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  4. <TITLE>uClibc -- a C library for embedded systems</TITLE>
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  13. <FONT FACE="lucida, helvetica" COLOR="#ccccc0">
  14. <B>µ&nbsp;C&nbsp;l&nbsp;i&nbsp;b&nbsp;c</B>
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  19. <p>
  20. <!-- Begin Introduction section -->
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  22. <TR><TD BGCOLOR="#ccccc0" ALIGN=center>
  23. <A NAME="intro"> <BIG><B>
  24. uClibc -- a C library for embedded systems
  25. </font>
  26. </A></B></BIG>
  27. </TD></TR>
  28. <TR><TD BGCOLOR="#eeeee0">
  29. <a href="http://www.uclibc.org">uClibc</a> (aka µClibc/pronounced
  30. yew-see-lib-see) is a C library for developing embedded Linux systems.
  31. It is much smaller than the
  32. <a href="http://www.gnu.org/software/libc/libc.html">GNU C Library</a>,
  33. but nearly all applications supported by glibc also work perfectly with
  34. uClibc. Porting applications from glibc to uClibc typically involves
  35. just recompiling the source code. uClibc even supports shared libraries
  36. and threading. It currently runs on <a href="http://kernel.org/">standard Linux</a>
  37. and <a href="http://www.uclinux.org">MMU-less (also known as µClinux)</a>
  38. systems with support for alpha, ARM, i386, i960, h8300, m68k, mips/mipsel,
  39. PowerPC, SH, SPARC, and v850 processors.
  40. <p>
  41. If you are building an embedded Linux system and you find that glibc is
  42. eating up too much space, you should consider using uClibc. If you are
  43. building a huge fileserver with 12 Terabytes of storage, than using
  44. glibc may be a better choice...
  45. <p>
  46. uClibc is maintained by
  47. <a href="http://www.codepoet.org/andersen/erik/erik.html">Erik Andersen</a>
  48. and is licensed under the
  49. <a href="http://www.gnu.org/copyleft/lgpl.html">GNU LIBRARY GENERAL PUBLIC LICENSE</a>
  50. . This license allows you to make closed source commercial applications using
  51. uClibc (Please consider sharing some of the money you make ;-). You do not need
  52. to give away all your source code just because you use uClibc and/or run on Linux.
  53. <p>
  54. <h3>Mailing List Information</h3>
  55. uClibc has a <a href="/lists/uclibc/">mailing list</a>.<br>
  56. To subscribe, go and visit
  57. <a href="http://www.uclibc.org/mailman/listinfo/uclibc">this page</a>.
  58. <p>
  59. <h3>Frequently Asked Questions</h3>
  60. You might want to take a look at the
  61. <a href="FAQ.html">list of Frequently Asked Questions</a>
  62. before asking questions on the mailing list...
  63. <h3>Working Applications List</h3>
  64. These days, pretty much everything compiles with uClibc. This
  65. is a <a href="uClibc-apps.html">list of applications</a> that are known
  66. to work just fine with uClibc. Since most applications work just
  67. fine with uClibc, we are especially interested in knowing about any
  68. applications that either <em>do not compile</em> or <em>do not work</em>
  69. properly with uClibc. Submissions are welcome!
  70. <!-- Begin Latest News section -->
  71. <TR><TD BGCOLOR="#ccccc0" ALIGN=center>
  72. <A NAME="news">
  73. <BIG><B>
  74. Latest News</A>
  75. </B></BIG>
  76. </A>
  77. </TD></TR>
  78. <TR><TD BGCOLOR="#eeeee0">
  79. <ul>
  80. <p>
  81. <li> <b>16 September 2002, gcc-3.2 and gcc-2.95 toolchains released</b>
  82. <br>
  83. CodePoet Consulting (i.e. Erik) has released updated gcc-3.2 and gcc-2.95
  84. uClibc toolchains. These toolchains build real gcc cross compilers (i.e.
  85. not just a wrapper) and create executables linked vs uClibc. The new
  86. gcc-3.2 provides uClibc support with the latest and greatest compiler
  87. available from the gcc team. The gcc-2.95 toolchain has been updated to
  88. the latest version of uClibc and now provides full C++ support, using the
  89. <a href="http://www.stlport.org/">STLport</a> standard C++ library.
  90. <p>
  91. This toolchain should make it easy for anyone to build uClibc based
  92. applications. <a href="http://www.kernel.org/pub/linux/libs/uclibc/toolchain/">
  93. Source code can be downloaded here</a>.
  94. Be aware that much of the needed source code will actually be downloaded on
  95. when you compile the toolchains. To build a toolchain, simply
  96. grab the source, edit the Makefile to select where you would like
  97. the toolchain installed, run 'make', and then go watch TV, eat
  98. dinner, or visit with your friends while it compiles. It takes
  99. about 15 minutes for Erik to compile the gcc-3.2 toolchain (w/C++ support)
  100. on his Athlon XP 1600 (not counting the time it takes to download
  101. source code).
  102. <p>
  103. <p>
  104. <li> <b>27 August 2002, uClibc 0.9.15 Released</b>
  105. <br>
  106. CodePoet Consulting is pleased to announce the immediate availability
  107. of uClibc 0.9.15. This release fixes a number of problems that turned
  108. up since the last release. The good news is that uClibc now
  109. passes all tests in the perl 5.8 and Python 2.2.1 test suites, both with
  110. and without pthreads. So without any further ado....
  111. <p>
  112. The
  113. <a href="http://www.us.kernel.org/pub/linux/libs/uclibc/Changelog">Changelog</a>
  114. and <a href="http://www.us.kernel.org/pub/linux/libs/uclibc/uClibc-0.9.15.tar.bz2">source code</a>
  115. for this release are available <a href="http://www.us.kernel.org/pub/linux/libs/uclibc/">here</a>.
  116. <p>
  117. Have fun!
  118. <p>
  119. <p>
  120. <li> <b>12 August 2002, uClibc 0.9.14 Released</b>
  121. <br>
  122. CodePoet Consulting is slightly less pleased then usual to announce the
  123. immediate availability of uClibc 0.9.14. This is, unfortunately, a bugfix
  124. release intended to fix the couple of dumb things that slipped into the
  125. previous release. Version 0.9.13 of uClibc would fail to compile when
  126. enabling both RPC and Pthreads. There was also a problem with RPC thread
  127. local storage (but noone noticed since it didn't compile ;-). Also, the
  128. thread locking in exit(), onexit() and atexit() was broken, and wasn't
  129. actually locking anything. This release also fixes uClibc's gcc wrapper
  130. to use crtbeginS.o and crtendS.o when compiling PIC code, fixing a subtle
  131. bug (that was much less subtle on powerpc). Finally, this release includes a
  132. few minor compile warning cleanups.
  133. <p>
  134. The
  135. <a href="http://www.us.kernel.org/pub/linux/libs/uclibc/Changelog">Changelog</a>
  136. and <a href="http://www.us.kernel.org/pub/linux/libs/uclibc/uClibc-0.9.14.tar.bz2">source code</a>
  137. for this release are available <a href="http://www.us.kernel.org/pub/linux/libs/uclibc/">here</a>.
  138. <p>
  139. Have fun!
  140. <p>
  141. <li> <b>12 August 2002, Native uClibc/gcc-3.1.1 toolchain released</b>
  142. <br>
  143. CodePoet Consulting (i.e. Erik) has released an updated native
  144. uClibc/gcc-3.1.1 toolchain. This toolchain builds a real gcc cross
  145. compiler (i.e. not just a wrapper) and creates executables linked vs
  146. uClibc. This toolchain has been (briefly) tested as working on x86, arm,
  147. mips, and arm7tdmi (uClinux). This toolchain provides a number of
  148. improvements over previous releases. In particular, Steven J. Hill found
  149. and fixes a number of "glibc-isms" in the libstdc++ math support which
  150. caused a number of math functions to be mapped to the non-standard named
  151. under GNU libc. This release also includes greatly improved uClinux
  152. "elf2flt" support, and it now produces working flat binaries for my
  153. uClinux/arm7tdmi system. The native uClibc/gcc-2.95 toolchain will be
  154. updated in a few days, and will include STLport which will allow that
  155. toolchain to also provide full C++ support.
  156. <p>
  157. This toolchain should make it easy for anyone to build uClibc based
  158. applications. <a href="http://www.us.kernel.org/pub/linux/libs/uclibc/toolchain/">
  159. Source code can be downloaded here</a>.
  160. Be aware that much of the needed source code will actually be downloaded on
  161. demand when you compile things. To build the toolchain, simply
  162. grab the source, edit the Makefile to select where you would like
  163. the toolchain installed, run 'make', and then go watch TV, eat
  164. dinner, or visit with your friends while it compiles. It takes
  165. about 15 minutes for Erik to compile the gcc-3.1.1 toolchain (w/C++ support)
  166. on his Athlon XP 1600 (not counting the time it takes to download
  167. source code). Your results may vary...
  168. <p>
  169. <li> <b>9 August 2002, uClibc now mirrored on kernel.org!</b>
  170. <br>
  171. uClibc is now available from the kernel.org mirrors! This should make
  172. uClibc downloads much faster. The kernel.org mirrors will have all
  173. uClibc release versions (everything but the daily snapshots).
  174. Here is a list of all the <a href="http://kernel.org/mirrors/">kernel.org mirror sites</a>.
  175. Just pick the closest mirror site, and then go to "/pub/linux/libs/uclibc/"
  176. to download uClibc. For example, is you live the USA, you can go to
  177. <a href="http://www.us.kernel.org/pub/linux/libs/uclibc/">
  178. http://www.us.kernel.org/pub/linux/libs/uclibc/</a> to download the latest
  179. uClibc release from a nice fast system.
  180. <p>
  181. <p>
  182. <p> <li> <b>Old News</b>
  183. <br>
  184. <a href="old-news.html">Click here to read older news</a>.
  185. <p>
  186. </ul>
  187. <!-- Begin Sponsors section -->
  188. <TR><TD BGCOLOR="#ccccc0" ALIGN=center>
  189. <A NAME="sponsors"><BIG><B>
  190. Sponsors
  191. </A></B></BIG>
  192. </TD></TR>
  193. <tr><td bgcolor="#EEEEE0">
  194. Please visit our sponsors and thank them for their support! They have
  195. provided money, equipment, bandwidth, etc. Next time you need help with a
  196. project, consider these fine companies! Several individuals have also
  197. contributed (If you have contributed and would like your name added here,
  198. just email Erik and let him know).
  199. <ul>
  200. <li><a href="http://opensource.se/">opensource.se</a><br>
  201. Embedded open source consulting in Europe.</li>
  202. <li><a href="http://i-netinnovations.com/">http://i-netinnovations.com/</a><br>
  203. Web hosting (currently hosting busybox.net and uclibc.org)</li>
  204. <li><a href="http://www.lineo.com">Lineo</a><br>
  205. Embedded Linux development and services.</li>
  206. <li><a href="http://www.codepoet-consulting.com">Codepoet Consulting</a><br>
  207. Custom Linux, embedded Linux, BusyBox, and uClibc development.</li>
  208. </ul>
  209. <table CELLSPACING=6 CELLPADDING=6 BORDER=0><tr>
  210. <td>
  211. Do you like uClibc? Do you need support? Do you need some feature
  212. added? Then why not help out? We are happy to accept donations
  213. (such as bandwidth, mirrors sites, and hardware for the various
  214. architectures). We can also provide support contracts, and implement
  215. funded feature requests. To contribute, you can either click on the
  216. Donate image to donate using PayPal, or you can contact Erik at
  217. <a href="http://codepoet-consulting.com/">CodePoet Consulting</a>
  218. (we have a credit card machine so you can avoid PayPal if you wish).
  219. </td>
  220. <td>
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  223. <input type="hidden" name="cmd" value="_xclick">
  224. <input type="hidden" name="business" value="andersen@codepoet.org">
  225. <input type="hidden" name="item_name" value="Support uClibc">
  226. <input type="hidden" name="image_url" value="https://codepoet-consulting.com/images/codepoet.png">
  227. <input type="hidden" name="no_shipping" value="1">
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  233. </table>
  234. <!-- Begin Download section -->
  235. <TR><TD BGCOLOR="#ccccc0" ALIGN=center>
  236. <A NAME="download"><BIG><B>
  237. Download
  238. </A></B></BIG>
  239. </TD></TR>
  240. <TR><TD BGCOLOR="#eeeee0">
  241. <ul>
  242. <li> Source for the latest release can always be downloaded from
  243. <a href="downloads/">http://www.uclibc.org/downloads</a>
  244. <li> A new snapshot of the source is made daily and is available
  245. <a href="downloads/snapshots/">here</a>
  246. <li> uClibc has its own publically browsable <a href="/cgi-bin/cvsweb/uClibc/">CVS tree</a>
  247. with <a href="cvs_anon.html">anonymous CVS access</a>, and for those that are actively
  248. contributing there is even <a href="cvs_write.html">CVS write access</a>.
  249. </ul>
  250. <!-- Begin Links section -->
  251. <TR><TD BGCOLOR="#ccccc0" ALIGN=center>
  252. <A NAME="links">
  253. <BIG><B>
  254. Other Open Source C libraries:
  255. </A>
  256. </B></BIG>
  257. </A>
  258. </TD></TR>
  259. <TR><TD BGCOLOR="#eeeee0">
  260. <ul>
  261. <li><a href="http://www.gnu.org/software/libc/libc.html">GNU C Library (aka glibc)</a>
  262. <li> <a href="http://www.k9wk.com/cdoc.html">Al's FREE C Runtime Library</a>
  263. <li><a href="http://www.fefe.de/dietlibc/">diet libc </a>
  264. <li>the <a href="http://www.cs.vu.nl/~ast/minix.html">minix</a>
  265. <a href="http://www.cs.vu.nl/cgi-bin/raw/pub/minix/2.0.0/src.tar"
  266. >C library</a>
  267. <li> <a href="http://sources.redhat.com/newlib/">newlib</a>
  268. <li>and there is a
  269. <a href="ftp://sourceware.cygnus.com/pub/ecos/">C library</a>, for
  270. <a href="http://sources.redhat.com/ecos/">eCos</a> as well.
  271. <ul>
  272. <!-- Begin Links section -->
  273. <TR><TD BGCOLOR="#ccccc0" ALIGN=center>
  274. <A NAME="links">
  275. <BIG><B>
  276. Links to other useful stuff
  277. </A>
  278. </B></BIG>
  279. </A>
  280. </TD></TR>
  281. <TR><TD BGCOLOR="#eeeee0">
  282. <ul>
  283. <li> <a href="http://www.uclibc.org/">The uClibc home page</a>
  284. <p>
  285. <li> <a href="http://busybox.net/">BusyBox</a>
  286. <p>
  287. <li> <a href="http://udhcp.busybox.net/">udhcp</a>
  288. <p>
  289. <li> <a href="http://www.uclinux.org/">The uClinux home page</a>
  290. <p>
  291. <li> <a href="http://cvs.uclinux.org/">The uClinux CVS repository</a>
  292. <p>
  293. <li> <a href="http://codepoet-consulting.com/">CodePoet Consulting</a>
  294. <p>
  295. </ul>
  296. <!-- End of Table -->
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