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+[[!meta copyright="Copyright © 2007, 2008, 2010, 2011 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_glibc]]
+
+Here's what's to be done for maintaining glibc.
+
+[[!toc levels=2]]
+
+
+# [[General information|/glibc]]
+
+
+# [[Sources|source_repositories/glibc]]
+
+
+# [[Debian]] Cheat Sheet
+
+
+# Configuration
+
+Last reviewed up to the [[Git mirror's 16292eddd77f66002e2104848e75a0fb4d316692
+(2011-08-04) sources|source_repositories/glibc]].
+
+  * t/dup3
+
+    [[tschwinge]] is not convinced that
+    22542dcc89805af8d9bd9209129259d2737372b5 (and then also
+    ff3f3a789ba08b656dbaa3901091b6410bb883f8) are correct.
+
+      * 94b7cc3711b0b74c1d3ae18b9a2e019e51a8e0bf -- dup3 changes; relevant for
+        `t/dup3`: hidden def.  ed690b2f24bbc4d9c541fc81a7c67e6dc5678a96 -- why
+        not for dup3, too?  Because it is a syscall (that is always inlined)?
+
+  * t/init-first.c
+
+    Have to revert 53b56b1101fc9bb4f295f23f54e7e19f8da8da16 to keep it working
+    with GCC 4.4.  Figure out what's going on.  Also see [[glibc_init_first]].
+
+  * t/tls
+
+      * Discuss d2431f633e6139a62e1575ec18830f7e81160cf0 with Samuel.
+
+      * `TLS_INIT_TP_EXPENSIVE` is unused; Hurd def. can be removed.
+
+  * t/verify.h
+
+    People didn't like this too much.
+
+    Other examples:
+
+      * 11988f8f9656042c3dfd9002ac85dff33173b9bd -- `static_assert`
+
+  * [[toolchain/cross-gnu]], without `--disable-multi-arch`
+
+        i686-pc-gnu-gcc ../sysdeps/i386/i686/multiarch/strcmp.S -c [...]
+        ../sysdeps/i386/i686/multiarch/../strcmp.S: Assembler messages:
+        ../sysdeps/i386/i686/multiarch/../strcmp.S:31: Error: symbol `strcmp' is already defined
+        make[2]: *** [/media/boole-data/thomas/tmp/gnu-0/src/glibc.obj/string/strcmp.o] Error 1
+        make[2]: Leaving directory `/media/boole-data/thomas/tmp/gnu-0/src/glibc/string'
+
+    Might simply be a missing patch(es) from master.
+
+  * --build=X
+
+    `long double` test: due to `cross_compiling = maybe` wants to execute a
+    file, which fails.  Thus `--build=X` has to be set.
+
+  * Check what all these are:
+
+        running configure fragment for sysdeps/mach/hurd
+        checking Hurd header version... ok
+        running configure fragment for sysdeps/mach
+        checking for i586-pc-gnu-mig... i586-pc-gnu-mig
+        checking for mach/mach_types.h... yes
+        checking for mach/mach_types.defs... yes
+        checking for task_t in mach/mach_types.h... task_t
+        checking for thread_t in mach/mach_types.h... thread_t
+        checking for creation_time in task_basic_info... yes
+        checking for mach/mach.defs... yes
+        checking for mach/mach4.defs... yes
+        checking for mach/clock.defs... no
+        checking for mach/clock_priv.defs... no
+        checking for mach/host_priv.defs... no
+        checking for mach/host_security.defs... no
+        checking for mach/ledger.defs... no
+        checking for mach/lock_set.defs... no
+        checking for mach/processor.defs... no
+        checking for mach/processor_set.defs... no
+        checking for mach/task.defs... no
+        checking for mach/thread_act.defs... no
+        checking for mach/vm_map.defs... no
+        checking for mach/memory_object.defs... yes
+        checking for mach/memory_object_default.defs... yes
+        checking for mach/default_pager.defs... yes
+        checking for mach/i386/mach_i386.defs... yes
+        checking for egrep... grep -E
+        checking for host_page_size in mach_host.defs... no
+        checking for mach/machine/ndr_def.h... no
+        checking for machine/ndr_def.h... no
+        checking for i386_io_perm_modify in mach_i386.defs... yes
+        checking for i386_set_gdt in mach_i386.defs... yes
+        checking whether i586-pc-gnu-mig supports the retcode keyword... yes
+
+  * `elf/stackguard-macros.h`
+
+  * Verify 77c84aeb81808c3109665949448dba59965c391e against
+    `~/shared/glibc/make_TAGS.patch`.
+
+  * `HP_SMALL_TIMING_AVAIL` not defined anywhere.
+
+  * Unify `CPUCLOCK_WHICH` stuff in `clock_*` files.
+
+  * Not all tests are re-run in a `make -k tests; make tests-clean; make -k
+    tests` cycle.
+
+  * `CPUCLOCK_WHICH`, `t/cpuclock`
+
+        /media/boole-data/thomas/tmp/gnu-0/src/glibc.obj/rt/librt_pic.a(clock_settime.os): In function `clock_settime':
+        /media/boole-data/thomas/tmp/gnu-0/src/glibc/rt/../sysdeps/unix/clock_settime.c:113: undefined reference to `CPUCLOCK_WHICH'
+        /media/boole-data/thomas/tmp/gnu-0/src/glibc/rt/../sysdeps/unix/clock_settime.c:114: undefined reference to `CPUCLOCK_WHICH'
+        collect2: error: ld returned 1 exit status
+        make[2]: *** [/media/boole-data/thomas/tmp/gnu-0/src/glibc.obj/rt/librt.so] Error 1
+        make[2]: Leaving directory `/media/boole-data/thomas/tmp/gnu-0/src/glibc/rt'
+        make[1]: *** [rt/others] Error 2
+        make[1]: Leaving directory `/media/boole-data/thomas/tmp/gnu-0/src/glibc'
+        make: *** [all] Error 2
+
+  * Missing interfaces, amongst many more.
+
+    Many more are missing, some of which have been announced in `NEWS`, others
+    typically haven't (like new flags to existing functions).  Typically,
+    porters will notice missing functionaly.  But in case you're looking for
+    something to work on, here's a list.
+
+    `AT_EMPTY_PATH`, `CLOCK_BOOTTIME`, `CLOCK_BOOTTIME_ALARM`,
+    `CLOCK_REALTIME_ALARM`, `O_PATH`,
+    `PTRACE_*` (for example, cbff0d9689c4d68578b6a4f0a17807232506ea27),
+    `RLIMIT_RTTIME`, `SEEK_DATA` (`unistd.h`), `SEEK_HOLE` (`unistd.h`)
+    `clock_adjtime`, `fallocate`, `fallocate64`, `getcontext` (and
+    `setcontext`), `name_to_handle_at`, `open_by_handle_at`, `sendmmsg`,
+    `setns`, `sync_file_range`
+
+      * `syncfs`
+
+        We should be easily able to implement that one.
+
+      * `futimesat`, `readlinkat`, `renameat`
+
+        If we have all of 'em (check Linux kernel), `#define __ASSUME_ATFCTS`.
+
+      * `bits/stat.h [__USE_ATFILE]`: `UTIME_NOW`, `UTIME_OMIT`
+
+      * `io/fcntl.h [__USE_ATFILE]`
+
+        Do we support `AT_FDCWD` et al.?
+
+      * `MAP_POPULATE` (`mmap`, `sys/mman.h`)
+
+        Is only advisory, so can worked around with `#define 0`.
+
+  * Building with GCC 4.5, 4.6, trunk will cause different kinds of faults.
+
+  * Create `t/cleanup_kernel-features.h`.
+
+  * Add tests from Linux kernel commit messages for `t/dup3` et al.
+
+  * In `sysdeps/unix/sysv/linux/Makefile`, there are a bunch of
+    `-DHAVE_SENDFILE` -- but we do have `sendfile`, too.
+
+  * `/usr/include/pthread.h` overwrite issue
+
+    `make`, after editing `nss/nss_db/db-initgroups.c`:
+
+        [...]
+        make[2]: Leaving directory `/media/erich/home/thomas/tmp/glibc/tschwinge/Roger_Whittaker/resolv'
+        make  subdir=nss -C nss ..=../ others
+        make[2]: Entering directory `/media/erich/home/thomas/tmp/glibc/tschwinge/Roger_Whittaker/nss'
+        /usr/bin/install -c -m 644 ../include/pthread.h /usr/include/pthread.h
+        /usr/bin/install: cannot remove `/usr/include/pthread.h': Permission denied
+        make[2]: *** [/usr/include/pthread.h] Error 1
+        make[2]: Leaving directory `/media/erich/home/thomas/tmp/glibc/tschwinge/Roger_Whittaker/nss'
+        make[1]: *** [nss/others] Error 2
+        make[1]: Leaving directory `/media/erich/home/thomas/tmp/glibc/tschwinge/Roger_Whittaker'
+        make: *** [all] Error 2
+
+    See [[!message-id "871uv99c59.fsf@kepler.schwinge.homeip.net"]].  Passing
+    `install_root=/INVALID` to `make`/`make check` is a cheap cure.
+
+  * Verify baseline changes, if we need any follow-up changes:
+
+      * a11ec63713ea3903c482dc907a108be404191a02
+      * 7e2b0c8562b35155820f87b5ff02a8b6850344cc
+      * 8c0677fe5d91b7269364ca08fa08ed09e4c2d8c9
+      * 5a2a1d75043138e696222ced4560de2fb90b8024
+      * 5ae958d74180e2572d198bd7872c86f391de6da7
+      * 5b08ac571ff8e94fe96511a532f0d20997de5f52
+      * 3d04ff3a5d3ce3616837e1d15e03b6e1b360cf26
+      * b2ef2c014b9c66995a3eb4f310ae7c5c510279bf
+      * 63c4ed22b5048c8701d8806026c23cc95f0df756
+      * ac2b484c02b01307ab6bbe5d45ddbf16d64edf8c
+      * e35fcef8b739ed24e083ff8a3078ac14e101cf67
+      * 6fb8cbcb58a29fff73eb2101b34caa19a7f88eba
+      * 8a492a675e566dc1e666df0a86cbf541442cb179
+      * 5dbc3b6cc0b759bf4b22d851ccb9cbf3e3cbc6ef
+      * c86434ccb576a3ce35b5a74f72b9f03bd45b522a
+      * d22e4cc9397ed41534c9422d0b0ffef8c77bfa53
+      * 15bac72bac03faeb3b725b1d208c62160f0c3ad7
+      * c08fb0d7bba4015078406b28d3906ccc5fda9d5a
+      * 10b3bedcb03386cc280113f552479793e4bac35f
+      * 754f7da38b0904b4b989d3500cc8dd5be625cf6a
+      * 3cdaa6adb113a088fdfb87aa6d7747557eccc58d
+      * 962dba7828cf251a9025ccb43bc6effa30379b72
+      * 3162f12e58c3a848db883916843b332b9f8c9d39
+      * 1c06ba3100847da6bd1f2e011dc24fa8debd9615
+      * 84b9230c404aed4fd3a7bb3d045ca367043dde8c
+      * 090555538d4347a52807ba9f08cf20ed13206afe
+      * 817328eea788c746131cf151b64fd250200da333
+      * c3758feebf7c8786231465da664743c6f0ec79cc
+      * 1ac7a2c7b448c851eb8976fcc290a906a4075203
+      * c21cc9bcb38a87ff638d1099ca871d94a2192b31
+      * 6484ba5ef092b62b7d2112c0d976dbd6d1a40fde
+      * b8b4863d78bf26b39918fc753b03ed98ef262903
+      * b76b818e6fe2061e778b3a9bbe63c554c3f9b3c1
+      * 8e9f92e9d5d7737afdacf79b76d98c4c42980508 -- `_dl_map_object` in
+        `sysdeps/mach/hurd/dl-sysdep.c`
+      * 0e516e0e14f2f9783a21cd1727bc53776341f857
+      * a1fb5e3ebe9d38b5ae6c5bfbfaa04882d52355bc
+      * cf7c9078a5acdbb435498ace92cd81009637a971
+      * db753e2cfb2051ebf20dc089f87c5b1297cc2cff
+      * 4a531bb0b3b582cb693de9f76d2d97d970f9a5d5 -- looks good.
+      * 5bd6dc5c2c68fe98691db9b40f87d9b68ea9565b
+      * 451f001b50870604e1f2daef12f04f9f460d3997 +
+        a85b5cb4d4a5fc56e2b38638d270bf2daa67eb6c -- BZ10484.  `nptl/Versions
+        [libc] (GLIBC_PRIVATE): Export __libc_alloca_cutoff`.  We don't even
+        define it yet.  Also see
+        [[glibc___libc_alloca_cutoff_should_be_lowered]].
+      * 1086d70d916fd0eb969b3d89ff88abd35f6a5c34
+      * cfa28e560ef69372b9e15e9a2d924a0fbcfc7bca
+      * 8cf8ce1702c354a8266e3cfa6ab54c2467d1873f
+      * 68dc949774cb651d53541df4abdc60327f7e096b
+      * 70181fddf1467996bea393d13294ffe76b8a0853
+      * a77e8cbc394ab098aa1fc3f0a6645a38348d21ca
+      * 32465c3ea007065acd8ca8199f130cdf4068130d
+      * 18ba70a559c52719fd94a713cc380514d9d19125
+      * 620a05296fe3380b7441ba7720e8b25c48a8c28c
+      * [low] e6c61494125126d2ba77e5d99f83887a2ed49783 -- `Fix memory leak in
+        TLS of loaded objects.` Do we need to replicate `nptl/allocatestack.c`
+        hunk?
+      * 6e04cbbe79f5965809fdbf1f28d7ae8b4af74d31 +
+        1bfbe0d335d3fc44a492648b974a0db19975f6d8 -- `Fix
+        pathconf(_PC_BUF_SIZE).`
+      * 28377d1bf58625172a1734b92e835591d4d23a18 -- `Optimize fdopendir a bit.`
+      * 7fb90fb89bbdf273ab7ab96517fe1b156cd7aee1 +
+        6fb2dde3f1aa3a1419cb6c2dfa53dd1d506722a4 -- `Fix Linux getcwd for long
+        paths`
+      * [low] [[!taglink open_issue_libpthread]]
+        5bdcc10322c488f53557440acf71623d8b313ab5 -- return `EAGAIN` instead of
+        `ENOMEM`.
+      * f574184a0e4b6ed69a5d9a3234543fba6d2a7367 -- `Fix sched_setscheduler
+        call in spawn implementation`
+      * 3b85df27870a47ed1db84e948e37a5a50a178a92 +
+        f50ef8f1efdd1f2b040acbb8324604f168e8832a -- sysconf
+      * 68a3f91fcad464c4737c1eaed4ae0bf539801fb2 -- `Fix reporting of invalid
+        timeouts in emulated pselect`
+      * ea389b12b3b65c4a7fa91fa76f8c99867eb37865 -- `strndup -> __strndup`;
+        strndupa?
+      * 7e4afad5bcf49e03c3b987399c6a8f66a9018660 -- `Nicer output for negative
+        error numbers in strerror_r`.  Change needed for
+        `sysdeps/mach/_strerror.c`?
+      * 7ea72f99966a65a56aedba817ee2413ff9b1f23c +
+        adcd5c15d2a37794d021104160b425ff61f88219 -- `Always fill output buffer
+        in XPG strerror function`.  Change needed for
+        `sysdeps/mach/xpg-strerror.c`?
+      * a91710475294c66d0005bdaae0919d36ef8ce3d2 -- sotruss.  Does it work?
+      * b1ebd700c5295a449f8d114740f0d1fb6e6b2eb5 +
+        80e2212d8e59933a1641f029ebd360526ff0e074 +
+        4997db742946d08be4378cf91221f558f928bc73 -- `Don't document si_code
+        used for raise()`.  Also for `bits/siginfo.h`?
+      * 11988f8f9656042c3dfd9002ac85dff33173b9bd -- pldd, Does it work?
+        Probably not: needs `/proc/[PID]/auxv`, `/proc/[PID]/exe`,
+        `/proc/[PID]/mem` ([[!tag open_issue_hurd]],
+        [[hurd/translator/procfs]]).
+      * 78a7eee7fab0802addf500c481335ed6e9899bda +
+        62bede1313c3a1fa477a092006d64436de6821b1 +
+        113ddea44742d006d7a910a0707106c7defcfd9b -- `.ctors/.dtors`.  Watch
+        what happens.  `AC_TRY_LINK` vs. cross compiling/bootstrapping?  Native
+        build: `checking whether to use .ctors/.dtors header and
+        trailer... no`; results in `#define NO_CTORS_DTORS_SECTIONS 1`: OK (as
+        before).
+      * 9113ea1f3f29b3aee710efc829e85a9772bcb836 -- `--experimental-malloc`.
+        Watch what happens.
+      * 4e34ac6a1e256f40ab0d8eeed37aa1ea83440e76 -- `-defsym=_begin=0`.  Watch
+        what happens.  Native build: apparently OK.
+      * f781ef4015504e8a1da649c266584976238aa079 (`--with-default-link`) +
+        1b74661a6b93a892ecb1c717dedeedba5c2a976c +
+        fd5e21c75d8e9221d766f4bc922a237265514ec2.  Watch what happens.  Native
+        build: `use-default-link = no`.
+      * de283087c74f720cf8a7171972e72b5fa2b45e79 (`Handle Lustre filesystem`),
+        4e5f31c847982997c856f03bbc35134e9fd0f61f (`Handle ext4 in
+        {,f}pathconf`).  What about stuff like that for us?
+      * d30cf5bb00bfb286ff14d931fb69f5b53724bcdc (`Find readelf with
+        AC_CHECK_TOOL`).  Aren't there more in other configure.in and Makefile
+        files?
+      * 574920b446870648623a85e00dd8f3ca9f482c0e (`Rewrite -z relro configure
+        check`) + defe906180bad4e356bb55b60b10abd41b7ee3a1 +
+        9fa2c03227e159050e9dc4ec1e315e5909901580.  Watch what happens.  Native
+        build: OK, `yes` (as before).
+      * 5c55070081c27168d27145afdf6a92cd56c9abb3 (`linker
+        --print-output-format`).  Watch what happens.  Native build: OK,
+        `elf32-i386`.
+      * 7a03a9c8c4b37b88ac5e82b557d974f3161ddaf9 (`Add read barriers in
+        cancellation initialization`).  Is this needed in other places, too?
+
+
+# Build
+
+Here's a log of a glibc build run; this is from our [[Git repository's
+946cceff76422cedd8ca2f50bced0a672e64a9a9 (2011-09-22; 2011-08-04)
+sources|source_repositories/glibc]], run on coulomb.SCHWINGE.
+
+    $ export LC_ALL=C
+    $ ../Roger_Whittaker/configure AUTOCONF=: --without-cvs --prefix=/usr --disable-profile --disable-multi-arch --build=i486-gnu --host=i486-gnu CC=gcc-4.4 CXX=g++-4.4 2>&1 | tee log_build
+    [...]
+    $ make install_root=/INVALID 2>&1 | tee log_build_
+    [...]
+
+This takes up around 400 MiB and needs roughly 120 min on coulomb.SCHWINGE.
+
+<!--
+    $ (make install_root=/INVALID && touch .go-check) 2>&1 | tee log_build_ && test -f .go-check && make -k install_root=/INVALID check 2>&1 | tee log_check
+    $ find ./ -name \*.o -o -name \*.os -o -name \*.oS | while read f; do ~/tmp/gcc/git/contrib/compare-debug --preserve ../Roger_Whittaker.build-gcc-4.4-486.O/"$f" "$f"; done 2>&1 | less 
+    $ while read f; do (readelf -a "$f" && objdump -xDrtw "$f") > N && (cd ../Roger_Whittaker.build-gcc-4.4-486.O/ && readelf -a "$f" && objdump -xDrtw "$f") > O && diff -u O N | less; done
+    $ find ./ -name \*.o -o -name \*.os -o -name \*.oS | while read f; do readelf -h "$f" | grep OS/ABI | (read a b && [ x"$b" != x'UNIX - System V' ] && echo "### $f: $b"); done
+
+-->
+
+
+## Analysis
+
+TODO.
+
+
+# Install
+
+TODO.
+
+<!--
+    $ make install 2>&1 | tee log_install
+    [...]
+
+This takes up around 50 MiB, and needs roughly 1 min on kepler.SCHWINGE and 3
+min on coulomb.SCHWINGE.
+-->
+
+
+## Analysis
+
+TODO.
+
+<!--
+    $ diff -wu <(ssh kepler.SCHWINGE 'cd tmp/source/gdb/ && cat hurd/master.build/log_install | sed -e "s%\(/media/data\)\?${PWD}%[...]%g"' | sed -f open_issues/gdb/log_install-linux.sed) <(ssh coulomb.SCHWINGE 'cd tmp/gdb/ && cat hurd/master.build/log_install | sed "s%\(/media/erich\)\?${PWD}%[...]%g"' | sed -f open_issues/gdb/log_install-hurd.sed) > open_issues/gdb/log_install.diff
+
+[[log_install.diff]].
+
+  * `libtool: finish`: `ldconfig` is not run for the Hurd.
+
+-->
+
+
+# Testsuite
+
+    $ make -k install_root=/INVALID check 2>&1 | tee log_check
+    [...]
+
+This needs roughly 50 min on coulomb.SCHWINGE.
+
+<!--
+    $ ssh kepler.SCHWINGE 'cd tmp/source/gdb/ && sed < hurd/master.build/gdb/testsuite/gdb.sum -e "s%\(/media/data\)\?${PWD}%[...]%g"' > open_issues/gdb/sum_linux
+    $ ssh coulomb.SCHWINGE 'cd tmp/gdb/ && sed < hurd/master.build/gdb/testsuite/gdb.sum -e "s%\(/media/erich\)\?${PWD}%[...]%g"' > open_issues/gdb/sum_hurd
+
+Comparing the results files, [[sum_linux]] to [[sum_hurd]]:
+
+    $ diff -u -F ^Running open_issues/gdb/sum_linux open_issues/gdb/sum_hurd > open_issues/gdb/sum.diff
+
+[[open_issues/gdb/sum.diff]].
+-->
+
+
+## Analysis
+
+There is quite a baseline of failures.
+
+### Additional Failures Compared to Debian
+
+    $ bash ~/tmp/glibc/debian/eglibc-2.13/debian/testsuite-checking/convertlog.sh log_check  > log_check.filtered
+    $ bash ~/tmp/glibc/debian/eglibc-2.13/debian/testsuite-checking/compare.sh ~/tmp/glibc/debian/eglibc-2.13/debian/testsuite-checking/expected-results-i486-gnu-libc log_check.filtered
+
+  * `bug-atexit3.out`, `debug/tst-chk4`, `debug/tst-lfschk4`,
+    `debug/tst-lfschk5`, `debug/tst-lfschk6`, `debug/tst-chk5`,
+    `debug/tst-chk6`
+
+        dlopen failed: libstdc++.so.6: cannot open shared object file: No such file or directory
+
+  * `io/ftwtest`, `posix/globtest`, `iconvdata/iconv-test`, `intl/tst-gettext`,
+    `malloc/tst-mtrace`, `elf/tst-pathopt`, `iconvdata/tst-tables`,
+    `grp/tst_fgetgrent`, `dlfcn/tststatic`, `dlfcn/tststatic2`,
+    `posix/wordexp-tst`, `localedata/bug-setlocale1.out`
+
+        /home/thomas/tmp/glibc/tschwinge/Roger_Whittaker.build-gcc-4.4-486.O/io/ftwtest: error while loading shared libraries: libmachuser.so.1: cannot open shared object file: No such file or directory
+
+    Should be using the build-directory one anyway!
+
+  * `math/test-idouble`, `math/test-ifloat`, `math/test-ildoubl`,
+    `math/test-ldouble`
+
+    SIGSEGV.
+
+  * `rt/tst-aio10`, `rt/tst-aio9`
+
+        /home/thomas/tmp/glibc/tschwinge/Roger_Whittaker.build-gcc-4.4-486.O/rt/tst-aio10.o: In function `do_test':
+        tst-aio10.c:(.text+0x1b): undefined reference to `pthread_self'
+        tst-aio10.c:(.text+0x78): undefined reference to `pthread_barrier_init'
+        tst-aio10.c:(.text+0xf7): undefined reference to `pthread_create'
+        tst-aio10.c:(.text+0x10b): undefined reference to `pthread_barrier_wait'
+        /home/thomas/tmp/glibc/tschwinge/Roger_Whittaker.build-gcc-4.4-486.O/rt/tst-aio10.o: In function `tf':
+        tst-aio10.c:(.text+0x5ae): undefined reference to `pthread_barrier_wait'
+        tst-aio10.c:(.text+0x5ef): undefined reference to `pthread_kill'
+        collect2: ld returned 1 exit status
+        make[2]: *** [/home/thomas/tmp/glibc/tschwinge/Roger_Whittaker.build-gcc-4.4-486.O/rt/tst-aio10] Error 1
+
+  * `rt-tst-aio2`, `rt-tst-aio3`, `rt/tst-mqueue3`, `rt/tst-mqueue6`,
+    `rt/tst-mqueue8`, `elf/tst-thrlock`, `rt/tst-timer3`,
+    `nss//libnss_test1.so`
+
+    Compilation: missing `pthread_attr_init`, `pthread_barrier_init`,
+    `pthread_create`, etc.
+
+  * `elf/tst-audit1`, `elf/tst-audit2`
+
+    SIGKILL.
+
+  * `inet/tst-ether_line`
+
+        tst-ether_line.c:19: error: 'ETH_ALEN' undeclared (first use in this function)
+
+  * `posix/tst-getconf`
+
+        /bin/sh -e tst-getconf.sh /home/thomas/tmp/glibc/tschwinge/Roger_Whittaker.build-gcc-4.4-486.O/ /home/thomas/tmp/glibc/tschwinge/Roger_Whittaker.build-gcc-4.4-486.O/elf/ ld.so.1
+        make[2]: *** [/home/thomas/tmp/glibc/tschwinge/Roger_Whittaker.build-gcc-4.4-486.O/posix/tst-getconf.out] Error 127
+
+  * `time/tst-mktime2`
+
+        tst-mktime2.c:132: error: 'INT_MAX' undeclared (first use in this function)
+
+  * `io/tst-readlinkat`
+
+        /media/erich/home/thomas/tmp/glibc/tschwinge/Roger_Whittaker/io/tst-readlinkat.c:109: warning: warning: readlinkat is not implemented and will always fail
+
+  * `gmon/tst-sprofil`
+
+        Floating point exception
+
+  * `posix/tst-sysconf`
+
+        tst-sysconf.c:32: error: '_POSIX_PRIORITIZED_IO' undeclared here (not in a function)
+        tst-sysconf.c:33: error: '_POSIX_PRIORITY_SCHEDULING' undeclared here (not in a function)
+        tst-sysconf.c:43: error: '_POSIX_SPIN_LOCKS' undeclared here (not in a function)
+        tst-sysconf.c:45: error: '_POSIX_SYNCHRONIZED_IO' undeclared here (not in a function)
+
+  * `posix/bug-regex31-mem`, `posix/tst-fnmatch-mem`
+
+    *output* files: some memory not freed.
+
+  * `string/test-strnlen`
+
+        /media/erich/home/thomas/tmp/glibc/tschwinge/Roger_Whittaker/string/test-strnlen.c:87: undefined reference to `MIN'
+
+  * `stdlib/bug-getcontext.out`
+
+        getcontext failed, errno: 1073741902.
+
+    Is not implemented; see above.
+
+  * `elf/tst-unique3lib.so`, `elf/tst-unique3lib2.so`, `elf/tst-unique4lib.so`
+
+        /home/thomas/tmp/glibc/tschwinge/Roger_Whittaker.build-gcc-4.4-486/elf/tst-unique3lib.os:(.data.DW.ref.__gxx_personality_v0[DW.ref.__gxx_personality_v0]+0x0): undefined reference to `__gxx_personality_v0'
+
+  * `stdio-common/tst-rndseek.out`
+
+    Timeout.
+
+
+## OLD
+
+`configure --without-cvs --prefix= --disable-profile --build=i486-gnu
+--host=i486-gnu`
+
+`make -k check` changes from 538603af899057a9ef9583cc447804ec602a45e5 to
+c9fd33ef070def49c078c94f8d9bc9f8a8e267f7.
+
+Configured with `--prefix=/usr` instead of `--prefix=`.
+
+Resolved failures:
+
+  * localedata/tst_mblen.out
+  * localedata/tst_mbrlen.out
+  * localedata/tst_mbrtowc.out
+  * localedata/tst_mbsrtowcs.out
+  * localedata/tst_mbstowcs.out
+  * localedata/tst_mbtowc.out
+  * localedata/tst_swscanf.out
+  * localedata/tst_wcrtomb.out
+  * localedata/tst_wcsrtombs.out
+  * localedata/tst_wcstombs.out
+  * localedata/tst_wctob.out
+  * localedata/tst_wctomb.out
+  * localedata/bug-iconv-trans.out
+  * localedata/tst-wctype.out
+  * math/test-float.out
+  * math/test-double.out
+  * posix/tst-vfork3-mem
+  * io/tst-mkdirat.out
+
+New:
+
+  * A lot of `error while loading shared libraries: libmachuser.so.1: cannot
+    open shared object file: No such file or directory`.  Is it perhaps picking
+    that library up from `$prefix/lib/`?
+
+    New failures; likely due to that:
+
+      * iconvdata/iconv-test.out
+      * iconvdata/tst-tables.out
+      * malloc/tst-mtrace.out
+      * grp/tst_fgetgrent.out
+      * posix/globtest.out
+      * posix/wordexp-tst.out
+      * io/ftwtest.out
+      * elf/tst-pathopt.out
+
+    Changed failures; likely due to that:
+
+      * debug/tst-chk4.out / debug/tst-chk5.out
+
+            -error while loading shared libraries: libstdc++.so.6: cannot open shared object file: No such file or directory
+            +error while loading shared libraries: libpthread-stubs.so.0: cannot open shared object file: No such file or directory
+
+---
+
+Changes to b367d4f996512af6841c3cefdb943cb0a826a6a1: nothing interesting.
+
+---
+
+Changes to b85c54a1f7e5241c1ef99dfeaecbd1bf4117564f: nothing interesting.
+
+New failures:
+
+  * posix/bug-glob3.out (SEGFAULT; but also on Linux)
+  * wctype/bug-wctypeh.o (compile error; but also on Linux)