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

Bernhard Reutner-Fischer 2cd5c90fc7 test/math: bessel depend on XSI_MATH 14 lat temu
docs 4d537e8547 libm: disable tail jump trick if __SSP_ALL__ (was using wrong conditional) 14 lat temu
extra 22bf234a71 Disables the automatic disable of shared library for sparc-v7. 14 lat temu
include 7e308604ee libm: improve readability of math.h; expand comments and docs 14 lat temu
ldso ffc5c7769d ldso/include/dl-hash.h: suppress compiler warning. no code changes 14 lat temu
libc c2acd98904 resolv.c fails for /etc/hosts lookups 14 lat temu
libcrypt 71239593ef nptl: proper soname handling 14 lat temu
libintl 59f3d4df3b intl, nptl_db: fix prerequisites 14 lat temu
libm 4d7ff2915e ldouble_wrappers: make code less verbose via WRAPPER2 macro 14 lat temu
libnsl 71239593ef nptl: proper soname handling 14 lat temu
libpthread c452a58e65 ntpl: fix static linking by not leaking SSP_ALL_CFLAGS 14 lat temu
libresolv 71239593ef nptl: proper soname handling 14 lat temu
librt 486fbd8d66 librt: fix linking WRT pthreads 14 lat temu
libubacktrace 37eb913ed8 libubacktrace: Provide uClibc with backtrace functions 14 lat temu
libutil 71239593ef nptl: proper soname handling 14 lat temu
test 2cd5c90fc7 test/math: bessel depend on XSI_MATH 14 lat temu
utils b2c4199f0f utils: Fix ldd segfault 14 lat temu
.gitignore a032a65870 mass sync with glibc nptl 14 lat temu
COPYING.LIB 751dd180c3 Update license file to Lesser GPL v2.1 19 lat temu
COPYING.LIB.boilerplate 99eb65208a boilerplate license we use 18 lat temu
Changelog 58a0daa6a5 add MULTILIB_DIR: Path component for libdirs 14 lat temu
DEDICATION.mjn3 38583d5986 Today's Toni's birthday. Seems an appropriate day to add this. 21 lat temu
INSTALL 37c4e78b3f fix a few typos and clean up the spacing (no tabs) 20 lat temu
MAINTAINERS 00ebae02f6 fix compilation of linuxthreads for sparc 15 lat temu
Makefile 105ceb0fdc always define CONFIG_SHELL 15 lat temu
Makefile.help 9160ed2054 buildsys: add brief mode; show defines and ld-flags 14 lat temu
Makefile.in 78e6de06e7 libc: Sort HEADERS_RM alphabetically 14 lat temu
Makerules 37eb913ed8 libubacktrace: Provide uClibc with backtrace functions 14 lat temu
README 331634d4c1 copyright update 18 lat temu
Rules.mak 871ea0e8c0 nptl: use correct unwind header for unwind-forcedunwind 14 lat temu
TODO 654c4f2b35 test commit 14 lat temu

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 LESSER 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 Lesser 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