Embedded C library http://uclibc-ng.org

Peter S. Mazinger e077860853 Only because of multi sources I had to touch up these and add code duplication 19 years ago
debian f674b612fb HAVE_SHARED depends on \!ARCH_HAS_NO_LDSO, remove BUILD_UCLIBC_LDSO and replace the dependencies w/ HAVE_SHARED 19 years ago
docs 26661de606 use & instead of &, tweak style, and add link for Embedded Gentoo 19 years ago
extra a7d83d0dc7 Add another Makefile example that will be copied over the root Makefile, adapt script 19 years ago
include 237277e9a8 Moved guard_setup to dl-osinfo.h (used commonly by ldso and libc). Renamed to _dl_setup_stack_chk_guard, as in glibc. SSP requires now binutils-2.16.1 and newer. Add NOT_IN_libc/IS_IN_libc. Began using -DSHARED in uClibc_main.c, there are more candidates in there. Move back dl_protect_relro to it's earlier place. 19 years ago
ldso a37cc0c3d4 Add check, so we are sure that the file is correctly built, if the system is ssp enabled 19 years ago
libc e077860853 Only because of multi sources I had to touch up these and add code duplication 19 years ago
libcrypt e6aa37afc9 Replace all Makefiles for new build infrastucture 19 years ago
libintl 8b9c2bd046 Split up the .o and .os rules, so all the sources are created if DOPIC is disabled. 19 years ago
libm 8b9c2bd046 Split up the .o and .os rules, so all the sources are created if DOPIC is disabled. 19 years ago
libnsl e6aa37afc9 Replace all Makefiles for new build infrastucture 19 years ago
libpthread e6aa37afc9 Replace all Makefiles for new build infrastucture 19 years ago
libresolv e6aa37afc9 Replace all Makefiles for new build infrastucture 19 years ago
librt e6aa37afc9 Replace all Makefiles for new build infrastucture 19 years ago
libutil e6aa37afc9 Replace all Makefiles for new build infrastucture 19 years ago
test f674b612fb HAVE_SHARED depends on \!ARCH_HAS_NO_LDSO, remove BUILD_UCLIBC_LDSO and replace the dependencies w/ HAVE_SHARED 19 years ago
utils 3a7ac9c7a7 Rewrote almost all Makefiles: do not use strip $(x),y; run strip on all objects at once; use :=//$</$^; use CRT_SRC/CRT_OBJ/SCRT_OBJ/CSRC/COBJ/SSRC/SOBJ/MSRC/MOBJ where no more is needed, if only CSRC is present use OBJS directly instead of COBJ; CTOR_TARGETS are created directly in lib; remove unused/unneeded parts. Hope I haven't broken too much. 19 years ago
COPYING.LIB 751dd180c3 Update license file to Lesser GPL v2.1 19 years ago
Changelog 9acf46c0c7 Update docs for release 20 years ago
Changelog.full 9acf46c0c7 Update docs for release 20 years ago
DEDICATION.mjn3 38583d5986 Today's Toni's birthday. Seems an appropriate day to add this. 21 years ago
INSTALL 37c4e78b3f fix a few typos and clean up the spacing (no tabs) 20 years ago
MAINTAINERS 6e6fe788e8 Fix platform URLs, though I'm sure rmk has enjoyed the extra traffic.. 19 years ago
Makefile a7d83d0dc7 Add another Makefile example that will be copied over the root Makefile, adapt script 19 years ago
Makefile.in a7d83d0dc7 Add another Makefile example that will be copied over the root Makefile, adapt script 19 years ago
Makerules 8b9c2bd046 Split up the .o and .os rules, so all the sources are created if DOPIC is disabled. 19 years ago
README ece14c1a67 Remove whitespace 20 years ago
Rules.mak 8585cd4da4 ASFLAGS does not need to include CFLAGS as well, compile.S does it already 19 years ago
TODO 1fbbaa0392 note the architectures which still need to be updated 19 years ago

README


uClibc - a Small C Library for Linux
Erik Andersen

uClibc (aka Clibc/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 Clinux)
systems with support for alpha, ARM, cris, e1, h8300, i386, i960,
m68k, microblaze, 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, then using glibc may make more sense. Unless, for
example, that 12 Terabytes will be Network Attached Storage and
you plan to burn Linux into the system's firmware...

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 an unmodified
version of 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. You should, however,
carefuly review the license and make certain you understand and
abide by it strictly.


For installation instructions, see the file INSTALL.

uClibc strives to be standards compliant, which means that most
documentation written for SuSv3, or for glibc also applies to
uClibc functions. However, many GNU extensions are not supported
because they have not been ported, or more importantly, would
increase the size of uClibc disproportional to the added
functionality. There is some discussion of these differences
in the "docs" directory.

Additional information (recent releases, FAQ, mailing list, bugs,
etc.) can be found at http://www.uclibc.org/.

uClibc may be freely modified and distributed under the terms of
the GNU Library General Public License, which can be found in the
file COPYING.LIB.

Please Note:

There is an unwholesomely huge amount of code out there
that depends on the presence of GNU libc header files.
We have GNU libc compatible header files. So we have
committed a horrible sin in uClibc. We _lie_ and claim
to be GNU libc in order to force these applications to
work as their developers intended. This is IMHO,
pardonable, since these defines are not really intended
to check for the presence of a particular library, but
rather are used to define an _interface_. Some programs
are especially chummy with glibc, and may need this
behavior disabled by adding CFLAGS+=-D__FORCE_NOGLIBC

If you want to make special exceptions in your code which are
specifically for uClibc, you can make certain to include features.h,
and then have your code check for uClibc as follows:

#ifdef __UCLIBC__
do_something_special();
#endif

And most of all, be sure to have some fun! :-)
-Erik