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musl - an implementation of the standard library for Linux-based systems
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Rich Felker 868c964300 remove wide printf dependency on ugly hack in vfprintf 
commit d42269d7c8 appropriated the
stream error flag temporarily to let the printf family of functions
suppress further output attempts after encountering a write error.
since the wide printf code relies on (narrow) vfprintf to print
padding and numeric conversions, a hack was put in vfprintf not to
clear the initial error status unless the stream is narrow oriented.
this was okay, because calling vfprintf on a wide-oriented stream
(outside of internal use by the implementation) produces undefined
behavior. however, it was highly non-obvious to anyone reading the
wide printf code, where the calls to fprintf without first checking
for error status appeared erroneous.

this patch removes all direct use of fprintf from the wide printf
core, except in the numeric conversions case where it was already
checked before starting processing of the directive that the error
status is not set. the other calls, which were performing padding, are
replaced by a new pad() helper function, which performs the check and
abstracts out the mechanism of writing the padding.

direct use of the error flag is also replaced by ferror, which is
defined as a macro in stdio_impl.h, expanding directly to the flag
check with no call or locking overhead.
2023-03-21 09:11:17 -04:00
arch fix wrong sigaction syscall ABI on mips*, or1k, microblaze, riscv64 2023-02-09 12:33:35 -05:00
compat/time32 remove LFS64 symbol aliases; replace with dynamic linker remapping 2022-10-19 14:01:31 -04:00
crt remove unnecessary and problematic _Noreturn from crt/ldso startup 2019-06-25 19:05:40 -04:00
dist add another example option to dist/config.mak 2012-04-24 16:49:11 -04:00
include fix incorrect unit for CPU_SETSIZE macro 2023-02-23 10:10:44 -05:00
ldso fix debugger tracking of shared libraries on mips with PIE main program 2023-01-18 10:32:14 -05:00
src remove wide printf dependency on ugly hack in vfprintf 2023-03-21 09:11:17 -04:00
tools fix incorrect escaping in add-cfi.*.awk scripts 2020-01-20 15:57:29 -05:00
.gitignore remove obsolete gitignore rules 2016-07-06 00:21:25 -04:00
.mailmap update contributor name 2019-12-07 12:21:35 -05:00
configure configure: disable TBAA optimization because most compilers are buggy 2022-10-19 14:01:31 -04:00
COPYRIGHT add optimized aarch64 memcpy and memset 2020-06-26 17:49:51 -04:00
dynamic.list fix regression in access to optopt object 2018-11-19 13:20:41 -05:00
INSTALL fix typo in INSTALL 2020-11-29 00:46:38 -05:00
Makefile make mallocng the default malloc implementation 2020-06-30 15:38:27 -04:00
README update version reference in the README file 2014-06-25 14:16:53 -04:00
VERSION release 1.2.3 2022-04-07 13:12:40 -04:00
WHATSNEW release 1.2.3 2022-04-07 13:12:40 -04:00

README 

    musl libc

musl, pronounced like the word "mussel", is an MIT-licensed
implementation of the standard C library targetting the Linux syscall
API, suitable for use in a wide range of deployment environments. musl
offers efficient static and dynamic linking support, lightweight code
and low runtime overhead, strong fail-safe guarantees under correct
usage, and correctness in the sense of standards conformance and
safety. musl is built on the principle that these goals are best
achieved through simple code that is easy to understand and maintain.

The 1.1 release series for musl features coverage for all interfaces
defined in ISO C99 and POSIX 2008 base, along with a number of
non-standardized interfaces for compatibility with Linux, BSD, and
glibc functionality.

For basic installation instructions, see the included INSTALL file.
Information on full musl-targeted compiler toolchains, system
bootstrapping, and Linux distributions built on musl can be found on
the project website:

    http://www.musl-libc.org/