Glibc
From Gentoo Wiki
The GNU libc C library is the default C library included with Gentoo Linux.
Other C libraries are available in Gentoo including dev-libs/dietlibc and sys-libs/musl.
Installation
USE flags
USE flags for sys-libs/glibc GNU libc C library
audit
|
Enable support for Linux audit subsystem using sys-process/audit |
caps
|
Use Linux capabilities library to control privilege |
cet
|
Enable Intel Control-flow Enforcement Technology (needs binutils 2.29 and gcc 8) |
clone3
|
Enable the new clone3 syscall within glibc. Can be disabled to allow compatibility with older Electron applications. |
compile-locales
|
build *all* locales in src_install; this is generally meant for stage building only as it ignores /etc/locale.gen file and can be pretty slow |
crypt
|
build and install libcrypt and crypt.h |
custom-cflags
|
Build with user-specified CFLAGS (unsupported) |
debug
|
When USE=hardened, allow fortify/stack violations to dump core (SIGABRT) and not kill self (SIGKILL) |
doc
|
Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally |
experimental-loong
|
Add experimental LoongArch patchset |
gd
|
build memusage and memusagestat tools |
hash-sysv-compat
|
enable sysv linker hashes in glibc for compatibility with binary software (EAC via wine/proton) |
headers-only
|
Install only C headers instead of whole package. Mainly used by sys-devel/crossdev for toolchain bootstrap. |
multiarch
|
enable optimizations for multiple CPU architectures (detected at runtime) |
multilib
|
On 64bit systems, if you want to be able to compile 32bit and 64bit binaries |
multilib-bootstrap
|
Provide prebuilt libgcc.a and crt files if missing. Only needed for ABI switch. |
nscd
|
Build, and enable support for, the Name Service Cache Daemon |
perl
|
Install additional scripts written in Perl |
profile
|
Add support for software performance analysis (will likely vary from ebuild to ebuild) |
selinux
|
!!internal use only!! Security Enhanced Linux support, this must be set by the selinux profile or breakage will occur |
ssp
|
protect stack of glibc internals |
stack-realign
|
Realign the stack in the 32-bit build for compatibility with older binaries at some performance cost |
static-libs
|
Build static versions of dynamic libraries as well |
static-pie
|
Enable static PIE support (runtime files for -static-pie gcc option). |
suid
|
Make internal pt_chown helper setuid -- not needed if using Linux and have /dev/pts mounted with gid=5 |
systemd
|
Enable use of systemd-specific libraries and features like socket activation or session tracking |
systemtap
|
enable systemtap static probe points |
test
|
Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently) |
vanilla
|
Do not add extra patches which change default behaviour; DO NOT USE THIS ON A GLOBAL SCALE as the severity of the meaning changes drastically |
Upgrades
When glibc is upgraded it is wise to reload the running init system.
OpenRC
root #telinit usystemd
root #systemctl daemon-reloadUsage
Glibc locale system
See also
See the Localization/Guide article for more information.
See the Localization/Guide article for more information.
See also
See the Configure locales section (Gentoo Handbook) for more information.
See the Configure locales section (Gentoo Handbook) for more information.