From d826147859b1ed79a2dca4861aafe65532ab52ce Mon Sep 17 00:00:00 2001
From: Thomas Schwinge <thomas@codesourcery.com>
Date: Mon, 22 Feb 2016 12:48:19 +0100
Subject: open_issues/gcc: bd5bb665eb00598666a8162c2440410a51eb9e7e
 (2016-02-20)

---
 open_issues/gcc.mdwn   | 403 ++++++++++++++++++++++++++++++++++++++++++++++---
 open_issues/gccgo.mdwn | 109 ++++++++++++-
 open_issues/gnat.mdwn  | 170 +++++++++++++++++++++
 3 files changed, 658 insertions(+), 24 deletions(-)

(limited to 'open_issues')

diff --git a/open_issues/gcc.mdwn b/open_issues/gcc.mdwn
index 8fef7e7f..bf07de56 100644
--- a/open_issues/gcc.mdwn
+++ b/open_issues/gcc.mdwn
@@ -30,12 +30,12 @@ example.  Especially all the compiler magic is all the same.
 git checkout reviewed
 git diff --patience --stat=$COLUMNS,$COLUMNS --patch --src-prefix=./ --dst-prefix=./ --word-diff --color --find-renames --ignore-space-change ..upstream/trunk | awk '/^(\x1b\[[0-9]+m)?diff/ { c = " " $0; } /^(\x1b\[[0-9]+m)?@@/ { print c; } { print; }' | less
 -i
-/^---.*/([^.]*|.*\.texi.*|[^/]*gnu[^/]*|libgo/go/(net/sock_bsd\.go|syscall/exec_bsd\.go|syscall/libcall_posix\.go))$|hurd|linux|nacl|nptl|glibc($|[^x]|x[^x]|x$)|gs:|dg-runtest
+/^---.*/([^.]*|.*\.texi.*|[^/]*gnu[^/]*|libgo/go/(net/sock_bsd\.go|syscall/exec_bsd\.go|syscall/libcall_posix\.go))$|hurd|linux|nacl|nptl|glibc($|[^x]|x[^x]|x$)|gs:|seg_gs|seg_tls
 
 -->
 
 Last reviewed up to the Git mirror's commit
-c16b7ed55398d2ea55d9ab35519f20cc053b9d0a (2015-01-19).
+bd5bb665eb00598666a8162c2440410a51eb9e7e (2016-02-20).
 
 <http://gcc.gnu.org/install/configure.html> has documentation for the
 `configure` switches.
@@ -286,6 +286,20 @@ c16b7ed55398d2ea55d9ab35519f20cc053b9d0a (2015-01-19).
         [[!GCC_PR 57851 desc="[patch] unwinding via signal trampoline for
         kfreebsd*-gnu"]].
 
+          * `unwind-dw2-fde-dip.c`
+
+                #if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
+                    && defined(TARGET_DL_ITERATE_PHDR) \
+                    {+&& defined(__linux__)+}
+                {+# define USE_PT_GNU_EH_FRAME+}
+                {+#endif+}
+                
+                {+#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \+}
+                {+    && defined(TARGET_DL_ITERATE_PHDR) \+}
+                    && (defined(__DragonFly__) || defined(__FreeBSD__))
+                # define ElfW __ElfN
+                # define USE_PT_GNU_EH_FRAME
+
       * `libitm`
 
         TODO:
@@ -294,6 +308,167 @@ c16b7ed55398d2ea55d9ab35519f20cc053b9d0a (2015-01-19).
 
       * `liboffloadmic`
 
+      * `libgomp`
+
+          * `testsuite/libgomp.c/affinity-1.c`
+
+      * Check if linker supports -pie option with copy reloc
+
+            diff --git ./gcc/configure.ac ./gcc/configure.ac
+            {+AC_MSG_CHECKING(linker PIE support with copy reloc)+}
+            {+gcc_cv_ld_pie_copyreloc=no+}
+            {+if test $gcc_cv_ld_pie = yes ; then+}
+            {+  if test $in_tree_ld = yes ; then+}
+            {+    if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then+}
+            {+      gcc_cv_ld_pie_copyreloc=yes+}
+            {+    fi+}
+            {+  elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then+}
+            {+    # Check if linker supports -pie option with copy reloc+}
+            {+    case "$target" in+}
+            {+    i?86-*-linux* | x86_64-*-linux*)+}
+            {+[...]+}
+            
+            diff --git ./gcc/testsuite/gcc.target/i386/pie-copyrelocs-1.c ./gcc/testsuite/gcc.target/i386/pie-copyrelocs-1.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pie-copyrelocs-2.c ./gcc/testsuite/gcc.target/i386/pie-copyrelocs-2.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pie-copyrelocs-3.c ./gcc/testsuite/gcc.target/i386/pie-copyrelocs-3.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pie-copyrelocs-4.c ./gcc/testsuite/gcc.target/i386/pie-copyrelocs-4.c
+            @@ -0,0 +1,14 @@
+            {+/* [...] */+}
+            {+/* { dg-do compile { target *-*-linux* } } */+}
+            {+/* { dg-require-effective-target pie_copyreloc } */+}
+            {+/* { dg-options "-O2 -fpie" } */+}
+
+            -checking linker PIE support with copy reloc... yes
+            +checking linker PIE support with copy reloc... no
+
+      * Testsuite
+
+            diff --git ./gcc/testsuite/gcc.target/i386/pr65248-1.c ./gcc/testsuite/gcc.target/i386/pr65248-1.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr65248-2.c ./gcc/testsuite/gcc.target/i386/pr65248-2.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr65248-3.c ./gcc/testsuite/gcc.target/i386/pr65248-3.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr65248-4.c ./gcc/testsuite/gcc.target/i386/pr65248-4.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr67215-1.c ./gcc/testsuite/gcc.target/i386/pr67215-1.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr67215-2.c ./gcc/testsuite/gcc.target/i386/pr67215-2.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr67215-3.c ./gcc/testsuite/gcc.target/i386/pr67215-3.c
+            @@ -0,0 +1,17 @@
+            {+/* { dg-do compile { target *-*-linux* } } */+}
+            {+/* { dg-options "-O2 -fpic" } */+}
+
+            diff --git ./gcc/testsuite/gcc.target/i386/pr32219-9.c ./gcc/testsuite/gcc.target/i386/pr32219-9.c
+            @@ -0,0 +1,16 @@
+            {+/* { dg-do compile { target *-*-linux* } } */+}
+            {+/* { dg-options "-O2 -fpie" } */+}
+
+            diff --git ./gcc/testsuite/gcc.target/i386/pr63495.c ./gcc/testsuite/gcc.target/i386/pr63495.c
+            @@ -0,0 +1,6 @@
+            {+/* PR c/63495 */+}
+            {+/* { dg-do compile { target { i?86-*-linux* x86_64-*-linux* } } } */+}
+
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-1.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-2.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-3.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-4.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-6.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-7.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-8.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-9.c
+            @@ -0,0 +1,13 @@
+            {+/* { dg-do compile { target *-*-linux* } } */+}
+
+            gcc/testsuite/c-c++-common/pr37743.c
+            gcc/testsuite/gcc.dg/iec-559-macros-9.c
+            gcc/testsuite/gcc.dg/pg-override.c
+            gcc/testsuite/gcc.dg/pg.c
+            gcc/testsuite/gcc.target/i386/fentry-override.c
+            gcc/testsuite/gcc.target/i386/fentry.c
+            gcc/testsuite/gcc.target/i386/struct-size.c
+            Linux?
+
+            libstdc++-v3/testsuite/21_strings/c_strings/char/69626.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/cons/1.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/cons/2.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/cons/3.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/cons/4.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/cons/5.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/cons/6.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/locking/1.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/locking/2.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/locking/3.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/locking/4.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/modifiers/1.cc
+            libstdc++-v3/testsuite/30_threads/shared_lock/modifiers/2.cc
+            libstdc++-v3/testsuite/30_threads/shared_timed_mutex/cons/1.cc
+            libstdc++-v3/testsuite/30_threads/shared_timed_mutex/try_lock/1.cc
+            libstdc++-v3/testsuite/30_threads/shared_timed_mutex/try_lock/2.cc
+            libstdc++-v3/testsuite/30_threads/shared_timed_mutex/try_lock/3.cc
+            libstdc++-v3/testsuite/30_threads/shared_mutex/cons/1.cc
+            libstdc++-v3/testsuite/30_threads/shared_mutex/try_lock/1.cc
+            libstdc++-v3/testsuite/30_threads/shared_mutex/try_lock/2.cc
+            Linux?
+
+            diff --git ./gcc/testsuite/gcc.dg/tm/memopt-15.c ./gcc/testsuite/gcc.dg/tm/memopt-15.c
+            @@ -1,4 +1,4 @@
+            /* { dg-do compile { target { {+i?86-*-linux*+} x86_64-*-linux* } } } */
+            /* { dg-options "-fgnu-tm -O" } */
+
+            diff --git ./gcc/testsuite/gcc.target/i386/pr61296-1.c ./gcc/testsuite/gcc.target/i386/pr61296-1.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr61296-2.c ./gcc/testsuite/gcc.target/i386/pr61296-2.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr61296-3.c ./gcc/testsuite/gcc.target/i386/pr61296-3.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr61296-4.c ./gcc/testsuite/gcc.target/i386/pr61296-4.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr61296-5.c ./gcc/testsuite/gcc.target/i386/pr61296-5.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr61296-6.c ./gcc/testsuite/gcc.target/i386/pr61296-6.c
+            diff --git ./gcc/testsuite/gcc.target/i386/pr61296-7.c ./gcc/testsuite/gcc.target/i386/pr61296-7.c
+            @@ -0,0 +1,27 @@
+            {+/* PR target/61296 */+}
+            {+/* { dg-do compile { target { *-*-linux* } } } */+}
+
+            gcc/testsuite/gcc.target/i386/mcount_pic.c
+            gcc/testsuite/gcc.target/i386/nop-mcount.c
+            gcc/testsuite/gcc.target/i386/record-mcount.c
+            Linux?
+
+            --- /dev/null
+            +++ ./gcc/testsuite/gcc.dg/fdata-sections-2.c
+             diff --git ./gcc/testsuite/gcc.dg/fdata-sections-2.c ./gcc/testsuite/gcc.dg/fdata-sections-2.c
+            @@ -0,0 +1,18 @@
+            {+/* { dg-do compile { target *-*-linux* } } */+}
+
+            --- /dev/null
+            +++ ./gcc/testsuite/gcc.target/i386/noplt-1.c
+            +++ ./gcc/testsuite/gcc.target/i386/noplt-2.c
+            +++ ./gcc/testsuite/gcc.target/i386/noplt-3.c
+            +++ ./gcc/testsuite/gcc.target/i386/noplt-4.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr66275.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr68018.c
+            {+/* { dg-do compile { target { *-*-linux* && { ! ia32 } } } } */+}
+
+            --- /dev/null
+            +++ ./gcc/testsuite/gcc.target/i386/pr68937-1.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr68937-2.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr68937-3.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr68937-4.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr68937-5.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr68937-6.c
+            {+/* { dg-do compile { target { *-*-linux* && ia32 } } } */+}
+            {+/* { dg-options "-O2 -fpic -fno-plt -mregparm=3" } */+}
+
+            --- /dev/null
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-10.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-11.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-12.c
+            +++ ./gcc/testsuite/gcc.target/i386/pr66232-13.c
+            {+/* { dg-do compile { target { *-*-linux* && { ! ia32 } } } } */+}
+            {+/* { dg-require-effective-target maybe_x32 } */+}
+            {+/* { dg-options "-O2 -mx32 -fpic -fno-plt -maddress-mode=long" } */+}
+
+            diff --git ./gcc/testsuite/gcc.target/i386/iamcu/abi-iamcu.exp ./gcc/testsuite/gcc.target/i386/iamcu/abi-iamcu.exp
+            @@ -0,0 +1,42 @@
+            {+[...]+}
+            {+if { (![istarget x86_64-*-linux*] && ![istarget i?86-*-linux*])+}
+            {+     || ![is-effective-target ia32] } then {+}
+            {+  return+}
+            {+}+}
+
   * `hurd/usr`
 
     `NATIVE_SYSTEM_HEADER_DIR`, `638454a19c1c08f01c10517bc72a114250fc4f33`,
@@ -390,6 +565,61 @@ c16b7ed55398d2ea55d9ab35519f20cc053b9d0a (2015-01-19).
       * Might `-fsplit-stack` be useful for us with respect to our
         [[multithreaded|multithreading]] libraries?
 
+      * -fsplit-stack issue in context of [[gccgo]]
+
+            mmap errno 1073741846
+            fatal error: mmap
+
+            Temporary breakpoint 3 at 0x80490fd
+            Starting program: /media/erich/home/thomas/tmp/gcc/t/hurd/go.build/gcc/testsuite/go/array-2.x
+            [New Thread 732.20]
+            
+            Breakpoint 2, backtrace_alloc (state=<optimized out>, state@entry=0x21ffa08, size=size@entry=40, error_callback=<optimized out>, error_callback@entry=0x12c4970 <error_callback>, data=<optimized out>, data@entry=0x0)
+                at ../../../go/libbacktrace/mmap.c:140
+            140           page = mmap (NULL, asksize, PROT_READ | PROT_WRITE,
+            (gdb) info threads
+              Id   Target Id         Frame
+              5    Thread 732.20     0x01dedafc in mach_msg_trap () at /usr/src/eglibc-2.17/build-tree/hurd-i386-libc/mach/mach_msg_trap.S:2
+            * 4    Thread 732.19     backtrace_alloc (state=<optimized out>, state@entry=0x21ffa08, size=size@entry=40, error_callback=<optimized out>, error_callback@entry=0x12c4970 <error_callback>, data=<optimized out>, data@entry=0x0)
+                at ../../../go/libbacktrace/mmap.c:140
+            (gdb) set *(int *)0x21ff930 = 123
+            (gdb) call __vm_allocate(1,0x21ff930,4096,1)
+            $20 = 0
+            (gdb) print/x *(int *)0x21ff930
+            $21 = 0x0
+            (gdb) call __vm_allocate(1,0x21ff930,4096,1)
+            $22 = 0
+            (gdb) print/x *(int *)0x21ff930
+            $23 = 0x7d000
+            (gdb) call __vm_allocate(1,0x21ff930,4096,1)
+            $24 = 0
+            (gdb) print/x *(int *)0x21ff930
+            $25 = 0x7e000
+
+            $ cat < v.c
+            #include <mach.h>
+            #include <stdio.h>
+            
+            int main(void)
+            {
+              int err;
+              vm_address_t addr = 0;
+            
+              int i;
+              for (i = 0; i < 3; ++i)
+                {
+                  err = vm_allocate(mach_task_self(), &addr, 4096, 1);
+                  printf("%u %p\n", err, (void *) addr);
+                }
+            
+              return 0;
+            }
+            $ gcc -Wall v.c -fsplit-stack 
+            $ ./a.out 
+            0 (nil)
+            0 0x102c000
+            0 0x102e000
+
   * `gcc/ada` (not all reviewed)
 
       * [[Ada (GNAT)|gnat]] support is work in progress.
@@ -399,6 +629,7 @@ c16b7ed55398d2ea55d9ab35519f20cc053b9d0a (2015-01-19).
       * The [[Google Go's libgo|gccgo]] (introduced in
         e440a3286bc89368b8d3a8fd6accd47191790bf2 (2010-12-03)) needs
         OS configuration / support.
+        See [[gccgo]].
 
   * `--enable-frame-pointer`
 
@@ -620,6 +851,25 @@ c16b7ed55398d2ea55d9ab35519f20cc053b9d0a (2015-01-19).
     "20110609002620.GA16719@const.famille.thibault.fr"]].  commit
     026e608ecebcb2a6193971006a85276307d79b00.
 
+  * Does this make sense for us?
+
+        diff --git ./libstdc++-v3/include/std/thread ./libstdc++-v3/include/std/thread
+        @@ -269,7 +279,18 @@ _GLIBCXX_END_NAMESPACE_VERSION
+            /// get_id
+            inline thread::id
+            get_id() noexcept
+            {
+        {+#ifdef __GLIBC__+}
+        {+      // For the GNU C library pthread_self() is usable without linking to+}
+        {+      // libpthread.so but returns 0, so we cannot use it in single-threaded+}
+        {+      // programs, because this_thread::get_id() != thread::id{} must be true.+}
+        {+      // We know that pthread_t is an integral type in the GNU C library.+}
+        {+      if (!__gthread_active_p())+}
+        {+      return thread::id(1);+}
+        {+#endif+}
+              return thread::id(__gthread_self());
+            }
+
   * [[`libsanitizer`|_san]] (not reviewed)
 
     A lot of Linux-specific things.
@@ -636,8 +886,6 @@ c16b7ed55398d2ea55d9ab35519f20cc053b9d0a (2015-01-19).
 
       * `libvtv/vtv_rts.cc`: `/proc/self/exe` usage, `PATH_MAX`.
 
-  * ./libgomp/testsuite/libgomp.c/affinity-1.c Linux usage
-
   * `libcilkrts`
 
     Disabled for Hurd.
@@ -765,13 +1013,55 @@ c16b7ed55398d2ea55d9ab35519f20cc053b9d0a (2015-01-19).
   * Debian GCC 48594516135e34a726cafe3863a4dc661bbd61a4 `boehm-gc: use
     anonymous mmap instead of brk also on hurd-*.`.  [[!debbug 753791]].
 
+  * [low] `libmpx`
+
+    Only enabled for GNU/Linux, but actually seems to be portable.
+
+        gcc/config/i386/linux-common.h:MPX_SPEC
+
+  * `PIE_SPEC`
+
+        diff --git ./gcc/config/gnu-user.h ./gcc/config/gnu-user.h
+        @@ -42,8 +42,11 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+        
+        #if defined HAVE_LD_PIE
+        #define GNU_USER_TARGET_STARTFILE_SPEC \
+          "%{!shared: [-%{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}-]{+%{pg|p|profile:gcrt1.o%s;: \+}
+        {+    %{" PIE_SPEC ":Scrt1.o%s} %{" NO_PIE_SPEC ":crt1.o%s}}}+} \
+           crti.o%s [-%{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}-]{+%{static:crtbeginT.o%s;: %{shared:crtbeginS.o%s} \+}
+        {+            %{" PIE_SPEC ":crtbeginS.o%s} \+}
+        {+            %{" NO_PIE_SPEC ":crtbegin.o%s}}+} \
+
+  * `%gs:`
+
+        diff --git ./gcc/config/i386/i386.c ./gcc/config/i386/i386.c
+        @@ -22879,10 +22887,50 @@ ix86_split_long_move (rtx operands[])
+                  if (GET_MODE (base) != Pmode)
+                    base = gen_rtx_REG (Pmode, REGNO (base));
+        
+                  {+addr = XEXP (part[1][0], 0);+}
+        {+        if (TARGET_TLS_DIRECT_SEG_REFS)+}
+        {+          {+}
+        {+            struct ix86_address parts;+}
+        {+            int ok = ix86_decompose_address (addr, &parts);+}
+        {+            gcc_assert (ok);+}
+        {+            if (parts.seg == DEFAULT_TLS_SEG_REG)+}
+        {+              {+}
+        {+                /* It is not valid to use %gs: or %fs: in+}
+        {+                   lea though, so we need to remove it from the+}
+        {+                   address used for lea and add it to each individual+}
+        {+                   memory loads instead.  */+}
+        [...]
+
+  * x86 Named Address Spaces, `i386: Add address spaces for fs/gs segments and
+    tls`, commit 716c563bcef8bb91dee230dbc75abff70ed2f6ae.
+
 
 # Build
 
 Here's a log of a GCC build run; this is from Git commit
-c16b7ed55398d2ea55d9ab35519f20cc053b9d0a (2015-01-19), with
-b68b3d9d07b2e31cc592ef231a6b963192ae81b6 cherry-picked on laplace.SCHWINGE, run
-on kepler.SCHWINGE and laplace.SCHWINGE.
+bd5bb665eb00598666a8162c2440410a51eb9e7e (2016-02-20), run on kepler.SCHWINGE
+and laplace.SCHWINGE.
 
     $ export LC_ALL=C
     $ (cd ../master/ && contrib/gcc_update --touch)
@@ -787,8 +1077,8 @@ harmonized.
 `/include` for GNU Hurd.  Explicit `--enable-multiarch` because *auto check [is
 disabled if] configured with --native-system-header-dir*.
 
-This takes up around 4.3 GiB, and runs for [[4 h 37 min|performance#measure]]
-on kepler.SCHWINGE and [[3 h 42 min|performance#measure]] on laplace.SCHWINGE.
+This takes up around 4.8 GiB, and runs for [[5 h 0 min|performance#measure]]
+on kepler.SCHWINGE and [[5 h 18 min|performance#measure]] on laplace.SCHWINGE.
 
 <!--
 
@@ -937,14 +1227,24 @@ on kepler.SCHWINGE and [[3 h 42 min|performance#measure]] on laplace.SCHWINGE.
   * `libatomic` on GNU/Linux compiles several more files than on GNU/Hurd.  Is
     that correct?  Probably futex support.
 
+  * `linker -z bndplt option`
+
+        -checking linker -z bndplt option... yes
+        +checking linker -z bndplt option... no
+
+  * `utimensat`
+
+        -checking for utimensat... yes
+        +checking for utimensat... no
+
 
 # Install
 
     $ make install 2>&1 | tee log_install
     [...]
 
-This takes up around 1.4 GiB, and runs for [[2 min|performance#measure]] on
-kepler.SCHWINGE and [[5 min|performance#measure]] on laplace.SCHWINGE.
+This takes up around 1.4 GiB, and runs for [[1 min|performance#measure]] on
+kepler.SCHWINGE and [[6 min|performance#measure]] on laplace.SCHWINGE.
 
 
 ## Analysis
@@ -969,8 +1269,8 @@ kepler.SCHWINGE and [[5 min|performance#measure]] on laplace.SCHWINGE.
     $ make -k check 2>&1 | tee log_test
     [...]
 
-This runs for [[7 h 3 min|performance#measure]] on kepler.SCHWINGE and [[10 h
-19 min|performance#measure]] on laplace.SCHWINGE.
+This runs for [[7 h 55 min|performance#measure]] on kepler.SCHWINGE and [[14 h
+02 min|performance#measure]] on laplace.SCHWINGE.
 
 
 ## Analysis
@@ -1057,17 +1357,23 @@ This runs for [[7 h 3 min|performance#measure]] on kepler.SCHWINGE and [[10 h
         FAIL: g++.dg/ext/cleanup-9.C -std=gnu++98 execution test
         FAIL: g++.dg/ext/cleanup-9.C -std=gnu++11 execution test
 
+        gcc/testsuite/g++.dg/ext/cleanup-10.C:  s.sa_flags = SA_RESETHAND | SA_ONSTACK;
+        gcc/testsuite/g++.dg/ext/cleanup-11.C:  s.sa_flags = SA_RESETHAND | SA_ONSTACK | SA_SIGINFO;
+        gcc/testsuite/gcc.dg/cleanup-10.c:  s.sa_flags = SA_RESETHAND | SA_ONSTACK;
+        gcc/testsuite/gcc.dg/cleanup-11.c:  s.sa_flags = SA_RESETHAND | SA_ONSTACK | SA_SIGINFO;
+
     TODO.
 
-        spawn [open ...]
-        gdb: took too long to attach
-        testcase [...]/gcc/testsuite/gcc.dg/guality/guality.exp completed in 16 seconds
+  * `gfortran`
 
-        spawn [open ...]
-        gdb: took too long to attach
-        testcase [...]/gcc/testsuite/g++.dg/guality/guality.exp completed in 20 seconds
+        +FAIL: gfortran.dg/read_dir.f90   -O0  execution test
+        +FAIL: gfortran.dg/read_dir.f90   -O1  execution test
+        +FAIL: gfortran.dg/read_dir.f90   -O2  execution test
+        +FAIL: gfortran.dg/read_dir.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
+        +FAIL: gfortran.dg/read_dir.f90   -O3 -g  execution test
+        +FAIL: gfortran.dg/read_dir.f90   -Os  execution test
 
-    TODO.  The gfortran ones worked fine.
+    TODO.
 
   * `[ARCH]/libgomp`
 
@@ -1155,6 +1461,63 @@ This runs for [[7 h 3 min|performance#measure]] on kepler.SCHWINGE and [[10 h
     `_ZNSt12__basic_fileIcEC2EP15pthread_mutex_t`
     (`std::__basic_file<char>::__basic_file(pthread_mutex_t*)`) is expected.
 
+        ./libstdc++-v3/config/abi/pre/gnu.ver:    # std::__basic_file
+        ./libstdc++-v3/config/abi/pre/gnu.ver:    _ZNSt12__basic_fileIcEC*;
+        
+        ./libstdc++-v3/config/io/basic_file_stdio.cc:
+        
+        ./libstdc++-v3/config/io/basic_file_stdio.h:
+              __basic_file(__c_lock* __lock = 0) throw ();
+        
+        ./libstdc++-v3/config/io/c_io_stdio.h:
+          typedef __gthread_mutex_t __c_lock;
+        
+        ./libgcc/gthr-posix.h:
+        typedef pthread_mutex_t __gthread_mutex_t;
+        
+        glibc commit 1bcfb5a5eb1c25b64a329c1edf6bcfb440cdbc93 then commit d804f5df602e6a348edcf7d2a2fe73b185bfbd34
+        
+        coulomb:tmp/glibc/tschwinge/Roger_Whittaker.build $ cat < c++-types-check.out
+        --- sysdeps/mach/hurd/i386/c++-types.data       2013-06-06 13:43:19.000000000 +0200
+        +++ -   2013-06-06 13:56:58.263987000 +0200
+        @@ -8 +8 @@
+        -dev_t:y
+        +dev_t:j
+        @@ -14 +14 @@
+        -fsid_t:8__fsid_t
+        +fsid_t:y
+        @@ -31,11 +31,11 @@
+        -pthread_attr_t:14pthread_attr_t
+        -pthread_barrier_t:17pthread_barrier_t
+        -pthread_barrierattr_t:21pthread_barrierattr_t
+        -pthread_cond_t:14pthread_cond_t
+        -pthread_condattr_t:18pthread_condattr_t
+        -pthread_key_t:j
+        -pthread_mutex_t:15pthread_mutex_t
+        -pthread_mutexattr_t:19pthread_mutexattr_t
+        -pthread_once_t:i
+        -pthread_rwlock_t:16pthread_rwlock_t
+        -pthread_rwlockattr_t:20pthread_rwlockattr_t
+        +pthread_attr_t:14__pthread_attr
+        +pthread_barrier_t:17__pthread_barrier
+        +pthread_barrierattr_t:21__pthread_barrierattr
+        +pthread_cond_t:14__pthread_cond
+        +pthread_condattr_t:18__pthread_condattr
+        +pthread_key_t:i
+        +pthread_mutex_t:15__pthread_mutex
+        +pthread_mutexattr_t:19__pthread_mutexattr
+        +pthread_once_t:14__pthread_once
+        +pthread_rwlock_t:16__pthread_rwlock
+        +pthread_rwlockattr_t:20__pthread_rwlockattr
+        @@ -43 +43 @@
+        -pthread_t:m
+        +pthread_t:i
+        @@ -48 +48 @@
+        -sigset_t:10__sigset_t
+        +sigset_t:m
+
+    [[!wikipedia "Name mangling"]].
+
         FAIL: 22_locale/time_get/get_date/wchar_t/4.cc execution test
         FAIL: 27_io/basic_filebuf/close/char/4879.cc execution test
         FAIL: 27_io/basic_filebuf/close/char/9964.cc execution test
diff --git a/open_issues/gccgo.mdwn b/open_issues/gccgo.mdwn
index 0b90ac75..f4c0c96b 100644
--- a/open_issues/gccgo.mdwn
+++ b/open_issues/gccgo.mdwn
@@ -1,4 +1,5 @@
-[[!meta copyright="Copyright © 2011, 2013 Free Software Foundation, Inc."]]
+[[!meta copyright="Copyright © 2011, 2013, 2016 Free Software Foundation,
+Inc."]]
 
 [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
 id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -92,13 +93,14 @@ Also, in `libgo/runtime/proc.c`:`runtime_newm`, `pthread_attr_setstacksize` is
 used, which we also can't support yet, for the same reason.
 
 
-========================
+## 2013-07-15, Fotis
 
 **gccgo manages to get compiled and pass a fair amount of its tests, however its library is failing all but one of its tests.**
 
 Following are the results of the passing suite between the libgo tests run on linux (x86) and the Hurd:
 
-# the Hurd:
+
+### the Hurd:
 
     Test Run By root on Fri Jul 12 17:56:44 UTC 2013
     Native configuration is i686-unknown-gnu0.3
@@ -116,7 +118,8 @@ Following are the results of the passing suite between the libgo tests run on li
     # of unexpected failures	130
     /root/gcc_new/gccbuild/./gcc/gccgo version 4.9.0 20130606 (experimental) (GCC)
 
-# Linux results:
+
+### Linux results:
 
     Test Run By fotis on Τρι 02 Ιούλ 2013 09:20:20 μμ EEST
     Native configuration is i686-pc-linux-gnu
@@ -134,6 +137,104 @@ Following are the results of the passing suite between the libgo tests run on li
     /home/fotis/Software/gcc_build/./gcc/gccgo version 4.9.0 20130702 (experimental) (GCC)
 
 
+## SIGCHLD busy-loops
+
+[[I|tschwinge]] have no recollection anymore what this is about...
+
+    (gdb) thread apply all bt
+    
+    Thread 3 (Thread 19802.3):
+    #0  0x01daab5c in swtch_pri () at /usr/src/eglibc-2.17/build-tree/hurd-i386-libc/mach/swtch_pri.S:2
+    #1  0x01dac544 in __spin_lock_solid (lock=0x1fb700c) at spin-solid.c:26
+    #2  0x01dc1e07 in __spin_lock (__lock=<optimized out>) at ../mach/lock-intern.h:54
+    #3  _hurd_sigstate_lock (ss=ss@entry=0x2b008) at hurdsig.c:172
+    #4  0x01deaefb in __sigprocmask (how=how@entry=2, set=set@entry=0x209ffc9c, oset=oset@entry=0x0) at ../sysdeps/mach/hurd/sigprocmask.c:43
+    #5  0x01deeaff in abort () at abort.c:67
+    #6  0x01dec7c3 in __sigreturn (scp=0x209ffd00) at ../sysdeps/mach/hurd/i386/sigreturn.c:74
+    #7  0x01dc6ac6 in trampoline () from /lib/i386-gnu/libc.so.0.3
+    #8  0x209ffd00 in ?? ()
+    Backtrace stopped: previous frame inner to this frame (corrupt stack?)
+    
+    Thread 2 (Thread 19802.2):
+    #0  0x01daaafc in mach_msg_trap () at /usr/src/eglibc-2.17/build-tree/hurd-i386-libc/mach/mach_msg_trap.S:2
+    #1  0x01dab3be in __mach_msg (msg=msg@entry=0x23fdef0, option=option@entry=3, send_size=32, rcv_size=rcv_size@entry=4096, rcv_name=rcv_name@entry=100, timeout=timeout@entry=0, notify=notify@entry=0) at msg.c:110
+    #2  0x01dabaeb in __mach_msg_server_timeout (demux=demux@entry=0x1dbc9f0 <msgport_server>, max_size=max_size@entry=4096, rcv_name=rcv_name@entry=100, option=option@entry=0, timeout=timeout@entry=0) at msgserver.c:150
+    #3  0x01dabbbb in __mach_msg_server (demux=demux@entry=0x1dbc9f0 <msgport_server>, max_size=4096, rcv_name=100) at msgserver.c:195
+    #4  0x01dbcaed in _hurd_msgport_receive () at msgportdemux.c:67
+    #5  0x01f54ab4 in entry_point (start_routine=0x1dbca80 <_hurd_msgport_receive>, arg=0x0) at ./pthread/pt-create.c:57
+    #6  0x00000000 in ?? ()
+    
+    Thread 1 (Thread 19802.1):
+    #0  0x01daab5c in swtch_pri () at /usr/src/eglibc-2.17/build-tree/hurd-i386-libc/mach/swtch_pri.S:2
+    #1  0x01dac544 in __spin_lock_solid (lock=0x1fb700c) at spin-solid.c:26
+    #2  0x01dc1e07 in __spin_lock (__lock=<optimized out>) at ../mach/lock-intern.h:54
+    #3  _hurd_sigstate_lock (ss=ss@entry=0x1fb7808) at hurdsig.c:172
+    #4  0x01deaefb in __sigprocmask (how=1, set=0x0, oset=0x2004dc78) at ../sysdeps/mach/hurd/sigprocmask.c:43
+    #5  0x01dfe027 in getcontext () at ../sysdeps/mach/hurd/i386/getcontext.S:66
+    #6  0x012d4208 in runtime_mcall (pfn=0x12d4eb0 <schedule>) at ../../../go/libgo/runtime/proc.c:420
+    #7  0x012d48aa in runtime_gosched () at ../../../go/libgo/runtime/proc.c:1371
+    #8  0x012d4acf in syscall.Exitsyscall () at ../../../go/libgo/runtime/proc.c:1494
+    #9  0x012d1cc1 in runtime_MHeap_Scavenger (dummy=0x0) at ../../../go/libgo/runtime/mheap.c:453
+    #10 0x012d4946 in kickoff () at ../../../go/libgo/runtime/proc.c:370
+    #11 0x01dfe0ed in makecontext () at ../sysdeps/mach/hurd/i386/makecontext.S:95
+    #12 0x00000000 in ?? ()
+    
+    (Perhaps in the mean time had received a SIGALARM or whatever DejaGnu sends
+    after timeout, if at all?)
+    
+    
+    -# of expected passes           1714
+    -# of unexpected failures       575
+    +# of expected passes           5067
+    +# of unexpected failures       12
+     # of expected failures         1
+    -# of untested testcases                13
+    +# of untested testcases                7
+
+
+## TODO
+
+    +go_net_cgo_file = go/net/cgo_linux.go
+    +go_net_sock_file = go/net/sock_gnu.go
+      copied from libgo/go/net/sock_bsd.go
+    +go_net_sockopt_file = go/net/sockopt_bsd.go
+    +go_net_sockoptip_file = go/net/sockoptip_bsd.go go/net/sockoptip_posix.go
+    
+    +go_os_sys_file = go/os/sys_uname.go
+    
+    +go_os_stat_file = go/os/stat_atim.go
+    
+    +archive_tar_atim_file = go/archive/tar/stat_atim.go
+    
+    +syscall_exec_file = go/syscall/exec_unix.go
+    +syscall_exec_os_file = go/syscall/exec_gnu.go
+      copied from libgo/go/syscall/exec_bsd.go
+    
+    +syscall_libcall_file = go/syscall/libcall_gnu.go
+      copied from libgo/go/syscall/libcall_posix.go
+    
+    updated
+    
+    ? go_net_poll_file
+    ? go_net_fd_os_file
+    
+     libgo/runtime/proc.c            |   10 +-
+     libgo/runtime/thread.c          |    7 +
+      (some?) code moved elsewhere (runtime_m()->gsignal = runtime_malg(...))
+    
+    New libgo/go/reflect/makefunc_386.S and libgo/go/reflect/makefunc_amd64.S
+    contain Linux thingy.  Review x86 one anyway.  Also:
+    libgo/go/reflect/makefuncgo_386.go.
+    
+    --- ./libgo/go/syscall/libcall_posix.go
+    +++ ./libgo/go/syscall/libcall_posix.go
+    -const nfdbits = int(unsafe.Sizeof(fds_bits_type) * 8)
+    +const nfdbits = int(unsafe.Sizeof(fds_bits_type(0)) * 8)
+
+Have then not anymore reviewed *Go* changes in GCC -- have to restart this from
+scratch.
+
+
 ---
 
 
diff --git a/open_issues/gnat.mdwn b/open_issues/gnat.mdwn
index 48a1e25e..8b98e598 100644
--- a/open_issues/gnat.mdwn
+++ b/open_issues/gnat.mdwn
@@ -90,6 +90,17 @@ svn://svn.debian.org/gcccvs/branches/sid@5638
       Debian already. Hopefully this is the last patch needed for the port of
       GNAT to Hurd.
 
+### 2015-11-27
+
+Is this related to:
+
+`gcc/ada/tracebak.c`:
+
+    #if (defined (__x86_64__) || defined (__linux__)) && !defined (__USING_SJLJ_EXCEPTIONS__)
+    #define USE_GCC_UNWINDER
+    #else
+    #define USE_GENERIC_UNWINDER
+
 
 ## Svante's patch
 
@@ -154,9 +165,168 @@ f6568ea476aa52a6e23c6db43b3e240cde55783a (2013-04-26).
     gcc/ada/s-taprop-linux.adb:            Stack.ss_sp    := Self_ID.Common.Task_Alternate_Stack;
     gcc/ada/s-taprop-posix.adb:            Stack.ss_sp    := Self_ID.Common.Task_Alternate_Stack;
 
+    gcc/ada/init.c:  act.sa_flags |= SA_ONSTACK;
+    gcc/ada/init.c:      act.sa_flags |= SA_ONSTACK;
+    gcc/ada/init.c:  act.sa_flags = SA_SIGINFO | SA_ONSTACK;
+    gcc/ada/init.c:  act.sa_flags |= SA_ONSTACK;
+    gcc/ada/s-intman-posix.adb:                  act.sa_flags := act.sa_flags + SA_ONSTACK;
+    gcc/ada/s-linux-alpha.ads:   SA_ONSTACK  : constant := 16#01#;
+    gcc/ada/s-linux-hppa.ads:   SA_ONSTACK : constant := 16#01#;
+    gcc/ada/s-linux-mipsel.ads:   SA_ONSTACK  : constant := 16#08000000#;
+    gcc/ada/s-linux-sparc.ads:   SA_ONSTACK  : constant := 16#001#;
+    gcc/ada/s-linux.ads:   SA_ONSTACK  : constant := 16#08000000#;
+    gcc/ada/s-osinte-aix.ads:   SA_ONSTACK : constant := 16#0001#;
+    gcc/ada/s-osinte-android.ads:   SA_ONSTACK : constant := System.Linux.SA_ONSTACK;
+    gcc/ada/s-osinte-darwin.ads:   SA_ONSTACK : constant := 16#0001#;
+    gcc/ada/s-osinte-freebsd.ads:   SA_ONSTACK : constant := 16#0001#;
+    gcc/ada/s-osinte-hpux-dce.ads:   SA_ONSTACK  : constant  := 16#01#;
+    gcc/ada/s-osinte-hpux.ads:   SA_ONSTACK : constant := 16#01#;
+    gcc/ada/s-osinte-kfreebsd-gnu.ads:   SA_ONSTACK : constant := 16#0001#;
+    gcc/ada/s-osinte-linux.ads:   SA_ONSTACK : constant := System.Linux.SA_ONSTACK;
+    gcc/ada/s-osinte-lynxos.ads:   SA_ONSTACK : constant := 16#00#;
+    gcc/ada/s-osinte-lynxos.ads:   --  SA_ONSTACK is not defined on LynxOS, but it is referred to in the POSIX
+    gcc/ada/s-osinte-rtems.ads:   SA_ONSTACK : constant := 16#00#;
+    gcc/ada/s-osinte-rtems.ads:   --  SA_ONSTACK is not defined on RTEMS, but it is referred to in the POSIX
+    gcc/ada/s-osinte-solaris-posix.ads:   SA_ONSTACK : constant := 16#0001#;
+    gcc/ada/s-osinte-vxworks.ads:   SA_ONSTACK : constant := 16#0004#;
 
 ## TODO
 
+    diff --git ./gcc/ada/init.c ./gcc/ada/init.c
+    @@ -2002,6 +2021,15 @@ __gnat_install_handler (void)
+      trap_0_entry->inst_fourth = 0xa1480000;
+    #endif
+    
+    {+#if (defined (i386) || defined (__i386__)) && !defined (VTHREADS)+}
+    {+  /*  By experiment, found that sysModel () returns the following string+}
+    {+      prefix for vxsim when running on Linux and Windows.  */+}
+    {+  model = sysModel ();+}
+    {+  if ((strncmp (model, "Linux", 5) == 0)+}
+    {+      || (strncmp (model, "Windows", 7) == 0))+}
+    {+    is_vxsim = 1;+}
+    {+#endif+}
+    
+      __gnat_handler_installed = 1;
+    }
+    
+    diff --git ./gcc/ada/sigtramp.h ./gcc/ada/sigtramp.h
+    @@ -62,8 +62,14 @@ typedef struct ucontext
+         system headers so call it something unique.  */
+      typedef void __sigtramphandler_t (int signo, void *siginfo, void *sigcontext);
+    
+    {+#if CPU == SIMNT || CPU == SIMPENTIUM || CPU == SIMLINUX+}
+    {+  /* Vxsim requires a specially compiled handler.  */+}
+    {+  void __gnat_sigtramp_vxsim  (int signo, void *siginfo, void *sigcontext,+}
+    {+                       __sigtramphandler_t * handler);+}
+    {+#else+}
+      void __gnat_sigtramp  (int signo, void *siginfo, void *sigcontext,
+                             __sigtramphandler_t * handler);
+    {+#endif+}
+    
+    diff --git ./gcc/ada/gcc-interface/Makefile.in ./gcc/ada/gcc-interface/Makefile.in
+    @@ -923,13 +928,49 @@ ifeq ($(strip $(filter-out %86 wrs vxworks vxworks7,$(target_cpu) $(target_vendo
+    {+  VXSIM_CPU =+}
+    
+    {+  ifeq ($(strip $(filter-out vxworks rtp rtp-smp,$(target_os) $(THREAD_KIND))),)+}
+    {+      VXSIM_CPU = SIMPENTIUM+}
+    {+  else+}
+    {+    ifeq ($(strip $(filter-out kernel kernel-smp rtp rtp-smp,$(THREAD_KIND))),)+}
+    {+      ifeq ($(strip $(filter-out linux%,$(host_os))),)+}
+    {+        # Linux+}
+    {+        VXSIM_CPU = SIMLINUX+}
+    {+      else+}
+    {+        # Windows+}
+    {+        VXSIM_CPU = SIMNT+}
+    {+      endif+}
+    {+    endif+}
+    
+    diff --git ./gcc/ada/gcc-interface/Makefile.in ./gcc/ada/gcc-interface/Makefile.in
+    @@ -2413,6 +2468,14 @@ ifeq ($(filter a-except%,$(LIBGNAT_TARGET_PAIRS)),)
+    {+# Configuration of host tools+}
+    
+    {+# Under linux, host tools need to be linked with -ldl+}
+    
+    {+ifeq ($(strip $(filter-out linux%,$(host_os))),)+}
+    {+   TOOLS1_LIBS=-ldl+}
+    {+endif+}
+    
+    diff --git ./gcc/ada/s-osinte-linux.ads ./gcc/ada/s-osinte-linux.ads
+    @@ -224,6 +224,10 @@ package System.OS_Interface is
+       {+function clock_gettime+}
+    {+     (clock_id : clockid_t; tp : access timespec) return int;+}
+    {+   pragma Import (C, clock_gettime, "clock_gettime");+}
+    
+    diff --git ./gcc/ada/s-taprop-linux.adb ./gcc/ada/s-taprop-linux.adb
+    @@ -39,7 +39,6 @@ pragma Polling (Off);
+    with Interfaces.C;
+    [-with Interfaces.C.Extensions;-]
+    @@ -64,7 +63,6 @@ package body System.Task_Primitives.Operations is
+       use Interfaces.C;
+    [-   use Interfaces.C.Extensions;-]
+    @@ -629,30 +627,14 @@ package body System.Task_Primitives.Operations is
+       function Monotonic_Clock return Duration is
+          [-use Interfaces;-]
+    
+    [-      procedure timeval_to_duration-]
+    [-        (T    : not null access timeval;-]
+    [-         sec  : not null access C.Extensions.long_long;-]
+    [-         usec : not null access C.long);-]
+    [-      pragma Import (C, timeval_to_duration, "__gnat_timeval_to_duration");-]
+    
+    [-      Micro  : constant := 10**6;-]
+    [-      sec    : aliased C.Extensions.long_long;-]
+    [-      usec   : aliased C.long;-]
+    [-      TV-]{+TS+}     : aliased [-timeval;-]{+timespec;+}
+          Result : int;
+    
+    [-      function gettimeofday-]
+    [-        (Tv : access timeval;-]
+    [-         Tz : System.Address := System.Null_Address) return int;-]
+    [-      pragma Import (C, gettimeofday, "gettimeofday");-]
+    
+       begin
+          Result := [-gettimeofday (TV'Access, System.Null_Address);-]{+clock_gettime+}
+    {+        (clock_id => OSC.CLOCK_RT_Ada, tp => TS'Unchecked_Access);+}
+          pragma Assert (Result = 0);
+    [-timeval_to_duration (TV'Access, sec'Access, usec'Access);-]
+          return [-Duration (sec) + Duration (usec) / Micro;-]{+To_Duration (TS);+}
+       end Monotonic_Clock;
+
+
+    diff --git ./gcc/ada/adaint.c ./gcc/ada/adaint.c
+    @@ -3220,6 +3220,107 @@ __gnat_kill (int pid, int sig, int close ATTRIBUTE_UNUSED)
+    #endif
+    }
+    
+    {+void __gnat_killprocesstree (int pid, int sig_num)+}
+    {+{+}
+    {+[...]+}
+    {+#elif defined (__linux__)+}
+    {+  DIR *dir;+}
+    {+  struct dirent *d;+}
+    
+    {+  /*  read all processes' pid and ppid */+}
+    
+    {+  dir = opendir ("/proc");+}
+    {+[...]+}
+    {+  /* kill process */+}
+    
+    {+  __gnat_kill (pid, sig_num, 1);+}
+    {+#else+}
+    {+  __gnat_kill (pid, sig_num, 1);+}
+    {+#endif+}
+    {+[...]+}
+    {+}+}
+
+    diff --git ./gcc/ada/s-os_lib.ads ./gcc/ada/s-os_lib.ads
+    @@ -740,6 +744,19 @@ package System.OS_Lib is
+    {+   procedure Kill_Process_Tree (Pid : Process_Id; Hard_Kill : Boolean := True);+}
+    {+   --  Kill the process designated by Pid and all it's children processes.+}
+    {+   --  [...]
+    {+   --  Note that this routine is not atomic and is supported only on Linux+}
+    {+   --  and Windows. On other OS it will only kill the process identified by+}
+    {+   --  Pid.+}
+
 GCC includes (TODO: some version of) the Ada Conformity Assessment Test Suite
 (ACATS), <http://ada-auth.org/acats.html>.  Additional tests to be found at
 <http://ada-auth.org/submit.html>.  TODO: results?
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