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uClibc -- a C library for embedded systems
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uClibc (aka µClibc/pronounced
yew-see-lib-see) is a C library for developing embedded Linux systems.
It is much smaller than the
GNU C Library,
but nearly all applications supported by glibc also work perfectly with
uClibc. Porting applications from glibc to uClibc typically involves
just recompiling the source code. uClibc even supports shared libraries
and threading. It currently runs on standard Linux
and MMU-less (also known as µClinux)
systems with support for alpha, ARM, i386, i960, h8300, m68k, mips/mipsel,
PowerPC, SH, SPARC, and v850 processors.
If you are building an embedded Linux system and you find that glibc is
eating up too much space, you should consider using uClibc. If you are
building a huge fileserver with 12 Terabytes of storage, than using
glibc may be a better choice...
uClibc is maintained by
Erik Andersen
and is licensed under the
GNU LIBRARY GENERAL PUBLIC LICENSE
. This license allows you to make closed source commercial applications using
uClibc (Please consider sharing some of the money you make ;-). You do not need
to give away all your source code just because you use uClibc and/or run on Linux.
Mailing List Information
uClibc has a mailing list.
To subscribe, go and visit
this page.
Frequently Asked Questions
You might want to take a look at the
list of Frequently Asked Questions
before asking questions on the mailing list...
Working Applications List
These days, pretty much everything compiles with uClibc. This
is a list of applications that are known
to work just fine with uClibc. Since most applications work just
fine with uClibc, we are especially interested in knowing about any
applications that either do not compile or do not work
properly with uClibc. Submissions are welcome!
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Latest News
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- 27 August 2002, uClibc 0.9.15 Released
CodePoet Consulting is pleased to announce the immediate availability
of uClibc 0.9.15. This is release fixes a number of problems that have
turned up since the last release. The good news is that uClibc now
passes all tests in the perl 5.8 and Python 2.2.1 test suites, both with
and without pthreads. So without any further ado....
The
Changelog
and source code
for this release are available here.
Have fun!
- 12 August 2002, uClibc 0.9.14 Released
CodePoet Consulting is slightly less pleased then usual to announce the
immediate availability of uClibc 0.9.14. This is, unfortunately, a bugfix
release intended to fix the couple of dumb things that slipped into the
previous release. Version 0.9.13 of uClibc would fail to compile when
enabling both RPC and Pthreads. There was also a problem with RPC thread
local storage (but noone noticed since it didn't compile ;-). Also, the
thread locking in exit(), onexit() and atexit() was broken, and wasn't
actually locking anything. This release also fixes uClibc's gcc wrapper
to use crtbeginS.o and crtendS.o when compiling PIC code, fixing a subtle
bug (that was much less subtle on powerpc). Finally, this release includes a
few minor compile warning cleanups.
The
Changelog
and source code
for this release are available here.
Have fun!
- 12 August 2002, Native uClibc/gcc-3.1.1 toolchain released
CodePoet Consulting (i.e. Erik) has released an updated native
uClibc/gcc-3.1.1 toolchain. This toolchain builds a real gcc cross
compiler (i.e. not just a wrapper) and creates executables linked vs
uClibc. This toolchain has been (briefly) tested as working on x86, arm,
mips, and arm7tdmi (uClinux). This toolchain provides a number of
improvements over previous releases. In particular, Steven J. Hill found
and fixes a number of "glibc-isms" in the libstdc++ math support which
caused a number of math functions to be mapped to the non-standard named
under GNU libc. This release also includes greatly improved uClinux
"elf2flt" support, and it now produces working flat binaries for my
uClinux/arm7tdmi system. The native uClibc/gcc-2.95 toolchain will be
updated in a few days, and will include STLport which will allow that
toolchain to also provide full C++ support.
This toolchain should make it easy for anyone to build uClibc based
applications.
Source code can be downloaded here.
Be aware that much of the needed source code will actually be downloaded on
demand when you compile things. To build the toolchain, simply
grab the source, edit the Makefile to select where you would like
the toolchain installed, run 'make', and then go watch TV, eat
dinner, or visit with your friends while it compiles. It takes
about 15 minutes for Erik to compile the gcc-3.1.1 toolchain (w/C++ support)
on his Athlon XP 1600 (not counting the time it takes to download
source code). Your results may vary...
- 9 August 2002, uClibc now mirrored on kernel.org!
uClibc is now available from the kernel.org mirrors! This should make
uClibc downloads much faster. The kernel.org mirrors will have all
uClibc release versions (everything but the daily snapshots).
Here is a list of all the kernel.org mirror sites.
Just pick the closest mirror site, and then go to "/pub/linux/libs/uclibc/"
to download uClibc. For example, is you live the USA, you can go to
http://www.us.kernel.org/pub/linux/libs/uclibc/ to download the latest
uClibc release from a nice fast system.
- Old News
Click here to read older news.
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Sponsors
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Please visit our sponsors and thank them for their support! They have
provided money, equipment, bandwidth, etc. Next time you need help with a
project, consider these fine companies! Several individuals have also
contributed (If you have contributed and would like your name added here,
just email Erik and let him know).
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Do you like uClibc? Do you need support? Do you need some feature
added? Then why not help out? We are happy to accept donations
(such as bandwidth, mirrors sites, and hardware for the various
architectures). We can also provide support contracts, and implement
funded feature requests. To contribute, you can either click on the
Donate image to donate using PayPal, or you can contact Erik at
CodePoet Consulting
(we have a credit card machine so you can avoid PayPal if you wish).
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Download
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Other Open Source C libraries:
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