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GNU implementation of the standard C library
The GNU C Library, commonly known as glibc, is the GNU Project implementation of the C standard library. It provides a wrapper around the system calls
Glibc
Implementation of C standard library for Linux operating system
clean, efficient, and standards-conformant libc implementation. Unlike glibc’s LGPL, musl’s MIT licence does not require distributors of statically linked
Musl
Linux distribution
for configuring the firewall capabilities. In version 6 Red Hat moved to glibc 2.1, egcs-1.2, and to the 2.2 kernel. It was the first version to use the
Red_Hat_Linux
Independent distribution developed entirely by volunteers
distributions. It is also unusual for allowing users to choose between glibc or musl for software repositories and installation media. Void was the first
Void_Linux
Standard library for the C programming language
implementations distributed with BSD-derived operating systems GNU C Library (glibc), used in GNU Hurd, GNU/kFreeBSD, and most Linux distributions The Microsoft
C_standard_library
Family of Unix-like operating systems that use the Linux kernel
most commonly used software library on Linux systems, the GNU C Library (glibc), there are numerous other libraries, such as SDL and Mesa. The C standard
Linux
General-purpose programming language
FFmpeg Fontconfig FreeTDS FreeType GD Graphics Library GDK GEGL GGI GIO GLib glibc GLFW GNet GNU Libtool GNU portability library GNU Portable Threads GNU Readline
C_(programming_language)
Key derivation function of password hash
for systems without bcrypt. It has been integrated into glibc in SUSE Linux. In August 2017, glibc announced plans to remove its crypt implementation completely
Crypt_(C)
Linux subsystem for filesystem monitoring
into the GNU C Library (glibc) in its version 2.4, released in March 2006, while the support for inotify was completed in glibc version 2.5, released in
Inotify
C standard library for Android operating system
Google for its Android operating system. It differs from the GNU C Library (glibc) in being designed for devices with less memory and processor power than
Bionic_(software)
Standard file format for executables, object code, shared libraries, and core dumps
Retrieved 27 April 2015. "glibc 2.12 announce". "sourceware.org Git - glibc.git/blob - libc-abis". "sourceware.org Git - glibc.git/blob - sysdeps/gnu/ldsodefs
Executable and Linkable Format
Executable_and_Linkable_Format
Compatibility layer to run Android drivers on glibc or musl-based Linux systems
symbols from bionic with glibc" calls, making it possible to use Bionic-based software, such as binary-only Android drivers, on glibc-based Linux distributions
Libhybris
memory String Time Variadic POSIX Implementations Bionic libhybris dietlibc glibc EGLIBC klibc Windows CRT musl Newlib uClibc Compilers ACK Borland Turbo
Split-C
Dynamic memory management in the C programming language
Malloc") as a general-purpose allocator, starting in 1987. The GNU C library (glibc) is derived from Wolfram Gloger's ptmalloc ("pthreads malloc"), a fork of
C_dynamic_memory_allocation
Linux distribution based on musl and BusyBox
and resource efficiency". It uses musl, BusyBox, and OpenRC instead of glibc, GNU Core Utilities, and systemd, respectively. This makes Alpine one of
Alpine_Linux
Header file for C programs
makes it even less portable than the sys_errlist table. The GNU C library (GLIBC) provides the additional POSIX error values macros in the header file <errno
Errno.h
Linux distribution
primary toolchain, instead of GCC musl as the system C library, replacing glibc mimalloc as the memory allocator, as musl's allocator is regarded as somewhat
Chimera_Linux
Cross-platform rapid application development runtime environment inspired by HyperCard
later kernel X11R5 capable Xserver running locally on a 24-bit display glibc 2.3.2 or later gtk/gdk/glib (optional – required for native theme support)
LiveCode
Processor family
Raises Base Target For x86_64 CPUs Plus Possible Optimized Libraries With glibc-hwcaps". Phoronix. Retrieved March 11, 2025. "Tumbleweed – Move to x86-64-v2
Intel_Core_2
Patched software backdoor
only when the system is being built on an x86-64 Linux system that uses glibc and GCC and is being built via dpkg or rpm. The US federal Cybersecurity
XZ_Utils_backdoor
Implementation of C standard library for embedded systems based on Linux
software. uClibc is much smaller than the glibc, the C library normally used with Linux distributions. While glibc is intended to fully support all relevant
UClibc
Handling of strings in the C programming language
internally in the Linux kernel. This did change in 2024, the glibc FAQ notes that as of glibc 2.38, the code has been committed and thereby added. These
C_string_handling
Free software collection
components include the GNU Compiler Collection (GCC), the GNU C library (glibc), and GNU Core Utilities (coreutils), but also the GNU Debugger (GDB), GNU
GNU
Book by Michael Kerrisk
Kerrisk, which documents the APIs of the Linux kernel and the GNU C Library (glibc). The book covers topics related to the Linux operating system and operating
The Linux Programming Interface
The_Linux_Programming_Interface
Algorithm for generating pseudo-randomized numbers
BASIC Programming, chapter 11". Retrieved 14 Mar 2025. Implementation in glibc-2.26 release. See the code after the test for "TYPE_0"; the GNU C library's
Linear_congruential_generator
Computer memory management methodology
accounting and size-checking, such as in the uses of alloca_account in glibc. The proper management of memory in an application is a difficult problem
Memory_management
Linux distribution
Precompiled binaries are available for some packages, but only for systems using Glibc; no precompiled binaries are available for Musl-based systems. Gentoo runs
Gentoo_Linux
Linux kernel mechanism
and supports more than four system calls. Some C standard libraries, like glibc, may provide vDSO links so that if the kernel does not have vDSO support
VDSO
Linux kernel APIs and ABIs
library are glibc uClibc klibc Newlib musl dietlibc libbionic and libhybris Although the landscape is shifting, amongst these options, glibc remains the
Linux_kernel_interfaces
Operating system for mobile devices
kernel. The main benefits of using Bionic instead of the GNU C Library (glibc) or uClibc are its smaller runtime footprint, and optimization for low-frequency
Android_(operating_system)
server-based distributions use GNU software such as the GNU C Library (glibc), GNU Core Utilities (coreutils), GNU Compiler Collection (GCC), GNU Binutils
GNU/Linux_naming_controversy
Way of using computer memory
malloc, memcpy, localtime, pthread_create, ... (up to 2000 subroutines) glibc aims to be fast, musl aims to be lightweight, uClibc targets embedded systems
User_space_and_kernel_space
Mobile operating system
protocol. It uses standard Linux middleware like Systemd, Pulseaudio and Qt. Glibc is the included C Library. The first Jolla Phone in 2013 used Btrfs for
Sailfish_OS
Minimalist implementation of C standard library
mode. These components do not have access to the standard library (usually glibc or musl) used by normal userspace programs. The development of klibc library
Klibc
Stream cipher
of arc4random in FreeBSD, NetBSD also use ChaCha20. Linux typically uses glibc, which did not offer arc4random until 2022. Instead, a separate library
RC4
Type of Linux installation
first packages to compile is glibc; after that, the toolchain's linker must be adjusted to link against the newly built glibc, so that all other packages
Linux_from_Scratch
Searching for patterns in text
notation. Used to implement the memmem and strstr search functions in the glibc and musl C standard libraries. Can be extended to handle approximate string
String-searching_algorithm
64-bit extension of x86 architecture
2 --help (available since glibc 2.33). The result will be visible at the end of command's output: Subdirectories of glibc-hwcaps directories, in priority
X86-64
Core of a computer operating system
operating system and normal user programs. Usually it is a C library such as Glibc or Windows API. The library handles the low-level details of passing information
Kernel_(operating_system)
Software that verifies hashes
code was written by Ulrich Drepper and extracted from a 2001 release of glibc. All of the following files are assumed to be in the current directory.
Md5sum
Project for adding Rust language to Linux kernel
tmpfs systemd udev Kmscon binfmt_misc Wrapper libraries C standard library glibc uClibc Bionic libhybris dietlibc EGLIBC klibc musl Newlib libcgroup libdrm
Rust_for_Linux
British software developer
direct binding, hashvals, and dynsort implementations for GNU Binutils and glibc. Most of this work was focused at making OpenOffice.org and now its fork
Michael Meeks (software developer)
Michael_Meeks_(software_developer)
Programming language
memory String Time Variadic POSIX Implementations Bionic libhybris dietlibc glibc EGLIBC klibc Windows CRT musl Newlib uClibc Compilers ACK Borland Turbo
Cilk
Official Chinese character encoding
"GB18030 iconv module for glibc". glibc git. Retrieved 29 November 2016. Drepper, Ulrich. "Update GB18030 to 2005 version". glibc git. Retrieved 29 November
GB_18030
Report of stack frames during program execution
not have native support for obtaining stack traces, but libraries such as glibc provide this functionality. In C and C++, some compiler optimizations may
Stack_trace
Library of C programs
memory String Time Variadic POSIX Implementations Bionic libhybris dietlibc glibc EGLIBC klibc Windows CRT musl Newlib uClibc Compilers ACK Borland Turbo
C_date_and_time_functions
Computer software bug occurring in 2038
original on 23 April 2025. Retrieved 19 August 2025. Y2038 Proofness Design glibc Wiki Entry in How Stuff Works The Project 2038 Frequently Asked Questions
Year_2038_problem
Unix access rights flag
LWN.net. Retrieved 30 March 2014. Edge, Jake (October 27, 2010). "Two glibc vulnerabilities". LWN.net. Retrieved 30 March 2014. McIlroy, M. Douglas
Setuid
secure. It uses musl, BusyBox, and OpenRC instead of the more commonly used glibc, GNU Core Utilities, and systemd. Owl - Openwall GNU/Linux, a security-enhanced
List of security-focused operating systems
List_of_security-focused_operating_systems
Object-oriented programming language
memory String Time Variadic POSIX Implementations Bionic libhybris dietlibc glibc EGLIBC klibc Windows CRT musl Newlib uClibc Compilers ACK Borland Turbo
C*
Type of parallel processing
quite commonly used in a number of performance-critical libraries such as glibc and libjpeg-turbo. Intel C++ Compiler, GNU Compiler Collection since GCC
Single instruction, multiple data
Single_instruction,_multiple_data
Unix command for configuring and caching shared library links
is found in most Linux distributions and FreeBSD, and it is part of the glibc package. ldconfig works by searching for .so files in directories specified
Ldconfig
Implementation of the C standard library for embedded systems
Native Client SDK (NaCl) includes Newlib as the default C library over glibc. In 2019, Keith Packard released Picolibc, a library offering standard C
Newlib
tests designed to confirm the behaviour of the Linux kernel as well as glibc. The LTP is a joint project started by SGI, developed and maintained by
Linux_Test_Project
In computing, a lock which causes a thread to loop continuously
This feature is built into some mutex implementations, for example in glibc. The Hardware Lock Elision (HLE) in x86 is a weakened but backwards-compatible
Spinlock
Display system intended to replace X11
Munk, Carsten (11 April 2013). "Wayland utilizing Android GPU drivers on glibc based systems, Part 1". Mer Project. Archived from the original on 19 April
Wayland_(protocol)
Web browser made by Mozilla
R2 Minimum GTK 3.14 or newer libstdc++ 4.8.1 or newer X.Org 1.0 or newer glibc 2.17 or newer Recommended NetworkManager 0.7 or newer DBus 1.0 or newer
Firefox
Integrated development environment
Server 2019) or later macOS Monterey or later A Linux 6.x distribution with glibc 2.28 or later that supports GNOME, KDE RAM 2 GB free RAM minimum; 8 GB RAM
IntelliJ_IDEA
Free and open-source compiler for various programming languages
Rodríguez (October 1, 2019). "Cutting Edge Toolchain (Latest Features in GCC/GLIBC)". youtube.com. Linux Foundation. Archived from the original on November
GNU_Compiler_Collection
Order of bytes in a computer word
BE, up to 32-bit). Windows has a 64-bit extension in winsock2.h. BSD and Glibc endian.h functions (from/to BE and LE, up to 64-bit). macOS OSByteOrder
Endianness
Security bug within OpenSSH, 2024
facing OpenSSH instances potentially vulnerable to the attack. It affects glibc-based Linux systems; Windows and OpenBSD systems are not vulnerable to the
RegreSSHion
Open source scanner application programming interface
(x64, x86), macOS 10.15+ (x64, arm64) and Linux (x64, arm64) (GTK 3.20+, glibc 2.27+, libsane). The supported file formats are PDF, TIFF, JPEG, or PNG
Scanner_Access_Now_Easy
Free Unix-like operating system kernel
malloc, memcpy, localtime, pthread_create, ... (up to 2000 subroutines) glibc aims to be fast, musl aims to be lightweight, uClibc targets embedded systems
Linux_kernel
Standard UNIX utility
Retrieved 21 April 2018. "glibc: iconv/iconv.c". Archived from the original on 19 January 2025. Retrieved 30 November 2016. "glibc: iconv/iconv_prog.c". Archived
Iconv
Function whose job is only to call another subroutine
interfaces for abstraction of system calls. The fork and execve functions in glibc are examples of this. They call the lower-level fork and execve system calls
Wrapper_function
Form of computer memory allocation
accounting and size-checking, such as in the uses of alloca_account in glibc. Some processor families, such as the x86, have special instructions for
Stack-based_memory_allocation
Operating system based on the Linux kernel
by noting the lack of support for many GNU tools in Android, including glibc. Other Linux-kernel-based operating systems include Tizen, Mer/Sailfish
Linux_distribution
64-bit computer number format
The library implements math functions for environments built on gcc and glibc. It uses BID-encoded IEEE 754 decimal types, with the possibility to switch
Decimal64 floating-point format
Decimal64_floating-point_format
Topics referred to by the same term
Lesbian Information Bureau (GLIB), a defunct bulletin board and website glibc, the GNU C Library Gnulib, the GNU portability library This disambiguation
Glib
Line-oriented text editor
these constraints loosened, editors with more feedback became the norm. The glibc documentation notes an error code called ED with its description (errorstr)
Ed_(text_editor)
Header file for C programs
memory String Time Variadic POSIX Implementations Bionic libhybris dietlibc glibc EGLIBC klibc Windows CRT musl Newlib uClibc Compilers ACK Borland Turbo
Stdarg.h
Offset that corresponds to the first byte beyond the length of a computer file
implementation-dependent and must be negative (it is commonly −1, such as in glibc). Block-reading functions return the number of bytes read, and if this is
End-of-file
users of the Microsoft Windows version. Applying the GTK+ widget toolkit, Glibc, and libstdc++, Nero Linux reproduced most of the features of Nero Burning
Nero_Linux
Cyberattack via an industry's supply chain
of xz that predate the affected releases and the attack targets Linux's glibc. On October 31, 2024, cybersecurity researchers from several security firms
Supply_chain_attack
Boot loader package
Modified General Public License Software GNU (variants) Hurd Linux-libre glibc Bash coreutils findutils Build system GCC binutils GDB GRUB GNUstep GIMP
GNU_GRUB
File synchronization protocol and software
· kristapsdz/openrsync". It currently is portable across Linux (glibc and musl), FreeBSD, NetBSD, Mac OS X, and OmniOS.{{cite web}}: CS1 maint:
Rsync
C function to format and output text
formatting function for non-builtin types. One is the (now deprecated) glibc's register_printf_function(). However, it is rarely used due to the fact
Printf
Programming language
FFmpeg Fontconfig FreeTDS FreeType GD Graphics Library GDK GEGL GGI GIO GLib glibc GLFW GNet GNU Libtool GNU portability library GNU Portable Threads GNU Readline
Outline of the C programming language
Outline_of_the_C_programming_language
Translator library for raster and vector geospatial data formats
director of the Open Source Geospatial Foundation, "I see GDAL as the glibc/glibc++ of the geospatial software world. It's open, it provides core functionality
GDAL
Character encodings for Japanese on EBCDIC mainframes
CVE entry (CVE-2026-4046) was reported for a bug in the GNU C Library (glibc) versions 2.43 and below, causing a process crash (with the associated denial
Japanese_language_in_EBCDIC
Operating system kernel designed as a replacement for Unix
framework for the L4/Hurd port, and Marcus Brinkmann ported essential parts of glibc; namely, getting the process startup code working, allowing programs to
GNU_Hurd
Extensions to the x86 instruction set architecture
initial support committed on 25 June 2020[dead link] Operating system support glibc support for detecting AMX feature in CPUs committed on 25 June 2020 Linux
Advanced_Matrix_Extensions
GNU internationalization and localization software
(the other option is the X/Open catgets), so many C libraries, including glibc, implemented both. As of August 2019[update], whether gettext should be
Gettext
Suite of system components for Linux
may have been used on embedded systems, whereas systemd only supported glibc. The uselessd project had planned further improvements on cross-platform
Systemd
C standard library header file
memory String Time Variadic POSIX Implementations Bionic libhybris dietlibc glibc EGLIBC klibc Windows CRT musl Newlib uClibc Compilers ACK Borland Turbo
C_mathematical_functions
Operating system
ports, including Vim, Perl, Python, Apache, others. GNU toolchain (GCC, Glibc, Binutils, Make) Preemptive multitasking with multithreading Symmetric multiprocessing
Syllable_Desktop
1999 video game
modifications "Dropping support for Windows XP/2003, Windows Vista/2008, and Linux GLIBC <2.24 as of Sven Co-op 5.18". Steam. Valve Corporation. December 12, 2018
Sven_Co-op
Linux system call for I/O event notification mechanism
epoll_create1() and is deprecated as of Linux kernel version 2.6.27 and glibc version 2.9. int epoll_ctl(int epfd, int op, int fd, struct epoll_event*
Epoll
Date and time representation system widely used in computing
from the original on 1 May 2023. Retrieved 1 May 2023. "The GNU C Library (glibc)". The GNU Operating Sisyem. Free Software Foundation. Archived from the
Unix_time
Way for programs to access kernel services
API is usually part of an implementation of the C library (libc), such as glibc, that provides wrapper functions for the system calls, often named the same
System_call
Russian computer security specialist (born 1977)
award". Retrieved 2010-12-17. Qualys (2015-01-27). "CVE-2015-0235 - GHOST: glibc gethostbyname buffer overflow". Seclists.org. Retrieved 2015-03-21. Openwall
Solar_Designer
Book by Brian Kernighan and Dennis Ritchie
FFmpeg Fontconfig FreeTDS FreeType GD Graphics Library GDK GEGL GGI GIO GLib glibc GLFW GNet GNU Libtool GNU portability library GNU Portable Threads GNU Readline
The_C_Programming_Language
Operating system distribution
Linux 8 (Ootpa) is based on Fedora 28, upstream Linux kernel 4.18, GCC 8.2, glibc 2.28, systemd 239, GNOME 3.28, and the switch to Wayland. The first beta
Red_Hat_Enterprise_Linux
String-searching algorithm
implemented in well-optimized subroutines. It is used by the C standard libraries glibc, newlib, and musl, to implement the memmem and strstr family of substring
Two-way string-matching algorithm
Two-way_string-matching_algorithm
Preservation of legal rights in the reuse of a work
license to be compiled and linked against copylefted libraries such as glibc and then redistributed without any re-licensing required. The concrete effect
Copyleft
Journaling file system for Linux
require a new version) and the various libraries that depend on them (like glibc). These changes will require coordination of many projects. Therefore, the
Ext4
C programming language standard, current revision
convert time structure into calendar time value - similar to function in glibc and musl libraries. New <math.h> functions based on IEEE 754-2019 recommendations
C23_(C_standard_revision)
Replacing a number with a simpler value
elementary-function library". Archived from the original on 2021-03-01. "Git - glibc.git/commit". Sourceware.org. Retrieved 2022-07-18. de Dinechin, Florent;
Rounding
128-bit computer number format
128-Bit Long Double Floating-Point Data Type. sourceware.org Re: The state of glibc libm "Intel Fortran Compiler Product Brief (archived copy on web.archive
Quadruple-precision floating-point format
Quadruple-precision_floating-point_format
Computer security technique
hand is limited by the behavior of the memory allocator; in the case of glibc, allocations above 128 KB are created using mmap, limiting attackers to
Address space layout randomization
Address_space_layout_randomization
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GLIBC
GLIBC
GLIBC
GLIBC
GLIBC
GLIBC
GLIBC
GLIBC
GLIBC
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