-1.2-ia64-undwarf.patch 581 SHA256 24dc59a2e18c8638430cb492e2c0655a1b4f9a5e14166fc89be403878913ea28 SHA512 a83dd2d2bea706fb0f57b854015c6f1db882d649e931e12bb1a5524c8176e326d7d4a448f986c9475d1bd4c6e22a0e9a1c813c7a5b47fcd61457806c1f32fe85 WHIRLPOOL 2e0b3fb09b96312ad492d62cc7ce00ab5277bca810725e45f71a77a441acc46f6fe7719bc8a9809999a0f2b44323f56ccd4d3d105419e243f24359945f89bda7
+AUX libunwind-1.2-x32.patch 531 SHA256 458fee923fcdfee0bffa0ed2f38b986f331f81fac89fc208109ca9aecb3bb6d8 SHA512 b7b7f61a9d74aad8b38450234b4bf346ab28e1057a5e1dc717e064944ed4b0bb4624ab7ece2ce21b30559bb4df669cb2009c7745afff7bdda0c1358d76596c35 WHIRLPOOL e17861f8f5a479b14e747ff62fd3aa79308cc4e253c9099dc2fde5677cd069aa9b6462ef6cb99ca6caa72faecf173b81bb5810b8943c37e6a4e0b1f071ff9512
 DIST libunwind-1.1.tar.gz 1098603 SHA256 9dfe0fcae2a866de9d3942c66995e4b460230446887dbdab302d41a8aee8d09a SHA512 bfe04f2bfac9f9e47c37f0b23ed2f264d8d3d3d6f1392fe9d794ee13cad216b3740979e922e4276fb65c1ccdc836fce48812cb5459ecdd2a89a621036a35d7c1 WHIRLPOOL 1a0e566edf92c0563cb5525203f2718c3454bc0be25ec8079cde8441de08b6d8951db7cbf2f0a02a4a0f1e6c350e74e551a482d9094996daefa216a79bc9d383
-EBUILD libunwind-1.1-r1.ebuild 2480 SHA256 31f8b31e58bd481951afb667fb93fbabf2b597f382668b681796d7c4079fb411 SHA512 c812e2f40e2277034118726dfa7b5a423ae53a8eb8dd3d112386dd6df50271f4bf56291916c8a34cd6c9c8beb439b7cb913548a2f1a218396d9e7f343ea0a84d WHIRLPOOL a3eb3f8f55d17e66aa78229f9118b5bba3b4d7edd30c2aa1282186238b259210e2e4f0101242d40d2adb64f98b600a0c3a8f0f46d1713d423fcf08a24e05d56f
+DIST libunwind-1.2.1.tar.gz 780774 SHA256 3f3ecb90e28cbe53fba7a4a27ccce7aad188d3210bb1964a923a731a27a75acb SHA512 af7c280d2a963779a4a2711887618bc96383011e4e5d52e4085aa7fb351e55e357468f6ff85e66a216f1c6826538f498335a917a5970575c93be74c96316319b WHIRLPOOL 68cd0bd09b08000b11edb0912ccb7b6b17c8a4ac73fa3c409f17eb9581ac29e7ca015a37cb13a9741725e89caba58d91fa4f5cd18995449593188aedccbddc25
+EBUILD libunwind-1.1-r1.ebuild 2511 SHA256 ec965bdde8be141aacd23bde7a305c2e8cc144b1d45231e6799357dd26d582b9 SHA512 e32026307a03948814cddb30e185bfeeae31cc9bb02584bdcd9cb67ca69ca5ecc77f8b1f0ea75b036aa685afa8e548faa7e0b72d5e15f2036d2be6126296b3d6 WHIRLPOOL bcc9dbd6fdd110cd5e84ef35125daea9b95e848eb466bcc58b955bf8c955899e117cb81fc31b6be3a8c517661e538316697151c558ccbc79a432307bb68f6fc1
+EBUILD libunwind-1.2.1.ebuild 3023 SHA256 fd234c2b34ee3b73edb8e2ccbfd59adb72eefadd0f690ff139332091b07bd4bc SHA512 c599ae9175e00570f45b2bca408ab37149c33be5a44e888df9aa30f5ea18679576fd039542b67eda4a2d9fd7b302dd4b6507b7fa99e1d058c389819a7922b013 WHIRLPOOL 3fb1b33a3e6f3477599b244abab96ae9a3e8087f0d35e13c465c7c2f2e1a489afc1c2ae06256759ad06615524d3f6b5237855b8c628974598b257544e4cd7ce8
diff --git a/sys-libs/libunwind/files/libunwind-1.2-coredump-regs.patch b/sys-libs/libunwind/files/libunwind-1.2-coredump-regs.patch
new file mode 100644
index 00000000..3ddc610d
--- /dev/null
+++ b/sys-libs/libunwind/files/libunwind-1.2-coredump-regs.patch
@@ -0,0 +1,16 @@
+https://bugs.gentoo.org/586092
+
+this might not be correct, but at least it builds, and doesn't crash
+
+--- a/src/coredump/_UCD_access_reg_linux.c
++++ b/src/coredump/_UCD_access_reg_linux.c
+@@ -51,6 +51,9 @@ _UCD_access_reg (unw_addr_space_t as,
+ #elif defined(UNW_TARGET_TILEGX)
+   if (regnum < 0 || regnum > UNW_TILEGX_CFA)
+     goto badreg;
++#elif defined(UNW_TARGET_IA64) || defined(UNW_TARGET_HPPA) || defined(UNW_TARGET_PPC32) || defined(UNW_TARGET_PPC64)
++  if (regnum < 0 || regnum >= ARRAY_SIZE(ui->prstatus->pr_reg))
++    goto badreg;
+ #else
+ #if defined(UNW_TARGET_MIPS)
+   static const uint8_t remap_regs[] =
diff --git a/sys-libs/libunwind/files/libunwind-1.2-ia64-missing.patch b/sys-libs/libunwind/files/libunwind-1.2-ia64-missing.patch
new file mode 100644
index 00000000..e15250b4
--- /dev/null
+++ b/sys-libs/libunwind/files/libunwind-1.2-ia64-missing.patch
@@ -0,0 +1,93 @@
+Original libunwind release is missing a few ia64-specific files in tarball.
+diff --git a/src/ia64/mk_Gcursor_i.c b/src/ia64/mk_Gcursor_i.c
+new file mode 100644
+index 0000000..67b14d5
+--- /dev/null
++++ b/src/ia64/mk_Gcursor_i.c
+@@ -0,0 +1,65 @@
++/* libunwind - a platform-independent unwind library
++   Copyright (C) 2003 Hewlett-Packard Co
++        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
++
++This file is part of libunwind.
++
++Permission is hereby granted, free of charge, to any person obtaining
++a copy of this software and associated documentation files (the
++"Software"), to deal in the Software without restriction, including
++without limitation the rights to use, copy, modify, merge, publish,
++distribute, sublicense, and/or sell copies of the Software, and to
++permit persons to whom the Software is furnished to do so, subject to
++the following conditions:
++
++The above copyright notice and this permission notice shall be
++included in all copies or substantial portions of the Software.
++
++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
++EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
++MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
++NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
++LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
++OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
++WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
++
++/* Utility to generate cursor_i.h.  */
++
++#include "libunwind_i.h"
++
++#ifdef offsetof
++# undef offsetof
++#endif
++
++#define offsetof(type,field)    ((char *) &((type *) 0)->field - (char *) 0)
++
++#define OFFSET(sym, offset) \
++        asm volatile("\n->" #sym " %0" : : "i" (offset))
++
++int
++main (void)
++{
++  OFFSET("IP_OFF",       offsetof (struct cursor, ip));
++  OFFSET("PR_OFF",       offsetof (struct cursor, pr));
++  OFFSET("BSP_OFF",      offsetof (struct cursor, bsp));
++  OFFSET("PSP_OFF",      offsetof (struct cursor, psp));
++  OFFSET("PFS_LOC_OFF",  offsetof (struct cursor, loc[IA64_REG_PFS]));
++  OFFSET("RNAT_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_RNAT]));
++  OFFSET("UNAT_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_UNAT]));
++  OFFSET("LC_LOC_OFF",   offsetof (struct cursor, loc[IA64_REG_LC]));
++  OFFSET("FPSR_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_FPSR]));
++  OFFSET("B1_LOC_OFF",   offsetof (struct cursor, loc[IA64_REG_B1]));
++  OFFSET("B2_LOC_OFF",   offsetof (struct cursor, loc[IA64_REG_B2]));
++  OFFSET("B3_LOC_OFF",   offsetof (struct cursor, loc[IA64_REG_B3]));
++  OFFSET("B4_LOC_OFF",   offsetof (struct cursor, loc[IA64_REG_B4]));
++  OFFSET("B5_LOC_OFF",   offsetof (struct cursor, loc[IA64_REG_B5]));
++  OFFSET("F2_LOC_OFF",   offsetof (struct cursor, loc[IA64_REG_F2]));
++  OFFSET("F3_LOC_OFF",   offsetof (struct cursor, loc[IA64_REG_F3]));
++  OFFSET("F4_LOC_OFF",   offsetof (struct cursor, loc[IA64_REG_F4]));
++  OFFSET("F5_LOC_OFF",   offsetof (struct cursor, loc[IA64_REG_F5]));
++  OFFSET("FR_LOC_OFF",   offsetof (struct cursor, loc[IA64_REG_F16]));
++  OFFSET("LOC_SIZE",
++      (offsetof (struct cursor, loc[1]) - offsetof (struct cursor, loc[0])));
++  OFFSET("SIGCONTEXT_ADDR_OFF", offsetof (struct cursor, sigcontext_addr));
++  return 0;
++}
+diff --git a/src/ia64/mk_Lcursor_i.c b/src/ia64/mk_Lcursor_i.c
+new file mode 100644
+index 0000000..aee2e7e
+--- /dev/null
++++ b/src/ia64/mk_Lcursor_i.c
+@@ -0,0 +1,2 @@
++#define UNW_LOCAL_ONLY
++#include "mk_Gcursor_i.c"
+diff --git a/src/ia64/mk_cursor_i b/src/ia64/mk_cursor_i
+new file mode 100755
+index 0000000..9211f91
+--- /dev/null
++++ b/src/ia64/mk_cursor_i
+@@ -0,0 +1,7 @@
++#!/bin/sh
++test -z "$1" && exit 1
++echo "/* GENERATED */"
++echo "#ifndef cursor_i_h"
++echo "#define cursor_i_h"
++sed -ne 's/^->"\(\S*\)" \(\d*\)/#define \1 \2/p' < $1 || exit $?
++echo "#endif"
diff --git a/sys-libs/libunwind/files/libunwind-1.2-ia64-ptrace-coredump.patch b/sys-libs/libunwind/files/libunwind-1.2-ia64-ptrace-coredump.patch
new file mode 100644
index 00000000..3785d882
--- /dev/null
+++ b/sys-libs/libunwind/files/libunwind-1.2-ia64-ptrace-coredump.patch
@@ -0,0 +1,34 @@
+Fix build failure on ia64.
+    coredump/_UPT_get_dyn_info_list_addr.c
+is almost identical to
+    ptrace/_UPT_get_dyn_info_list_addr.c
+It's clearly an __ia64 implementation copy.
+diff --git a/src/coredump/_UPT_get_dyn_info_list_addr.c b/src/coredump/_UPT_get_dyn_info_list_addr.c
+index 0d11905..176b146 100644
+--- a/src/coredump/_UPT_get_dyn_info_list_addr.c
++++ b/src/coredump/_UPT_get_dyn_info_list_addr.c
+@@ -31,2 +31,3 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+ # include "os-linux.h"
++# include "../ptrace/_UPT_internal.h"
+ 
+@@ -40,3 +41,2 @@ get_list_addr (unw_addr_space_t as, unw_word_t *dil_addr, void *arg,
+   char path[PATH_MAX];
+-  unw_dyn_info_t *di;
+   unw_word_t res;
+@@ -50,5 +50,5 @@ get_list_addr (unw_addr_space_t as, unw_word_t *dil_addr, void *arg,
+ 
+-      invalidate_edi (&ui->edi);
++      invalidate_edi(&ui->edi);
+ 
+-      if (elf_map_image (&ui->ei, path) < 0)
++      if (elf_map_image (&ui->edi.ei, path) < 0)
+         /* ignore unmappable stuff like "/SYSV00001b58 (deleted)" */
+@@ -58,6 +58,5 @@ get_list_addr (unw_addr_space_t as, unw_word_t *dil_addr, void *arg,
+ 
+-      di = tdep_find_unwind_table (&ui->edi, as, path, lo, off);
+-      if (di)
++      if (tdep_find_unwind_table (&ui->edi, as, path, lo, off, 0) > 0)
+         {
+-          res = _Uia64_find_dyn_list (as, di, arg);
++          res = _Uia64_find_dyn_list (as, &ui->edi.di_cache, arg);
+           if (res && count++ == 0)
diff --git a/sys-libs/libunwind/files/libunwind-1.2-ia64-undwarf.patch b/sys-libs/libunwind/files/libunwind-1.2-ia64-undwarf.patch
new file mode 100644
index 00000000..1e3e2489
--- /dev/null
+++ b/sys-libs/libunwind/files/libunwind-1.2-ia64-undwarf.patch
@@ -0,0 +1,17 @@
+diff --git a/src/mi/Gget_proc_name.c b/src/mi/Gget_proc_name.c
+index 5376f82..64d2503 100644
+--- a/src/mi/Gget_proc_name.c
++++ b/src/mi/Gget_proc_name.c
+@@ -106,8 +106,12 @@ unw_get_proc_name (unw_cursor_t *cursor, char *buf, size_t buf_len,
+   ip = tdep_get_ip (c);
++#if !defined(__ia64)
+   if (c->dwarf.use_prev_instr)
+     --ip;
++#endif
+   error = get_proc_name (tdep_get_as (c), ip, buf, buf_len, offp,
+                          tdep_get_as_arg (c));
++#if !defined(__ia64)
+   if (c->dwarf.use_prev_instr && offp != NULL && error == 0)
+     *offp += 1;
++#endif
+   return error;
diff --git a/sys-libs/libunwind/files/libunwind-1.2-x32.patch b/sys-libs/libunwind/files/libunwind-1.2-x32.patch
new file mode 100644
index 00000000..76437015
--- /dev/null
+++ b/sys-libs/libunwind/files/libunwind-1.2-x32.patch
@@ -0,0 +1,13 @@
+--- a/src/x86_64/Gos-linux.c
++++ b/src/x86_64/Gos-linux.c
+@@ -143,8 +143,8 @@ x86_64_sigreturn (unw_cursor_t *cursor)
+ 
+   Debug (8, "resuming at ip=%llx via sigreturn(%p)\n",
+              (unsigned long long) c->dwarf.ip, sc);
+-  __asm__ __volatile__ ("mov %0, %%rsp;"
+-                        "mov %1, %%rax;"
++  __asm__ __volatile__ ("mov %q0, %%rsp;"
++                        "mov %q1, %%rax;"
+                         "syscall"
+                         :: "r"(sc), "i"(SYS_rt_sigreturn)
+                         : "memory");
diff --git a/sys-libs/libunwind/libunwind-1.1-r1.ebuild b/sys-libs/libunwind/libunwind-1.1-r1.ebuild
index 17a26ac1..11a37aff 100644
--- a/sys-libs/libunwind/libunwind-1.1-r1.ebuild
+++ b/sys-libs/libunwind/libunwind-1.1-r1.ebuild
@@ -12,7 +12,7 @@ SRC_URI="mirror://nongnu/libunwind/${P}.tar.gz"
 LICENSE="MIT"
 SLOT="7"
 KEYWORDS="amd64 arm hppa ia64 ~mips ppc ppc64 x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux"
-IUSE="debug debug-frame libatomic lzma static-libs"
+IUSE="abi_x86_x32 debug debug-frame libatomic lzma static-libs"
 
 RESTRICT="test" #461958 -- re-enable tests with >1.1 again for retesting, this is here for #461394
 
@@ -37,7 +37,7 @@ src_prepare() {
 	sed -i -e '/LIBLZMA/s:-lzma:-llzma:' configure{.ac,} || die #444050
 	epatch "${FILESDIR}"/${P}-lzma.patch #444050
 	epatch "${FILESDIR}"/${P}-fix-CVE-2015-3239.patch #585830
-	epatch "${FILESDIR}"/${P}-x32.patch
+	use abi_x86_x32 && epatch "${FILESDIR}"/${P}-x32.patch
 	elibtoolize
 }
 
diff --git a/sys-libs/libunwind/libunwind-1.2.1.ebuild b/sys-libs/libunwind/libunwind-1.2.1.ebuild
new file mode 100644
index 00000000..53791427
--- /dev/null
+++ b/sys-libs/libunwind/libunwind-1.2.1.ebuild
@@ -0,0 +1,100 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+MY_PV=${PV/_/-}
+MY_P=${PN}-${MY_PV}
+inherit eutils libtool multilib-minimal
+
+DESCRIPTION="Portable and efficient API to determine the call-chain of a program"
+HOMEPAGE="https://savannah.nongnu.org/projects/libunwind"
+SRC_URI="mirror://nongnu/libunwind/${MY_P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="7"
+KEYWORDS="amd64 arm ~arm64 ~hppa ia64 ~mips ppc ppc64 x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux"
+IUSE="abi_x86_x32 debug debug-frame doc libatomic lzma static-libs"
+
+RESTRICT="test" # half of tests are broken (toolchain version dependent)
+
+# We just use the header from libatomic.
+RDEPEND="lzma? ( app-arch/xz-utils )"
+DEPEND="${RDEPEND}
+	libatomic? ( dev-libs/libatomic_ops )"
+
+# Bug 586208
+CCACHE_NODIRECT=1
+
+S="${WORKDIR}/${MY_P}"
+
+MULTILIB_WRAPPED_HEADERS=(
+	/usr/include/libunwind.h
+
+	# see libunwind.h for the full list of arch-specific headers
+	/usr/include/libunwind-aarch64.h
+	/usr/include/libunwind-arm.h
+	/usr/include/libunwind-hppa.h
+	/usr/include/libunwind-ia64.h
+	/usr/include/libunwind-mips.h
+	/usr/include/libunwind-ppc32.h
+	/usr/include/libunwind-ppc64.h
+	/usr/include/libunwind-sh.h
+	/usr/include/libunwind-tilegx.h
+	/usr/include/libunwind-x86.h
+	/usr/include/libunwind-x86_64.h
+)
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-1.2-coredump-regs.patch #586092
+	"${FILESDIR}"/${PN}-1.2-ia64-undwarf.patch
+	"${FILESDIR}"/${PN}-1.2-ia64-ptrace-coredump.patch
+	"${FILESDIR}"/${PN}-1.2-ia64-missing.patch
+)
+
+src_prepare() {
+	use abi_x86_x32 && PATCHES+=( "${FILESDIR}"/${PN}-1.2-x32.patch )
+
+	default
+	chmod +x src/ia64/mk_cursor_i || die
+	# Since we have tests disabled via RESTRICT, disable building in the subdir
+	# entirely.  This worksaround some build errors too. #484846
+	sed -i -e '/^SUBDIRS/s:tests::' Makefile.in || die
+
+	elibtoolize
+}
+
+multilib_src_configure() {
+	# --enable-cxx-exceptions: always enable it, headers provide the interface
+	# and on some archs it is disabled by default causing a mismatch between the
+	# API and the ABI, bug #418253
+	# conservative-checks: validate memory addresses before use; as of 1.0.1,
+	# only x86_64 supports this, yet may be useful for debugging, couple it with
+	# debug useflag.
+	ECONF_SOURCE="${S}" \
+	ac_cv_header_atomic_ops_h=$(usex libatomic) \
+	econf \
+		--enable-cxx-exceptions \
+		--enable-coredump \
+		--enable-ptrace \
+		--enable-setjmp \
+		$(use_enable debug-frame) \
+		$(use_enable doc documentation) \
+		$(use_enable lzma minidebuginfo) \
+		$(use_enable static-libs static) \
+		$(use_enable debug conservative_checks) \
+		$(use_enable debug)
+}
+
+multilib_src_test() {
+	# Explicitly allow parallel build of tests.
+	# Sandbox causes some tests to freak out.
+	SANDBOX_ON=0 emake check
+}
+
+multilib_src_install() {
+	default
+	# libunwind-ptrace.a (and libunwind-ptrace.h) is separate API and without
+	# shared library, so we keep it in any case
+	use static-libs || find "${ED}"usr '(' -name 'libunwind-generic.a' -o -name 'libunwind*.la' ')' -delete
+}