From 44c2ce84e01c82f1a29f610167fe793796ffd48d Mon Sep 17 00:00:00 2001
From: Thomas Schwinge <thomas@codesourcery.com>
Date: Mon, 29 Sep 2014 10:49:29 +0200
Subject: open_issues/gcc: f91948d1bd857c81bb2cea688457b84fa3ce6b84
 (2014-09-26; d3faa4b6d102b09a5ea17bbf81590f215b42fbc4 (2014-09-26)), GCC 4.9.

---
 open_issues/gcc.mdwn            | 321 ++++++++++++++++++++++------------------
 open_issues/gcc/libmudflap.mdwn |  74 ---------
 2 files changed, 177 insertions(+), 218 deletions(-)
 delete mode 100644 open_issues/gcc/libmudflap.mdwn

(limited to 'open_issues')

diff --git a/open_issues/gcc.mdwn b/open_issues/gcc.mdwn
index 45590928..57de9a6d 100644
--- a/open_issues/gcc.mdwn
+++ b/open_issues/gcc.mdwn
@@ -31,14 +31,14 @@ example.  Especially all the compiler magic is all the same.
 <!--
 
 git checkout reviewed
-git diff --patience --stat=$COLUMNS,$COLUMNS --patch --src-prefix=./ --dst-prefix=./ --find-renames --ignore-space-change ..upstream/master | awk '/^diff/ { c = $0; } /^@@/ { print c; } { print; }' | less
+git diff --patience --stat=$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[^/]*)$|hurd|linux|nacl|nptl|glibc|gs:
+/^---.*/([^.]*|.*\.texi.*|[^/]*gnu[^/]*|libgo/go/(net/sock_bsd\.go|syscall/exec_bsd\.go|syscall/libcall_posix\.go))$|hurd|linux|nacl|nptl|glibc($|[^x]|x[^x]|x$)|gs:|dg-runtest
 
 -->
 
-Last reviewed up to the [[Git mirror's 3a930d3fc68785662f5f3f4af02474cb21a62056
-(2013-06-06) sources|source_repositories/gcc]].
+Last reviewed up to the [[Git mirror's d3faa4b6d102b09a5ea17bbf81590f215b42fbc4
+(2014-09-26) sources|source_repositories/gcc]].
 
 <http://gcc.gnu.org/install/configure.html> has documentation for the
 `configure` switches.
@@ -61,7 +61,8 @@ Last reviewed up to the [[Git mirror's 3a930d3fc68785662f5f3f4af02474cb21a62056
             rename to `gnu-user` to reflect this?  TODO.
 
       * `gcc/acinclude.m4`:`gcc_GAS_FLAGS`: always pass `--32` to assembler for
-        x86 Linux.  (Why?)
+        x86 Linux.  Probably we should just do the same, see `*-*-linux*`
+        comment in [[!message-id "87zjrjcasc.fsf@schwinge.name"]].
 
       * `lib-prefix.m4` (present twice in GCC sources) contains one remaining
         `linux`-only case.
@@ -277,12 +278,17 @@ Last reviewed up to the [[Git mirror's 3a930d3fc68785662f5f3f4af02474cb21a62056
 
       * `libgcc`
 
-        TODO:
-
           * `config/t-linux`
           * `config/i386/t-linux`
+
+        TODO, rename to `t-gnu-user`.
+
           * `config/i386/linux-unwind.h`
 
+        TODO, probably needs porting, if we need this.
+        [[!GCC_PR 57851 desc="[patch] unwinding via signal trampoline for
+        kfreebsd*-gnu"]].
+
       * `libitm`
 
         TODO:
@@ -299,10 +305,33 @@ Last reviewed up to the [[Git mirror's 3a930d3fc68785662f5f3f4af02474cb21a62056
       * Eventually: get rid of this special-casing.  [[!message-id
         "gckk1s$e0b$1@ger.gmane.org"]].
 
-  * [[`libmudflap`|libmudflap]].
-
   * [`-fsplit-stack`](http://nickclifton.livejournal.com/6889.html)
 
+        #define TARGET_CAN_SPLIT_STACK
+        #define TARGET_THREAD_SPLIT_STACK_OFFSET 0x30
+
+        libgcc/config/i386/morestack.S
+        libgcc/config/i386/t-stack-i386
+        libgcc/config/t-stack
+        libgcc/generic-morestack-thread.c
+        libgcc/generic-morestack.c
+        libgcc/generic-morestack.h
+        libgcc/config/i386/morestack.S:	cmpl	%gs:0x30,%eax		# See if we have enough space.
+        libgcc/config/i386/morestack.S:	# gcc/config/i386/linux.h.
+        libgcc/config/i386/morestack.S:	movl	%eax,%gs:0x30		# Save the new stack boundary.
+        libgcc/config/i386/morestack.S:	movl	%eax,%gs:0x30		# Save the new stack boundary.
+        libgcc/config/i386/morestack.S:	movl	%ecx,%gs:0x30		# Save new stack boundary.
+        libgcc/config/i386/morestack.S:	# gcc/config/i386/linux64.h.
+        libgcc/config/i386/morestack.S:	movl	%eax,%gs:0x30
+        libgcc/config/i386/morestack.S:	movl	%gs:0x30,%eax
+        libgcc/config/i386/morestack.S:	movl	%eax,%gs:0x30
+        libgcc/generic-morestack-thread.c:   can build glibc.  */
+        libgcc/generic-morestack-thread.c:   not be necessary if glibc supports -fsplit-stack directly.  */
+        libgcc/generic-morestack.c:   can build glibc.  */
+        libgcc/generic-morestack.c:     since stack splitting only works on GNU/Linux anyhow.  */
+        libgcc/generic-morestack.c:#if defined(__GLIBC__) && defined(__linux__)
+        libgcc/generic-morestack.c:  /* In glibc, the first two real time signals are used by the NPTL
+
     IRC, freenode, #hurd, 2014-01-10:
 
         <gnu_srs1> Hi, I assume gcc -fsplit-stack is not yet supported?
@@ -362,8 +391,7 @@ Last reviewed up to the [[Git mirror's 3a930d3fc68785662f5f3f4af02474cb21a62056
       * Might `-fsplit-stack` be useful for us with respect to our
         [[multithreaded|multithreading]] libraries?
 
-  * `gcc/ada`, `gcc/testsuite/ada`, `gcc/testsuite/gnat.dg`, `gnattools`,
-    `libada` (not reviewed)
+  * `gcc/ada` (not all reviewed)
 
       * [[Ada (GNAT)|GNAT]] support is work in progress.
 
@@ -416,8 +444,6 @@ Last reviewed up to the [[Git mirror's 3a930d3fc68785662f5f3f4af02474cb21a62056
         commit a204f0622242865ffea889bd698bc7c7bd236bd1), commit
         05c1aa95e6c37b3b281d749c76c673392941a031.
 
-  * Check before/after Joseph changes.  (Should be fine.)
-
   * 34618b3190c110b8926cc2b1db4b4eac95451995 »config-list.mk«
 
     What's this used for?  (Check ML.)  Ask to include i686-pc-gnu (once it is
@@ -599,8 +625,131 @@ Last reviewed up to the [[Git mirror's 3a930d3fc68785662f5f3f4af02474cb21a62056
 
     A lot of Linux-specific things.
 
+  * 30f690e026ecdf99c68e777a48562b58afe37f43 `TARGET_LIBC_HAS_FUNCTION`.  Where
+    is `targetm` set?  All TARGET_C99_FUNCTIONS and TARGET_HAS_SINCOS gone?
+
+  * `libvtv`
+
+      * Disabled in `configure.tgt`.
+
+      * `libvtv/vtv_rts.cc`: `if (strcmp (info->dlpi_name, "linux-vdso.so.1")
+        == 0)` -- not a problem for us, but...
+
+      * `libvtv/vtv_rts.cc`: `/proc/self/exe` usage, `PATH_MAX`.
+
+  * ./libgomp/testsuite/libgomp.c/affinity-1.c Linux usage
+
   * `libcilkrts`
 
+    Disabled for Hurd.
+
+    libcilkrts/Makefile.am:
+
+        +# If we're building on Linux, use the Linux version script
+        +if LINUX_LINKER_SCRIPT
+        +    libcilkrts_la_LDFLAGS += -Wl,--version-script,$(srcdir)/runtime/linux-symbols.ver
+        +endif
+
+    libcilkrts/configure.ac:
+
+        +# We have linker scripts for appropriate operating systems
+        +linux_linker_script=no
+        +case "${host}" in
+        +    *-*-linux*)
+        +        linux_linker_script=yes
+        +        ;;
+        +esac
+        +AM_CONDITIONAL(LINUX_LINKER_SCRIPT, test "$linux_linker_script" = "yes")
+
+    libcilkrts/runtime/cilk_malloc.c:
+
+        +#if defined _WIN32 || defined _WIN64 || defined __linux__
+        +#include <malloc.h>
+        +#define HAS_MEMALIGN 1
+        +#endif
+
+    libcilkrts/runtime/config/x86/cilk-abi-vla.c:
+
+        +#if defined(__x86_64)
+        +    // For Intel64 linux & MACH ABI, all the parameters were passed in
+        +    // register, so top of the stack frame above the return address
+        +    // is just the size of the return address plus
+        +    // distance_from_sp_to_alloca_area on the chance that the alloca
+        +    // area isn't at the very bottom of the calling functions stack.
+        +#elif defined(__MACH__)
+        +    // For ia32 MACH, parameter size is always a mutliple of 16
+        +    // bytes to keep the stack 16 byte aligned.  So we need to round
+        +    // number of parameters up to multiple of 4.
+        +    param_size = 8 * sizeof(char *);
+        +#else
+        +    // For both windows Intel64 ABI, and the IA32 windows and
+        +    // linux ABIs, space is reserved on the stack for all these
+        +    // parameters.  param_size is 5 * size of a stack slot.
+        +    param_size = 5 * sizeof(char *);
+        +#endif
+
+        +#if defined(__x86_64)
+        +            // For Intel64 linux & MACH ABI, all the parameters were passed in
+        +            // register, so top of the stack frame above the return address
+        +            // is just the size of the return address plus
+        +            // distance_from_sp_to_alloca_area on the chance that the alloca
+        +            // area isn't at the very bottom of the calling functions stack.
+        +#elif defined(__MACH__)
+        +            // For ia32 MACH, parameter size is always a mutliple of 16
+        +            // bytes to keep the stack 16 byte aligned.  So we need to round
+        +            // number of parameters up to multiple of 4.
+        +            param_size = 8 * sizeof(char *);
+        +#else
+        +            // For both windows Intel64 ABI, and the IA32 windows and
+        +            // linux ABIs, space is reserved on the stack for all these
+        +            // parameters.  param_size is 5 * size of a stack slot.
+        +            param_size = 6 * sizeof(char *);
+        +#endif
+
+    libcilkrts/runtime/os-unix.c:
+
+        +#ifdef __linux__
+        +    // define _GNU_SOURCE before *any* #include.
+        +    // Even <stdint.h> will break later #includes if this macro is not
+        +    // already defined when it is #included.
+        +#   define _GNU_SOURCE
+        +#endif
+
+        +#if defined __linux__
+        +#   include <sys/sysinfo.h>
+        +#   include <sys/syscall.h>
+
+    Syscall usage outside __linux__?
+
+    Will run into:
+
+        +#else
+        +#error "Unknown architecture"
+
+    libcilkrts/runtime/sysdep-unix.c:
+
+        +#ifdef __linux__
+        +    // define _GNU_SOURCE before *any* #include.
+        +    // Even <stdint.h> will break later #includes if this macro is not
+        +    // already defined when it is #included.
+        +#   define _GNU_SOURCE
+        +#endif
+
+        +#ifdef __linux__
+        +#   include <sys/resource.h>
+        +#   include <sys/sysinfo.h>
+        +#endif
+
+        +#if defined( __linux__) || defined(__VXWORKS__)
+        +    pthread_t tid = *(pthread_t *)thread_id;
+        +    if (i < 0 || i > g->total_workers)
+        +        return 0;
+        +    return g->sysdep->threads[i] == tid;
+        +#else
+        +    // Needs to be implemented
+        +    return 0;
+        +#endif
+
     IRC, freenode, #hurd, 2014-01-10:
 
         <youpi> bwaarf, libcilkrts in gcc-4.9
@@ -612,42 +761,22 @@ Last reviewed up to the [[Git mirror's 3a930d3fc68785662f5f3f4af02474cb21a62056
           <http://news.gmane.org/find-root.php?message_id=%3C87wqjjo5kx.fsf%40kepler.schwinge.homeip.net%3E>
           resolved, actually.
 
-    [[!debbug 734973]].
-
-  * `WCONTINUED`
-
-    IRC, OFTC, #debian-hurd, 2014-02-25:
-
-        <gnu_srs> youpi: some gcc-4.9 packages (and source) are needed for
-          gnat-4.9 to build: Is it OK to propose this patch:
-          http://paste.debian.net/84079/
-          --- a/src/gcc/lto_lto.c.orig    2014-02-14 19:22:14.000000000 +0100
-          +++ b/src/gcc/lto/lto.c 2014-02-25 20:50:20.000000000 +0100
-          @@ -2476,7 +2476,11 @@
-             int status;
-             do
-               {
-          +#ifdef __GNU__
-          +      int w = waitpid(0, &status, WUNTRACED);
-          +#else
-                 int w = waitpid(0, &status, WUNTRACED | WCONTINUED);
-          +#endif
-                 if (w == -1)
-                  fatal_error ("waitpid failed");
-        <youpi> gnu_srs: rather ifndef WCONTINUED
+    [[!debbug 734973]].  gcc-4.9/debian/patches/libcilkrts-targets.diff
 
+  * Debian GCC 48594516135e34a726cafe3863a4dc661bbd61a4 `boehm-gc: use
+    anonymous mmap instead of brk also on hurd-*.`.  [[!debbug 753791]].
 
 
 # Build
 
 Here's a log of a GCC build run; this is from our [[Git repository's
-2a3496bebfe9d89f11d0b7a591afac55e11d5263 (2013-06-06;
-3a930d3fc68785662f5f3f4af02474cb21a62056 (2013-06-06))
+f91948d1bd857c81bb2cea688457b84fa3ce6b84 (2014-09-26;
+d3faa4b6d102b09a5ea17bbf81590f215b42fbc4 (2014-09-26))
 sources|source_repositories/gcc]], run on kepler.SCHWINGE and laplace.SCHWINGE.
 
     $ export LC_ALL=C
     $ (cd ../master/ && contrib/gcc_update --touch)
-    $ ../master/configure --prefix="$PWD".install SHELL=/bin/dash CC=gcc-4.6 CXX=g++-4.6 --enable-languages=all,ada 2>&1 | tee log_build
+    $ ../master/configure --prefix="$PWD".install SHELL=/bin/dash CC=gcc-4.9 CXX=g++-4.9 --enable-languages=all,ada 2>&1 | tee log_build
     [...]
     $ make 2>&1 | tee log_build_
     [...]
@@ -655,11 +784,8 @@ sources|source_repositories/gcc]], run on kepler.SCHWINGE and laplace.SCHWINGE.
 Different hosts may default to different shells and compiler versions; thus
 harmonized.
 
-We're stuck with GCC 4.6 until there are Debian
-*gnat-4.7*/*gnat-4.8*/*gnat-4.9* packages avaible.  (Which there now are.)
-
-This takes up around 3.5 GiB, and runs for [[3 h 22 min|performance#measure]]
-on kepler.SCHWINGE and [[3 h 44 min|performance#measure]] on laplace.SCHWINGE.
+This takes up around 4 GiB, and runs for [[4 h 48 min|performance#measure]] on
+kepler.SCHWINGE and [[5 h 10 min|performance#measure]] on laplace.SCHWINGE.
 
 <!--
 
@@ -691,6 +817,8 @@ on kepler.SCHWINGE and [[3 h 44 min|performance#measure]] on laplace.SCHWINGE.
     Comes from `gcc/config.gcc`: `i386/t-pmm_malloc` vs. `i386/t-gmm_malloc`
     for `i[34567]86-*-linux*` vs. `i[34567]86-*-*`.
 
+    2004-08-03, PR target/16570, id:20040802163509.GA18487@lucon.org
+
   * `libgomp`
 
       * `libgomp/config/linux`, `libgomp/config/linux/x86`
@@ -813,7 +941,7 @@ on kepler.SCHWINGE and [[3 h 44 min|performance#measure]] on laplace.SCHWINGE.
     [...]
 
 This takes up around 1.1 GiB, and runs for [[3 min|performance#measure]] on
-kepler.SCHWINGE and [[12 min|performance#measure]] on laplace.SCHWINGE.
+kepler.SCHWINGE and [[13 min|performance#measure]] on laplace.SCHWINGE.
 
 
 ## Analysis
@@ -842,21 +970,14 @@ TODO.  On GNU/Hurd, it is advisable to reboot after having built and installed
 GCC, before running the testsuite, as otherwise there seems to be a tendency
 that the system crashes during the `gcc.c-torture/compile/limits-structnest.c`
 tests, which are rather memory hungry, see [[!message-id
-"87bol6aixd.fsf@schwinge.name"]].  Likewise, it also seems advisable to add
-further reboots in between, that is, separate `make check`'s `check-host` into
-several separate runs, and then one for `check-target` (see
-`[build]/Makefile:do-check`, `[build]/gcc/Makefile:CHECK_TARGETS`), as
-otherwise there seems to be a tendency for the system crashing sooner or later.
-(Running `check-host` accumulates to something like 44 hours worth of
-forking/execing of GCC and testcases.)  On GNU/Linux we run it in one go, so
-that we'll catch any fundamental rearrangements of/additions to the testsuites.
+"87bol6aixd.fsf@schwinge.name"]].
 
 
     $ make -k check 2>&1 | tee log_test
     [...]
 
-This runs for [[7 h 35 min|performance#measure]] on kepler.SCHWINGE and [[15 h
-46 min|performance#measure]] on laplace.SCHWINGE.
+This runs for [[10 h 46 min|performance#measure]] on kepler.SCHWINGE and [[18 h
+10 min|performance#measure]] on laplace.SCHWINGE.
 
 
 ## Analysis
@@ -1004,90 +1125,6 @@ This runs for [[7 h 35 min|performance#measure]] on kepler.SCHWINGE and [[15 h
 
     TODO.
 
-  * `[ARCH]/libmudflap`
-
-        spawn [open ...]
-        FAIL: libmudflap.cth/pass37-frag.c (-O0) execution test
-        FAIL: libmudflap.cth/pass37-frag.c (-O0) output pattern test
-
-        FAIL: libmudflap.cth/pass37-frag.c (-O0) (rerun 1) execution test
-        FAIL: libmudflap.cth/pass37-frag.c (-O0) (rerun 1) output pattern test
-        [...]
-
-    TODO.  Seems like not just timeouts (though, reported before: [[!GCC_PR
-    20003]]).  If GDB is to believed, it seems like confusion between
-    libmudflap and glibc startup (while setting up the signal thread?):
-
-        #0  getenv (name=0x12dabee "LANGUAGE") at getenv.c:81
-        #1  0x011b2c78 in guess_category_value (categoryname=<optimized out>, category=<optimized out>) at dcigettext.c:1359
-        #2  __dcigettext (domainname=0x12dab1b <_libc_intl_domainname> "libc", msgid1=0x12e1cd8 "Error in unknown error system: ", msgid2=0x0, plural=0, n=0, category=5) at dcigettext.c:575
-        #3  0x011b1c53 in __dcgettext (domainname=0x12dab1b <_libc_intl_domainname> "libc", msgid=0x12e1cd8 "Error in unknown error system: ", category=5) at dcgettext.c:53
-        #4  0x01203728 in __strerror_r (errnum=-1, buf=0x15ff648 "", buflen=1024) at ../sysdeps/mach/_strerror.c:57
-        #5  0x011b0f30 in __assert_perror_fail (errnum=-1, file=0x1133969 "./pthread/cthreads-compat.c", line=45, function=0x1133985 <__PRETTY_FUNCTION__.5356> "cthread_fork") at assert-perr.c:62
-        #6  0x011324d4 in cthread_fork (func=0x118b0b0 <_hurd_msgport_receive>, arg=0x0) at ./pthread/cthreads-compat.c:45
-        #7  0x01192a96 in _hurdsig_init (intarray=0x102a000, intarraysize=5) at hurdsig.c:1499
-        #8  0x0117b9f8 in _hurd_new_proc_init (argv=0x15ffb88, intarray=0x102a000, intarraysize=5) at hurdinit.c:138
-        #9  0x0117bfef in _hurd_init (flags=8, argv=0x15ffb88, portarray=0x1029000, portarraysize=6, intarray=0x102a000, intarraysize=5) at hurdinit.c:94
-        #10 0x011a47c4 in init1 (argc=1, arg0=0x1025000 "/media/erich/home/thomas/tmp/gcc/hurd/master.build/i686-unknown-gnu0.3/libmudflap/testsuite/pass37-frag.exe") at ../sysdeps/mach/hurd/i386/init-first.c:136
-        #11 0x00001ec6 in _dl_start_user () from /lib/ld.so
-
-    pthread/cthreads-compat.c:
-
-            38  cthread_t
-            39  cthread_fork (cthread_fn_t func, void *arg)
-            40  {
-            41    pthread_t thread;
-            42    int err;
-            43
-            44    err = pthread_create (&thread, NULL, func, arg);
-            45    assert_perror (err);
-
-        Breakpoint 2, cthread_fork (func=0x118b0b0 <_hurd_msgport_receive>, arg=0x0) at ./pthread/cthreads-compat.c:44
-        44        err = pthread_create (&thread, NULL, func, arg);
-        (gdb) info threads 
-          Id   Target Id         Frame 
-        * 4    Thread 17597.16   cthread_fork (func=0x118b0b0 <_hurd_msgport_receive>, arg=0x0) at ./pthread/cthreads-compat.c:44
-        (gdb) s
-        40      {
-        (gdb) 
-        44        err = pthread_create (&thread, NULL, func, arg);
-        (gdb) 
-        
-        Breakpoint 1, pthread_create (thr=0x15ffa70, attr=0x0, start=0x118b0b0 <_hurd_msgport_receive>, arg=0x0) at ../../../master/libmudflap/mf-hooks3.c:272
-        272     {
-        (gdb) s
-        275       TRACE ("pthread_create\n");
-        (gdb) 
-        278       si = CALL_REAL (malloc, sizeof (*si));
-        (gdb) n
-        279       si->user_fn = start;
-        (gdb) 
-        283       return CALL_REAL (pthread_create, thr, attr, __mf_pthread_spawner, si);
-        (gdb) s
-        279       si->user_fn = start;
-        (gdb) 
-        280       si->user_arg = arg;
-        (gdb) 
-        283       return CALL_REAL (pthread_create, thr, attr, __mf_pthread_spawner, si);
-        (gdb) 
-        280       si->user_arg = arg;
-        (gdb) 
-        283       return CALL_REAL (pthread_create, thr, attr, __mf_pthread_spawner, si);
-        (gdb) 
-        __mf_0fn_pthread_create (thr=thr@entry=0x15ffa70, attr=attr@entry=0x0, start=start@entry=0x1041070 <__mf_pthread_spawner>, arg=arg@entry=0x108e520 <__mf_0fn_bufs+12288>) at ../../../master/libmudflap/mf-hooks3.c:265
-        265     }
-        (gdb) s
-        pthread_create (thr=0x15ffa70, attr=0x0, start=0x118b0b0 <_hurd_msgport_receive>, arg=0x0) at ../../../master/libmudflap/mf-hooks3.c:284
-        284     }
-        (gdb) s
-        cthread_fork (func=0x118b0b0 <_hurd_msgport_receive>, arg=0x0) at ./pthread/cthreads-compat.c:45
-        45        assert_perror (err);
-        (gdb) s
-        __assert_perror_fail (errnum=-1, file=0x1133969 "./pthread/cthreads-compat.c", line=45, function=0x1133985 <__PRETTY_FUNCTION__.5356> "cthread_fork") at assert-perr.c:55
-
-    Is this `libmudflap/mf-hooks3.c:__mf_0fn_pthread_create`, *a special
-    bootstrap variant*, that indeed just returns `-1`?
-
   * `[ARCH]/libstdc++-v3`
 
         FAIL: libstdc++-abi/abi_check
@@ -1202,11 +1239,7 @@ This runs for [[7 h 35 min|performance#measure]] on kepler.SCHWINGE and [[15 h
     GCC DejaGnu's `remote.exp:remote_wait` to get rid of (that is, ignore) its
     `timeout` parameter which, in DejaGnu code, is often invoked with a
     hard-coded value (that we may want to override) (or is that what
-    `gcc/testsuite/lib/timeout.exp:standard_wait` is for?).  While at it,
-    `libmudflap/testsuite/libmudflap.c++/ctors.exp` and
-    `libmudflap/testsuite/libmudflap.c/externs.exp` use hard-coded timeout
-    values in `remote_wait` calls (also, why don't these use the usual way of
-    running tests?).
+    `gcc/testsuite/lib/timeout.exp:standard_wait` is for?).
 
   * What is `gcc/testsuite/gcc.test-framework/test-framework.exp` and should we
     define `CHECK_TEST_FRAMEWORK` to run these tests?
diff --git a/open_issues/gcc/libmudflap.mdwn b/open_issues/gcc/libmudflap.mdwn
deleted file mode 100644
index f14ca1bc..00000000
--- a/open_issues/gcc/libmudflap.mdwn
+++ /dev/null
@@ -1,74 +0,0 @@
-[[!meta copyright="Copyright © 2008, 2009 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
-document under the terms of the GNU Free Documentation License, Version 1.2 or
-any later version published by the Free Software Foundation; with no Invariant
-Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
-is included in the section entitled
-[[GNU Free Documentation License|/fdl]]."]]"""]]
-
-[[!tag open_issue_porting open_issue_gcc]]
-
-Single-threaded use appears to work:
-
-    $ echo 'int main(void) { int *a; a[10]=0; return a[5]; }' | ↩
-      gcc -o a -fmudflap -x c - -lmudflap
-    $ ./a
-    *******
-    mudflap violation 1 (check/write): time=1227208721.922064 ptr=0x1023de0 size=4
-    pc=0x1037a33 location=`<stdin>:1:26 (main)'
-          /usr/lib/libmudflap.so.0(__mf_check+0x33) [0x1037a33]
-          ./a(main+0x7c) [0x80486c4]
-          /usr/lib/libmudflap.so.0(__wrap_main+0x49) [0x1037239]
-    Nearby object 1: checked region begins 68B before and ends 65B before
-    mudflap object 0x80ca268: name=`argv[]'
-    bounds=[0x1023e24,0x1023e2b] size=8 area=static check=0r/0w liveness=0
-    alloc time=1227208721.922064 pc=0x10371d3
-    Nearby object 2: checked region begins 76B before and ends 73B before
-    mudflap object 0x80cb448: name=`environ[]'
-    bounds=[0x1023e2c,0x1023ed7] size=172 area=static check=0r/0w liveness=0
-    alloc time=1227208721.922064 pc=0x10371d3
-    number of nearby objects: 2
-    *******
-    mudflap violation 2 (check/read): time=1227208721.942109 ptr=0x1023dcc size=4
-    pc=0x1037a33 location=`<stdin>:1:35 (main)'
-          /usr/lib/libmudflap.so.0(__mf_check+0x33) [0x1037a33]
-          ./a(main+0xf3) [0x804873b]
-          /usr/lib/libmudflap.so.0(__wrap_main+0x49) [0x1037239]
-    Nearby object 1: checked region begins 88B before and ends 85B before
-    mudflap object 0x80ca268: name=`argv[]'
-    Nearby object 2: checked region begins 96B before and ends 93B before
-    mudflap object 0x80cb448: name=`environ[]'
-    number of nearby objects: 2
-
-Multi-threaded use doesn't:
-
-    $ echo 'int main(void) { int *a; a[10]=0; return a[5]; }' | ↩
-      gcc -include pthread.h -o a -fmudflapth -x c - -lmudflapth -lpthread
-    $ ./a 
-    Killed
-    $ gdb a
-    [...]
-    Starting program: /media/data/home/tschwinge/a 
-    
-    Program received signal EXC_BAD_ACCESS, Could not access memory.
-    0x01180653 in getenv () from /lib/libc.so.0.3
-    (gdb) bt
-    #0  0x01180653 in getenv () from /lib/libc.so.0.3
-    #1  0x01177a02 in __dcigettext () from /lib/libc.so.0.3
-    #2  0x01176a57 in dcgettext () from /lib/libc.so.0.3
-    #3  0x011c03b5 in strerror_r () from /lib/libc.so.0.3
-    #4  0x01175b57 in __assert_perror_fail () from /lib/libc.so.0.3
-    #5  0x0111f1ad in cthread_fork (func=0x114f630 <_hurd_msgport_receive>, arg=0x0)
-        at /build/buildd/hurd-20080607/build-tree/hurd/libpthread/pthread/cthreads-compat.c:41
-    #6  0x0115713e in _hurdsig_init () from /lib/libc.so.0.3
-    #7  0x01140852 in _hurd_proc_init@@GLIBC_2.2.6 () from /lib/libc.so.0.3
-    #8  0x01140e86 in _hurd_init () from /lib/libc.so.0.3
-    #9  0x011690ce in init1 () from /lib/libc.so.0.3
-    #10 0x00001e96 in _dl_start_user () from /lib/ld.so
-    #11 0x00000001 in ?? ()
-    #12 0x01024000 in ?? ()
-    #13 0x00000000 in ?? ()
-
-Also `libmudflap` is pthread-only.
-- 
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