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* libc: Purge unneeded cdefs.hWarner Losh2023-11-011-1/+0
| | | | | | | | | These sys/cdefs.h are not needed. Purge them. They are mostly left-over from the $FreeBSD$ removal. A few in libc are still required for macros that cdefs.h defines. Keep those. Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D42385
* Remove $FreeBSD$: one-line .c patternWarner Losh2023-08-161-2/+0
| | | | Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
* lib/libc/string/ffs*.c: work around gcc warningRobert Clausecker2023-07-141-1/+1
| | | | | | | | | | | | | | | Gcc warns of infinite recursion if we use __builtin_ffs*() to implement ffs*(). This is because gcc uses ffs() to implement these on some platforms. Sidestep the warning by using __builtin_ctz*() for these. Sponsored by: FreeBSD Foundation Reported by: jlduran@gmail.com, jhb Fixes: ee8b0c43 (D40730) Reviewed by: jhb, mhorne Approved by: jhb MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D40966
* lib/libc/string: replace ffs/fls implementations with clang builtinsRobert Clausecker2023-07-031-7/+5
| | | | | | | | | | | | | | Most architectures we support (except for riscv64) have instructions to compute these functions very quickly. Replace old code with the ffs and clz builtin functions, allowing clang to generate good code for all architectures. As a consequence, toss out arm and i386 ffs() implementations. Sponsored by: FreeBSD Foundation Approved by: mhorne MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D40730
* General further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-201-0/+2
| | | | | | | | | | | | | | | | | Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point. Notes: svn path=/head/; revision=326025
* Renumber clauses to reduce diffs to other versionsEd Maste2013-05-281-1/+1
| | | | | | | | NetBSD, OpenBSD, and Android's Bionic number the clauses 1 through 3, so follow suit to make comparison easier. Notes: svn path=/head/; revision=251069
* Fix style.Konstantin Belousov2008-11-031-1/+1
| | | | Notes: svn path=/head/; revision=184586
* Per Regents of the University of Calfornia letter, remove advertisingWarner Losh2007-01-091-4/+0
| | | | | | | | | clause. # If I've done so improperly on a file, please let me know. Notes: svn path=/head/; revision=165903
* Translate from GNU C to ISO C.Dag-Erling Smørgrav2004-01-141-1/+1
| | | | Notes: svn path=/head/; revision=124514
* Add and document ffsl(), fls() and flsl().Dag-Erling Smørgrav2004-01-131-0/+52
Notes: svn path=/head/; revision=124483
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