1 Open jobs for finishing GNU libc:
2 ---------------------------------
5 If you have time and talent to take over any of the jobs below please
6 contact <bug-glibc@gnu.org>.
8 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 [ 1] Port to new platforms or test current version on formerly supported
13 **** See http://www.gnu.org/software/libc/porting.html for more details.
16 [ 2] Test compliance with standards. If you have access to recent
17 standards (IEEE, ISO, ANSI, X/Open, ...) and/or test suites you
18 could do some checks as the goal is to be compliant with all
19 standards if they do not contradict each other.
22 [ 3] The IMHO opinion most important task is to write a more complete
23 test suite. We cannot get too many people working on this. It is
24 not difficult to write a test, find a definition of the function
25 which I normally can provide, if necessary, and start writing tests
26 to test for compliance. Beside this, take a look at the sources
27 and write tests which in total test as many paths of execution as
31 [ 4] Write translations for the GNU libc message for the so far
32 unsupported languages. GNU libc is fully internationalized and
33 users can immediately benefit from this.
35 Take a look at the matrix in
36 ftp://ftp.gnu.org/pub/gnu/ABOUT-NLS
37 for the current status (of course better use a mirror of ftp.gnu.org).
40 [ 6] Write `long double' versions of the math functions. This should be
41 done in collaboration with the NetBSD and FreeBSD people.
43 The libm is in fact fdlibm (not the same as in Linux libc).
45 **** Partly done. But we need someone with numerical experiences for
49 [ 7] Several math functions have to be written:
53 with long double arguments.
55 Beside this most of the complex math functions which are new in
56 ISO C 9X should be improved. Writing some of them in assembler is
57 useful to exploit the parallelism which often is available.
60 [ 8] If you enjoy assembler programming (as I do --drepper :-) you might
61 be interested in writing optimized versions for some functions.
62 Especially the string handling functions can be optimized a lot.
66 Faster String Functions
67 Henry Spencer, University of Toronto
68 Usenix Winter '92, pp. 419--428
70 or just ask. Currently mostly i?86 and Alpha optimized versions
71 exist. Please ask before working on this to avoid duplicate
75 [10] Extend regex and/or rx to work with wide characters and complete
76 implementation of character class and collation class handling.
78 It is planned to do a complete rewrite.
81 [11] Write access function for netmasks, bootparams, and automount
82 databases for nss_files and nss_db module.
83 The functions should be embedded in the nss scheme. This is not
84 hard and not all services must be supported at once.
87 [14] We need to write a library for on-the-fly transformation of streams
88 of text. In fact, this would be a recode-library (you know, GNU recode).
89 This is needed in several places in the GNU libc and I already have
90 rather concrete plans but so far no possibility to start this.
92 *** The library is available, now it remains to be used in the streams.
95 [15] Cleaning up the header files. Ideally, each header style should
96 follow the "good examples". Each variable and function should have
97 a short description of the function and its parameters. The prototypes
98 should always contain variable names which can help to identify their
101 int foo __P ((int, int, int, int));
105 [16] The libio stream file functions should be extended in a way to use
106 mmap to map the file and use it as the buffer to user sees. For
107 read-only streams this should be rather easy and it avoids all read()
110 A more sophisticated solution would use mmap also for writing. The
111 standards do not demand that the file on the disk is always in the
112 correct form so it would be possible to enlarge it always according
113 to the page size and install the correct length only for fclose() and
116 [18] Based on the sprof program we need tools to analyze the output. The
117 result should be a link map which specifies in which order the .o
118 files are placed in the shared object. This should help to improve
119 code locality and result in a smaller foorprint (in code and data
120 memory) since less pages are only used in small parts.
122 [19] A user-level STREAMS implementation should be available if the
123 kernel does not provide the support.
125 [20] More conversion modules for iconv(3). Existing modules should be
126 extended to do things like transliteration if this is wanted.
127 For often used conversion a direct conversion function should be
130 [21] The nscd program and the stubs in the libc should be changed so
131 that each program uses only one socket connect. Take a look at
132 http://www.cygnus.com/~drepper/nscd.html
134 [22] It should be possible to have the information gconv-modules in
135 a simple database which is faster to access. Using libdb is probably
136 overkill and loading it would probably be slower than reading the
137 plain text file. But a file format with a simple hash table and
138 some data it points to should be fine. Probably it should be
139 two tables, one for the aliases, one for the mappings. The code
140 should start similar to this:
142 if (stat ("gconv-modules", &stp) == 0
143 && stat ("gconv-modules.db", %std) == 0
144 && stp.st_mtime < std.st_mtime)
146 ... use the database ...
150 ... use the plain file if it exists, otherwise the db ...
153 [23] The `strptime' function needs to be completed. This includes among
154 other things that it must get teached about timezones. The solution
155 envisioned is to extract the timezones from the ADO timezone
156 specifications. Special care must be given names which are used
157 multiple times. Here the precedence should (probably) be according
158 to the geograhical distance. E.g., the timezone EST should be
159 treated as the `Eastern Australia Time' instead of the US `Eastern
160 Standard Time' if the current TZ variable is set to, say,
161 Australia/Canberra or if the current locale is en_AU.