BUGS

   1             List of known bugs (certainly very incomplete)
   2             ----------------------------------------------
   3
   4 Time-stamp: <00/07/14 11:39:22 aj>
   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 [  *]  The precision of the `sinhl' and/or `asinhl' function do not seem
  36        to be the best.
  37
  38 [  *]  On Linux, there should be a way to prevent defining the symbol
  39        NGROUPS_MAX in the <linux/limits.h> header file.  In glibc it
  40        is defined in <posix1_lim.h> which must not make the other
  41        symbols in <linux/limits.h> available.
  42        [PR libc/140]
  43
  44 [  *]  The libm-ieee `gamma' function gives wrong results (at least for
  45        -0.5).
  46
  47 [  *]  The libm-ieee `scalb' function gives wrong results for
  48        non-integral second parameters.
  49
  50 [  *]  Collation symbol and equivalence class handling in regex are not
  51        yet 100% correct.
  52        - [. .] at end of a range does not work
  53        - [. .] and [= =] do not handle collating symbols (where a symbol
  54          stands for multiple character) and multibyte character in
  55          general not correctly.
  56
  57        This is *extremely* hard to fix since regex has to be rewritten
  58        completely.
  59
  60 [  *]  The regex implementation has various other problems, like limitations
  61        of the expression size etc. [PR libc/1570, PR libc/1777]
  62
  63        None of these can be fixed without a rewrite.
  64
  65 [  *]  Several (most?) collation specifications are broken.  The code which
  66        is currently there is in most cases inherited from the originial
  67        author (in case there is a LC_COLLATE specification in the locale
  68        file) or is defined using the default (if iso14651_t1 is included).
  69
  70        In any case we are missing information to correct the specification.
  71        If you find the specification for your language be faulty please
  72        send a report with instruction on what to fix.  You don't have to
  73        fix the specification yourself.
  74
  75        The way it finally should look like (if the generic specification
  76        is not correct) can be seen in the sv_SE file.  Quite a few changes
  77        on top of the generic specification can be made without duplication
  78        of the whole LC_COLLATE description.
  79
  80 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  81 Ulrich Drepper
  82 drepper@cygnus.com