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-[[!meta copyright="Copyright © 2012, 2013 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]]."]]"""]]
-
-[[!meta title="libpthread as glibc addon"]]
-
-[[!tag open_issue_glibc open_issue_libpthread]]
-
-This page lists all the notes, issues, etc, only about compiling libpthread
-as addon for glibc, *not* for general libpthread issues.
-
-# Building
-
-To build libpthread as glibc addon, copy libpthread inside the glibc tree,
-and then tell glibc's configure to use it:
-
-    $ cp /path/to/libpthread libpthread
-    $ ./configure [...] --enable-add-ons=[...],libpthread
-
-Currently, it is build like that in Debian since eglibc 2.13-31.
-
-# Issues and notes
-
-### `bits/` headers not used
-
-Recompiling glibc (e.g. on a Debian system) and running the
-`check-local-headers` test, `check-local-headers.out` shows:
-
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/pthread.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/thread-attr.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/mutex-attr.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/mutex.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/condition-attr.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/condition.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/rwlock-attr.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/rwlock.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/barrier-attr.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/barrier.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/thread-specific.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/once.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/cancelation.h
-    *** $(common-objpfx)elf/tst-thrlock.o: uses /usr/include/i386-gnu/bits/pthread-np.h
-
-This happens because these headers are in the `bits/` subdirectory in
-`sysdeps/generic` -- a `generic` sysdep is used only for the top-level
-`sysdeps` directory in glibc.
-
-### Use of hurd's libihash
-
-libpthread makes use of the ihash hurd library, as also glibc's
-`check-local-headers` test shows:
-
-    *** $(common-objpfx)libpthread/pt-alloc.o: uses /usr/include/hurd/ihash.h
-
-Possible alternatives: [[hurd/libihash]].
-
-### Executable stack
-
-Running glibc's `check-execstack` test gives in `check-execstack.out`:
-
-    $BUILDDIR/libpthread/libpthread.so.phdr: *** executable stack signaled
-
-### Extra PLT references
-
-Running glibc's `check-localplt` test gives in `check-localplt.out`:
-
-    Extra PLT reference: libpthread.so: pthread_detach
-    Extra PLT reference: libpthread.so: pthread_mutex_lock
-    Extra PLT reference: libpthread.so: pthread_mutexattr_settype
-    Extra PLT reference: libpthread.so: pthread_rwlock_rdlock
-    Extra PLT reference: libpthread.so: _pthread_spin_lock
-    Extra PLT reference: libpthread.so: pthread_attr_setstacksize
-    Extra PLT reference: libpthread.so: pthread_attr_getstacksize
-    Extra PLT reference: libpthread.so: pthread_attr_getstackaddr
-    Extra PLT reference: libpthread.so: pthread_attr_setstackaddr
-    Extra PLT reference: libpthread.so: pthread_exit
-    Extra PLT reference: libpthread.so: pthread_getspecific
-    Extra PLT reference: libpthread.so: __mutex_lock_solid
-    Extra PLT reference: libpthread.so: pthread_mutex_unlock
-    Extra PLT reference: libpthread.so: pthread_setcanceltype
-    Extra PLT reference: libpthread.so: pthread_key_create
-    Extra PLT reference: libpthread.so: pthread_cond_wait
-    Extra PLT reference: libpthread.so: pthread_rwlock_wrlock
-    Extra PLT reference: libpthread.so: pthread_once
-    Extra PLT reference: libpthread.so: pthread_cond_broadcast
-    Extra PLT reference: libpthread.so: pthread_setspecific
-    Extra PLT reference: libpthread.so: __pthread_get_cleanup_stack
-    Extra PLT reference: libpthread.so: pthread_rwlock_unlock
-    Extra PLT reference: libpthread.so: pthread_create
-    Extra PLT reference: libpthread.so: pthread_mutex_init
-    Extra PLT reference: libpthread.so: pthread_mutexattr_init
-    Extra PLT reference: libpthread.so: __mutex_unlock_solid
-    Extra PLT reference: libpthread.so: pthread_mutexattr_destroy
-    Extra PLT reference: libpthread.so: pthread_setcancelstate
-
-### `bits/posix_opt.h`
-
-`bits/posix_opt.h` is the glibc header defining the various
-supported/unsupported `_POSIX_*` defines (e.g. `_POSIX_THREADS`, etc).
-
-Currently, glibc's `sysdeps/mach/hurd/bits/posix_opt.h` is patched in Debian
-to add all the defines advertizing thread-related support.
-An idea to avoid this would be to follow what is done in NPTL, and do the
-following:
-
-   - in glibc: leave `sysdeps/mach/hurd/bits/posix_opt.h` with *no*
-thread-related macros at all.
-
-   - in libpthread: provide `sysdeps/mach/hurd/bits/posix_opt.h` which would
-be a copy of glibc's `sysdeps/mach/hurd/bits/posix_opt.h` with also the thread
-macros.
-
-This approach would have the drawback that changes in the glibc header must be
-mirrored also in the libpthread version, but with the advantage that defines
-according to supported features in libpthread can be added in libpthread's own
-version (and glibc would pick it automatically).
-
-### Tests
-
-The (few) existing tests are not built (thus neither run) just like other tests
-in glibc.
-
-### `gai_misc.h`
-
-A pthread version of `gai_misc.h` must be provided by libpthread (just like
-NPTL provides one), either in `sysdeps/mach/hurd` or `sysdeps/pthread`
-(better).
-
-Currently, it is provided in glibc itself in Debian.