BUGS

   1             List of known bugs (certainly very incomplete)
   2             ----------------------------------------------
   3
   4 Time-stamp: <02/09/30 13:49:48 drepper>
   5
   6 This following list contains those bugs which I'm aware of.  Please
   7 make sure that bugs you report are not listed here.  If you can fix one
   8 of these bugs/limitations I'll certainly be glad to receive a patch.
   9
  10 Another source of information about bugs is the problem data base of the
  11 GNU project.  There is an easy to use WWW interface available at
  12
  13        http://www-gnats.gnu.org:8080/cgi-bin/wwwgnats.pl
  14
  15 I would appreciate it very much if you could verify the problem was not
  16 reported before by looking through the database.  To make the information
  17 in this database as useful as possible please report bugs always using the
  18 `glibcbug' shell script which gets installed with GNU libc.  Before reporting
  19 a bug please check the FAQ since it discusses also a lot of problematic
  20 situations.
  21
  22
  23 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  24
  25 Severity: [  *] to [***]
  26
  27 [ **]  Closing shared objects in statically linked binaries most of the
  28        times leads to crashes during the dlopen().  Hard to fix.
  29
  30 [ **]  There are problems with signal handling when using LinuxThreads.
  31
  32 [ **]  The RPC code is not 64 bit clean.  This is getting slowly fixed
  33        but expect incompatible changes on 64 bit platforms like Alpha.
  34
  35 [ **]  If a DSO is using implicitly libpthread and the application itself
  36        does not there is a name lookup problem.  E.g., the function fork()
  37        will be found in the libc.so instead of libpthread since the thread
  38        library is behind the libc.  To correct this problem it must *not*
  39        be relied on the currently still enabled handling of weak symbols
  40        in the dynamic linker.  Instead explicit tests for the availability
  41        of the libpthread version are needed.  [PR libc/2325]
  42
  43 [  *]  The precision of the `sinhl' and/or `asinhl' function do not seem
  44        to be the best.
  45
  46 [  *]  On Linux, there should be a way to prevent defining the symbol
  47        NGROUPS_MAX in the <linux/limits.h> header file.  In glibc it
  48        is defined in <posix1_lim.h> which must not make the other
  49        symbols in <linux/limits.h> available.
  50        [PR libc/140]
  51
  52 [  *]  The libm-ieee `gamma' function gives wrong results (at least for
  53        -0.5).
  54
  55 [  *]  The libm-ieee `scalb' function gives wrong results for
  56        non-integral second parameters.
  57
  58 [  *]  Several (most?) collation specifications are broken.  The code which
  59        is currently there is in most cases inherited from the originial
  60        author (in case there is a LC_COLLATE specification in the locale
  61        file) or is defined using the default (if iso14651_t1 is included).
  62
  63        In any case we are missing information to correct the specification.
  64        If you find the specification for your language be faulty please
  65        send a report with instruction on what to fix.  You don't have to
  66        fix the specification yourself.
  67
  68        The way it finally should look like (if the generic specification
  69        is not correct) can be seen in the sv_SE file.  Quite a few changes
  70        on top of the generic specification can be made without duplication
  71        of the whole LC_COLLATE description.
  72
  73 [  *]  Some of the functions which also handled IPv6 are currently broken.
  74        IPv6 and IPv4 lookups occasionally happen when not needed.  This
  75        happens in getaddrinfo() and getnameinfo().  IPv4 handling of
  76        these functions is OK though and there are patches available to fix
  77        the IPv6 code as well.
  78
  79 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  80 Ulrich Drepper
  81 drepper@redhat.com