libc11: C11 standard library

libc11 is a public domain implementation of the C11 (ISO/IEC 9899:2011) standard library.

Features

• No build prerequisites beyond the Autotools toolchain and a C99 compiler.
• 100% free and unencumbered public domain software, usable in any context and for any purpose.

Current Status

This table summarizes which C11 features are implemented at present:

Header	Spec	Description	Status
<assert.h>	C11 7.2	Diagnostics.	WIP
<complex.h>	C11 7.3	Complex arithmetic.
<ctype.h>	C11 7.4	Character handling.	Implemented.
<errno.h>	C11 7.5	Errors.	WIP
<fenv.h>	C11 7.6	Floating-point environment.
<float.h>	C11 7.7	Characteristics of floating types.
<inttypes.h>	C11 7.8	Format conversion of integer types.	WIP
<iso646.h>	C11 7.9	Alternative spellings.	Implemented.
<limits.h>	C11 7.10	Sizes of integer types.	Implemented.
<locale.h>	C11 7.11	Localization.	WIP
<math.h>	C11 7.12	Mathematics.
<setjmp.h>	C11 7.13	Nonlocal jumps.
<signal.h>	C11 7.14	Signal handling.	WIP
<stdalign.h>	C11 7.15	Alignment.	Implemented.
<stdarg.h>	C11 7.16	Variable arguments.	Implemented. [1]
<stdatomic.h>	C11 7.17	Atomics.	WIP
<stdbool.h>	C11 7.18	Boolean type and values.	Implemented.
<stddef.h>	C11 7.19	Common definitions.	WIP
<stdint.h>	C11 7.20	Integer types.	WIP
<stdio.h>	C11 7.21	Input/output.	WIP
<stdlib.h>	C11 7.22	General utilities.	WIP
<stdnoreturn.h>	C11 7.23	_Noreturn.	Implemented.
<string.h>	C11 7.24	String handling.	WIP
<tgmath.h>	C11 7.25	Type-generic math.
<threads.h>	C11 7.26	Threads.
<time.h>	C11 7.27	Date and time.
<uchar.h>	C11 7.28	Unicode utilities.
<wchar.h>	C11 7.29	Wide character utilities.	Omitted. [2]
<wctype.h>	C11 7.30	Wide character utilities.	Omitted. [2]

Footnotes

[1]	Currently implemented only for the Clang and GCC compilers.

[2]	(1, 2) Purposely omitted from the library.

Installation

Installation on Unix

$ ./autogen.sh
$ ./configure
$ make
$ sudo make install
$ sudo ldconfig                      # on Linux

Elsewhere

Find this project at: GitHub, Bitbucket, Ohloh, Freecode, SourceForge, Travis CI, Twitter, Tumblr, and COD5.

Many other open-source implementations of the C standard library exist, though most of them are licensed more restrictively than this implementation:

• PDCLib (public domain)
• PDPCLIB (public domain)
• Bionic (BSD)
• dietlibc (GPL)
• EGLIBC (LGPL)
• glibc (LGPL)
• klibc (GPL/BSD)
• musl (MIT)
• Newlib (LGPL/BSD/etc)
• olibc (BSD)
• uClibc (LGPL)

Author

This project is part of the DRY initiative.

• Arto Bendiken - http://ar.to/

Donations

If you found this software useful and would like to encourage its maintenance and further development, please consider making a donation to the Bitcoin wallet address 1AiNcRvhxJQbBJ98Rcpyc8gtF3dGy8AxGQ.

License

This is free and unencumbered public domain software. For more information, see http://unlicense.org/ or the accompanying UNLICENSE file.