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Robert Clausecker 6c57e368eb lib/libc: implement C23 memalignment() 
This new function computes the alignment of a pointer.
It is part of ISO/IEC 9899:2024, the new C standard.
If the pointer is a null pointer, null is returned.
I have tried to write an implementation that can cope
with traditional address-based architectures, even if
size_t and uintptr_t are of different length.  Adjustments
may be needed for CHERI though.

A man page is provided, too.  No unit test for now.

Reviewed by:	kib, imp, ziaee (manpages), pauamma@gundo.com
Approved by:	markj (mentor)
MFC after:	1 month
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D53673
2025-11-12 13:23:09 +01:00
..
atf
atf: Move the tests back to the tests package
2025-11-05 21:16:32 +00:00
clang
Update main to 16
2025-09-04 16:06:47 -07:00
csu
csu/tests: Add tests to verify that errno == 0 upon program startup
2025-06-24 01:24:04 +00:00
geom
gshsec.8: Fix list alignment, tag spdx
2025-10-30 11:51:06 -04:00
googletest
lib/googletest: Move to a new googletest package
2025-11-06 15:20:52 +00:00
lib9p
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
lib80211
net80211: regdomain: ETSI: add missing 11a and 11na entries
2025-07-07 06:49:02 +00:00
libalias
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libarchive
packages: Install development manpages in the -dev package
2025-10-26 02:26:06 +00:00
libauditd
package: move OpenBSM auditing into its own package
2024-04-28 22:33:06 -06:00
libbe
packages: Use LIB_PACKAGE for zfs and ufs packages
2025-09-12 21:56:51 +01:00
libbearssl
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libbegemot
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libblacklist
blacklist: Avoid duplicate manual pages in METALOG
2025-10-13 01:19:18 +00:00
libblocklist
blocklist: Rename blacklist to blocklist
2025-10-12 17:14:27 +00:00
libblocksruntime
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libbluetooth
libbluetooth: Move to the bluetooth-lib package
2025-10-12 16:28:20 +01:00
libbsddialog
contrib/bsddialog: import 1.1
2025-11-03 21:18:46 +01:00
libbsdstat
wlanstat(8): Follow-ups after moving to /usr/sbin and renaming
2025-09-30 11:31:12 +08:00
libbsm
libbsm: Rename package to audit-lib
2025-09-30 09:14:58 +01:00
libbsnmp
libbsnmp: make binding of client UNIX socket optional and configurable
2025-07-25 13:10:17 -07:00
libbz2
libbz2: add pkg-config file (bzip2.pc)
2025-10-09 22:35:54 -07:00
libc
lib/libc: implement C23 memalignment()
2025-11-12 13:23:09 +01:00
libc_nonshared
Retire MK_PROFILE infrastructure
2024-11-12 12:11:51 -05:00
libc++
Merge llvm-project release/19.x llvmorg-19.1.3-0-gab51eccf88f5
2024-11-08 17:45:31 +01:00
libc++experimental
Retire MK_PROFILE infrastructure
2024-11-12 12:11:51 -05:00
libcalendar
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libcam
libcam: Include nvme opcode and status code routines from nvme_util.c
2025-06-05 21:28:38 -04:00
libcapsicum
manuals: Fix "skipping end of block" .Ed errors
2024-10-03 14:49:23 -03:00
libcasper
libcasper: Move everything to the libcasper package
2025-11-05 00:38:07 +00:00
libcbor
Update Makefile.depend files
2024-10-14 10:26:17 -07:00
libclang_rt
Partially revert 6527682ab7 for llvm-based projects
2025-04-24 16:36:40 +02:00
libcom_err
kerberos5: Fix the Heimdal pkgbase build
2025-09-04 14:53:02 +01:00
libcompat
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libcompiler_rt
libgcc_s: export integer and floating point __aeabi_ symbols
2025-05-04 13:48:32 +02:00
libcrypt
packages: Improve handling of -lib packages
2025-08-23 01:57:23 +01:00
libcuse
Remove $FreeBSD$: one-line nroff pattern
2023-08-16 11:55:15 -06:00
libcxxrt
src: Use gnu++17 as the default C++ standard
2025-04-11 09:53:50 -04:00
libder
lib: hook libder up to the build
2025-01-01 15:11:06 -06:00
libdevctl
manuals: Fix some "missing section argument"
2024-10-15 17:20:55 -03:00
libdevdctl
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libdevinfo
libdevinfo: Avoid false positives for the root0 sentinel value
2025-01-29 10:03:59 -05:00
libdevstat
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libdiff
*/*: remove recallocarray() compat shims following import into libc
2025-10-03 19:47:52 +02:00
libdl
_dl_iterate_phdr_locked(): fix libc and libdl
2024-11-14 06:14:05 +02:00
libdpv
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libdwarf
Remove $FreeBSD$: one-line sh pattern
2023-08-16 11:55:03 -06:00
libedit
packages: Install development manpages in the -dev package
2025-10-26 02:26:06 +00:00
libefivar
efivar: Kill needless sys/cdefs.h
2025-05-25 07:49:32 -06:00
libelf
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libelftc
libelftc: Move to toolchain package
2025-08-23 01:57:23 +01:00
libevent1
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libexecinfo
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libexpat
MFV: expat 2.7.3.
2025-09-28 21:28:12 -07:00
libfdt
libfdt: Make an internal FDT library available
2024-03-21 01:05:05 -04:00
libfetch
lib: Fix calls that naively set F_SETFD.
2025-07-17 17:00:32 +00:00
libfido2
*/*: remove recallocarray() compat shims following import into libc
2025-10-03 19:47:52 +02:00
libfigpar
Refactor error handling in lseek operations
2024-09-21 05:25:15 -06:00
libgcc_eh
src: Use gnu++17 as the default C++ standard
2025-04-11 09:53:50 -04:00
libgcc_s
libgcc_s: export integer and floating point __aeabi_ symbols
2025-05-04 13:48:32 +02:00
libgeom
libgeom: Avoid fixed remappings of the devstat device
2024-08-19 16:02:59 +00:00
libgpio
libgpio: Add and document gpio interrupt utility functions
2025-09-03 21:01:05 +03:00
libgssapi
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libiconv_modules
Retire MK_PROFILE infrastructure
2024-11-12 12:11:51 -05:00
libifconfig
libifconfig: Add netlink based helper to bring the interface up/down
2025-08-29 17:39:39 +02:00
libipsec
libipsec: decode SADB_X_EXT_IF_HW_OFFL
2024-07-12 06:29:31 +03:00
libipt
Update Makefile.depend files
2024-10-14 10:26:17 -07:00
libiscsiutil
Remove redundant PACKAGE for INTERNALLIB libraries
2025-08-23 01:57:23 +01:00
libjail
jaildesc: remove desc from the sysctl parameter list
2025-09-13 15:30:14 -07:00
libkiconv
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libkldelf
libkldelf: add see_local parameter to elf_lookup_symbol
2024-10-25 16:20:16 +00:00
libkvm
kvm_proclist(): Restore outputting the effective GID
2025-09-09 17:56:49 +02:00
libldns
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
liblua
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
liblutok
lutok: Switch from std::auto_ptr<> to std::unique_ptr<>
2025-04-16 10:09:18 -04:00
liblzma
packages: Rename liblzma package to xz
2025-09-30 09:14:46 +01:00
libmagic
packages: Install development manpages in the -dev package
2025-10-26 02:26:06 +00:00
libmd
lib/libmd: import aarch64 md5 SIMD implementation
2025-10-24 12:17:11 +02:00
libmemstat
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libmilter
sendmail: Move libmilter to its own package
2025-08-16 21:07:57 +01:00
libmixer
packages: Add a sound package
2025-10-02 02:37:35 +01:00
libmp
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libmt
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libnetbsd
Remove redundant PACKAGE for INTERNALLIB libraries
2025-08-23 01:57:23 +01:00
libnetgraph
lib: Automated cleanup of cdefs and other formatting
2023-11-26 22:23:59 -07:00
libnetmap
Update Makefile.depend files
2024-10-14 10:26:17 -07:00
libnv
libnv: add tests to verify potential overflow issues
2024-09-04 13:43:16 +02:00
libnvmf
libnvmf: Fix a typo in a source code comment
2025-08-25 10:33:32 +02:00
libomp
Partially revert 6527682ab7 for llvm-based projects
2025-04-24 16:36:40 +02:00
libopenbsd
lib/libc: add recallocarray()
2025-10-03 19:46:55 +02:00
libopencsd
lib: Move libopencsd to /usr/lib and make private
2025-07-30 11:11:38 +01:00
libpam
libpam: Move to a new "pam" package
2025-11-10 11:05:37 +00:00
libpathconv
manuals: Fix "missing end of block" errors
2024-10-07 15:40:58 -03:00
libpcap
packages: Install development manpages in the -dev package
2025-10-26 02:26:06 +00:00
libpe
Remove $FreeBSD$: one-line sh pattern
2023-08-16 11:55:03 -06:00
libpfctl
pf: convert DIOCRGETADDRS to netlink
2025-11-05 14:59:29 +01:00
libpjdlog
lib: Automated cleanup of cdefs and other formatting
2023-11-26 22:23:59 -07:00
libpmc
libpmc: Move libpmc and utils to a new pmc package
2025-09-23 23:06:33 +01:00
libpmcstat
Remove redundant PACKAGE for INTERNALLIB libraries
2025-08-23 01:57:23 +01:00
libproc
Fix proc_signame() to use sig2str()
2025-06-11 17:16:22 -06:00
libprocstat
libprocstat: procstat_getgroups_kvm(): Output again the effective GID
2025-09-17 14:16:00 +02:00
libradius
packages: Install development manpages in the -dev package
2025-10-26 02:26:06 +00:00
libregex
libregex: fix our mapping for \w
2025-08-08 13:27:26 -05:00
librpcsec_gss
gssapi,krb5: Replace libgssapi with the MIT version
2025-08-07 10:17:00 -07:00
librpcsvc
Revert "Remove Secure RPC DES authentication"
2025-08-15 17:59:18 +01:00
librss
manuals: Misc syntax fixes
2024-10-08 16:13:39 -03:00
librt
Update Makefile.depend files
2024-10-14 10:26:17 -07:00
librtld_db
Remove "All Rights Reserved" from FreeBSD Foundation copyrights
2024-07-30 12:16:36 -04:00
libsamplerate
packages: Add a sound package
2025-10-02 02:37:35 +01:00
libsbuf
lib/libsbuf/tests: reformat with clang-format
2024-12-01 20:39:52 -08:00
libsdp
libsdp: Move to bluetooth-lib package
2025-09-30 09:14:51 +01:00
libsecureboot
Add DEBUG_PRINTF to stand.h
2025-07-17 16:36:17 -07:00
libsm
Remove redundant PACKAGE for INTERNALLIB libraries
2025-08-23 01:57:23 +01:00
libsmb
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libsmdb
Remove redundant PACKAGE for INTERNALLIB libraries
2025-08-23 01:57:23 +01:00
libsmutil
Remove redundant PACKAGE for INTERNALLIB libraries
2025-08-23 01:57:23 +01:00
libsqlite3
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libssp
Update Makefile.depend files
2024-10-14 10:26:17 -07:00
libssp_nonshared
Retire MK_PROFILE infrastructure
2024-11-12 12:11:51 -05:00
libstats
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libstdbuf
libstdbuf: Move to the utilities package
2025-09-30 09:15:04 +01:00
libstdthreads
libstdthreads: Move to the runtime package
2025-09-30 09:14:38 +01:00
libsys
libsys: install manpage links for jail_attach_jd/jail_remove_jd
2025-11-06 19:10:13 -06:00
libsysdecode
blocklist: Rename blacklist to blocklist
2025-10-12 17:14:27 +00:00
libtacplus
packages: Install development manpages in the -dev package
2025-10-26 02:26:06 +00:00
libtelnet
Remove redundant PACKAGE for INTERNALLIB libraries
2025-08-23 01:57:23 +01:00
libthr
libthr: GC unused _sigsuspend()
2025-08-06 12:31:24 +01:00
libthread_db
Remove "All Rights Reserved" from FreeBSD Foundation copyrights
2024-07-30 12:16:36 -04:00
libucl
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libufs
packages: Use LIB_PACKAGE for zfs and ufs packages
2025-09-12 21:56:51 +01:00
libugidfw
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libulog
Retire MK_PROFILE infrastructure
2024-11-12 12:11:51 -05:00
libunbound
unbound: Vendor import 1.24.1
2025-10-23 12:03:29 -07:00
libusb
libusb: implement libusb_get_platform_descriptor
2025-08-06 10:05:40 -04:00
libusbhid
libusbhid: add missing include guards
2024-06-06 10:09:05 -04:00
libutil
libutil: defer setting the MAC label until after the login class
2025-10-28 21:37:21 -05:00
libutil++
libutil++: Rename manpage source files to avoid colons
2025-08-26 16:44:38 -04:00
libveriexec
manuals: Fix "unusual .Xr" warnings with a script
2024-10-15 17:18:14 -03:00
libvgl
lib/libvgl/main.c: remove an extra semicolon
2024-02-02 18:35:01 -07:00
libvmmapi
libvmmapi: Add support for setting up and configuring guest NUMA domains
2025-07-27 18:31:48 +02:00
libwrap
packages: Install development manpages in the -dev package
2025-10-26 02:26:06 +00:00
libxo
packages: Install development manpages in the -dev package
2025-10-26 02:26:06 +00:00
liby
liby: Move to toolchain package
2025-09-30 09:14:05 +01:00
libyaml
libyaml: import libyaml vendor version 0.2.5
2025-06-26 09:02:31 +02:00
libypclnt
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
libz
zlib: Move to a new zlib package
2025-10-28 19:24:55 +00:00
libzstd
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
msun
libm: remainder: make sure x is zero
2025-10-11 13:13:19 +03:00
ncurses
packages: Install development manpages in the -dev package
2025-10-26 02:26:06 +00:00
nss_tacplus
packages: Install development manpages in the -dev package
2025-10-26 02:26:06 +00:00
ofed
lib/ofed: Move to the rdma package
2025-11-06 15:20:52 +00:00
tests
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
virtual_oss
virtual_oss: Move plugins to the sound package
2025-10-12 16:29:17 +01:00
Makefile
contrib/bsddialog: import 1.1
2025-11-03 21:14:09 +01:00
Makefile.inc
Remove $FreeBSD$: one-line sh pattern
2023-08-16 11:55:03 -06:00