path: root/open_issues/glibc.mdwn

[[!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 5a31b2836d55bcc0c5b6f90f1e89245118e7f508
(2011-06-07) 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.

  * [[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`, `RLIMIT_RTTIME`, `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.?

  * 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.

  * 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`?
      * 01f16ab0a581838d44ad79e82c0c3e1691d8506e -- `Prevent loader from
        loading itself`


# Build

Here's a log of a glibc build run; this is from our [[Git repository's
d1517b24ef07438a09baf9fd512cc9defabbba2d (2011-09-17; 2011-01-19)
sources|source_repositories/glibc]], run on coulomb.SCHWINGE.

    $ export LC_ALL=C
    $ ../Roger_Whittaker/configure --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 2>&1 | tee log_build_
    [...]

This takes up around 400 MiB and needs roughly 120 min on coulomb.SCHWINGE.

<!--
    $ (make && touch .go-check) 2>&1 | tee log_build_ && test -f .go-check && make -k 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 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`

        /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'

  * `assert/test-assert.out`

    Out of ten manual invocations, got one successful.

  * `elf/tst-unique1.out`

        cannot load tst-unique1mod1

    Perhaps `elf/tst-unique2` issue with a different error message.

  * `elf/tst-unique2.out`

        /home/thomas/tmp/glibc/tschwinge/Roger_Whittaker.build-gcc-4.4-486/elf/tst-unique2: error while loading shared libraries: /home/thomas/tmp/glibc/tschwinge/Roger_Whittaker.build-gcc-4.4-486/elf/tst-unique2mod1.so: ELF file OS ABI invalid

    Needs [[toolchain/ELFOSABI_GNU]] patch.


## 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)

Other things noticed:

  * Running `make -k check` for the second time:

        -i486-gnu-gcc tst-timer2.c -c -std=gnu99 -fgnu89-inline -O2 -Wall -Winline -Wwrite-strings -fmerge-all-constants -g -Wno-parentheses -Wstrict-prototypes -mpreferred-stack-boundary=2     -I../include -I/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/rt -I/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build -I../sysdeps/i386/elf -I../sysdeps/mach/hurd/i386 -I../sysdeps/mach/hurd -I../sysdeps/gnu -I../sysdeps/unix/bsd/bsd4.4 -I../sysdeps/unix/mman -I../sysdeps/mach/i386 -I../sysdeps/mach -I../sysdeps/i386/i486 -I../sysdeps/i386/fpu -I../sysdeps/i386 -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/ldbl-96 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754/flt-32 -I../sysdeps/unix/bsd -I../sysdeps/unix/common -I../sysdeps/unix/inet -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/ieee754 -I../sysdeps/generic/elf -I../sysdeps/generic -I../hurd -I/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/hurd/ -I../mach -I/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/mach/ -I.. -I../libio -I.  -D_LIBC_REENTRANT -include ../include/libc-symbols.h   -DNOT_IN_libc=1    -o /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/rt/tst-timer2.o -MD -MP -MF /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/rt/tst-timer2.o.dt -MT /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/rt/tst-timer2.o
        -tst-timer2.c: In function ‘do_test’:
        -tst-timer2.c:33: error: ‘SIGRTMIN’ undeclared (first use in this function)
        -tst-timer2.c:33: error: (Each undeclared identifier is reported only once
        -tst-timer2.c:33: error: for each function it appears in.)
        -make[2]: *** [/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/rt/tst-timer2.o] Error 1
        +/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

        -i486-gnu-gcc tst-thrlock.c -c -std=gnu99 -fgnu89-inline -O2 -Wall -Winline -Wwrite-strings -fmerge-all-constants -g -Wno-parentheses -Wstrict-prototypes -mpreferred-stack-boundary=2     -I../include -I/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/elf -I/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build -I../sysdeps/i386/elf -I../sysdeps/mach/hurd/i386 -I../sysdeps/mach/hurd -I../sysdeps/gnu -I../sysdeps/unix/bsd/bsd4.4 -I../sysdeps/unix/mman -I../sysdeps/mach/i386 -I../sysdeps/mach -I../sysdeps/i386/i486 -I../sysdeps/i386/fpu -I../sysdeps/i386 -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/ldbl-96 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754/flt-32 -I../sysdeps/unix/bsd -I../sysdeps/unix/common -I../sysdeps/unix/inet -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/ieee754 -I../sysdeps/generic/elf -I../sysdeps/generic -I../hurd -I/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/hurd/ -I../mach -I/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/mach/ -I.. -I../libio -I.  -D_LIBC_REENTRANT -include ../include/libc-symbols.h   -DNOT_IN_libc=1    -o /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/elf/tst-thrlock.o -MD -MP -MF /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/elf/tst-thrlock.o.dt -MT /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/elf/tst-thrlock.o
        -i486-gnu-gcc -nostdlib -nostartfiles -o /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/elf/tst-thrlock  -Wl,-dynamic-linker=/usr/lib/ld.so.1   -Wl,-z,combreloc -Wl,-z,relro -Wl,--hash-style=both /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/csu/crt1.o /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/csu/crti.o `i486-gnu-gcc  --print-file-name=crtbegin.o` /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/elf/tst-thrlock.o /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/dlfcn/libdl.so.2  -Wl,-rpath-link=/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build:/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/math:/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/elf:/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/dlfcn:/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/nss:/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/nis:/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/rt:/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/resolv:/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/crypt:/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/mach:/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/hurd /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/libc.so.0.3 /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/libc_nonshared.a -lgcc -Wl,--as-needed -lgcc_s  -Wl,--no-as-needed `i486-gnu-gcc  --print-file-name=crtend.o` /home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/csu/crtn.o
        -/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/elf/tst-thrlock.o: In function `do_test':
        -/media/data/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker/elf/tst-thrlock.c:38: undefined reference to `pthread_create'
        -/media/data/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker/elf/tst-thrlock.c:48: undefined reference to `pthread_join'
        -collect2: ld returned 1 exit status
        -make[2]: *** [/home/tschwinge/tmp/glibc/tschwinge--Roger_Whittaker.build/elf/tst-thrlock] Error 1
        +/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