user/sven/glibc.git/timezone, branch master

Update copyright dates with scripts/update-copyrights

2026-01-01T21:42:29Z

configure: Only use -Wno-discarded-qualifiers iff compiler supports it

2025-12-09T11:58:10Z

The clang analogous option is -Wno-incompatible-pointer-types-discards-qualifiers, so add a configure option to check which one compiler supports.

Implement C23 const-preserving standard library macros

2025-11-20T19:31:04Z

C23 makes various standard library functions, that return a pointer into an input array, into macros that return a pointer to const when the relevant argument passed to the macro is a pointer to const. (The requirement is for macros, with the existing function types applying when macro expansion is suppressed. When a null pointer constant is passed, such as integer 0, that's the same as a pointer to non-const.) Implement this feature. This only applies to C, not C++, since such macros are not an appropriate way of doing this for C++ and all the affected functions other than bsearch have overloads to implement an equivalent feature for C++ anyway. Nothing is done to apply such a change to any non-C23 functions with the same property of returning a pointer into an input array. The feature is also disabled when _LIBC is defined, since there are various places in glibc that either redefine these identifiers as macros, or define the functions themselves, and would need changing to work in the presence of these macro definitions. A natural question is whether we should in fact change those places and not disable the macro definitions for _LIBC. If so, we'd need a solution for the places in glibc that define the macro *before* including the relevant header (in order in effect to disable the header declaration of the function by renaming that declaration). One testcase has #undef added to avoid conflicting with this feature and another has const added; -Wno-discarded-qualifiers is added for building zic (but could be removed once there's a new upstream tzcode release that's const-safe with this C23 change and glibc has updated to code from that new release). Probably other places in glibc proper would need const added if we remove the _LIBC conditionals. Another question would be whether some GCC extension should be added to support this feature better with macros that only expand each argument once (as well as reducing duplication of diagnostics for bad usages such as non-pointer and pointer-to-volatile-qualfied arguments). Tested for x86_64.

configure: Use -Wno-maybe-uninitialized iff compiler supports it

2025-10-21T12:24:03Z

clang does not support the flag. Reviewed-by: Sam James

timezone: Enhance tst-bz28707 diagnostics

2025-04-10T08:08:30Z

This hopefully provides additional information about why the test failed, in case the fix in commit 62db87ab24f9ca483f97f ("timezone: Fix tst-bz28707 Makefile rule") turns out to be insufficient. Reviewed-by: Paul Eggert

Update copyright dates with scripts/update-copyrights

2025-01-01T19:22:09Z

Silence most -Wzero-as-null-pointer-constant diagnostics

2024-11-25T19:45:59Z

Replace 0 by NULL and {0} by {}. Omit a few cases that aren't so trivial to fix. Link: Link: Signed-off-by: Alejandro Colomar

timezone: sync to TZDB 2024b

2024-09-05T20:57:17Z

Sync tzselect, zdump, zic to TZDB 2024b. This patch incorporates the following TZDB source code changes: 6903dde3 Release 2024b 812aff32 Improve historical transitions in Mexico 1921-1997 52662566 Adjust to mailing list software change 7748036b Mention Internet RFC 9557 339e81d1 Mention Levine’s proposal to replace leap seconds b4e6ad2d No leap second on 2024-12-31 7eb5bf88 Asia/Choibalsan is now an alias for Asia/Ulaanbaatar 43450cbf Improve historical data for Portugal and former possessions. 13d7348b Typo and validation fixes. 3c39cde8 Fix typo for “removed” in a comment 03fd9e45 More documentation updates for POSIX.1-2024 eb3bcceb POSIX.1-2014 is now published 913b0410 tzselect: support POSIX.1-2024 offset range b5318b55 Document POSIX.1-2024 better 837609b7 Fix typo when making .txt man pages d56ae6ee SUPPORT_C89 now defaults to 1, not 0 b1fe113d Port ! to Solaris make 8f1fd321 Avoid crash in Solaris 10 /usr/xpg4/bin/make e0fcfdd6 Use ‘export VAR=VAL’ syntax eba43166 Avoid an awk invocation via $'...' 36479a80 Avoid some subshells in tzselect 7f6cf054 * tzselect.ksh: Assume POSIX.2 awk. a1cf1daf * tzselect.ksh: Assume POSIX.2 $PWD. a9b8e536 Assume POSIX.2 command substitution eaa4ef16 Avoid subshells when possible 9dac9eb7 Prefer $PWD to $(pwd) in Makefile fada6a4c Prefer $(CMD) to `CMD` in Makefile 3e871b9a Assume POSIX.2 and eschew ‘expr’ c5d67805 difftime isn’t pure either 5857c056 * CONTRIBUTING: Document build assumptions. 6822cc82 ‘make check’ no longer depends on curl+Internet cc6eb255 Document GCC bug 114833 and workaround bcbc86bf Scale back on function attribute use c0789e46 C23 [[reproducible]] and [[unsequenced]] fixups bbd88154 More updates to GCC_DEBUG_FLAGS for GCC 14 1a35b7c8 Spelling fixes f71085f2 POSIX.1-2024 removes asctime_r, ctime_r 70856f8e Adjust to refactored location of ctime, ctime_r aacd151d Update GCC_DEBUG_FLAGS for GCC 14 967dcf3b Sub-second history for Maputo and Zurich 782d0826 Make EET, MET and WET links a0b09c02 Mark CET, CST6CDT etc. as obsolescent db7fb40d Document SMPTE timecodes and rolling leaps 97232e18 Don’t be so sure about leap seconds going away 5b6a74fb Update some URLs a75a6251 * zic.8: Tweak for consistency. 1e75b31f Document what %s means before any rule applies 00c96cbb Conform to RFC 8536 section 3.2 for default type 3e944959 Document problems with stripped-down TZif readers 20fc91cf Shanks is likely wrong about Maputo switch to CAT d99589b6 * zic.8: Add missing tab character. 94e6b3b0 Switch to %z in main dataform 2cd57b93 Treat W-Eur like Port when reguarding ad6f6d94 Check that main.zi agrees with sources a43b030f .gitignore: Add .pdf, .ps, .s. Remove obsolete ‘yearistype’. 253ca020 * theory.html: ‘CLT’ → ‘LTC’ (per Michael H Deckers) a3dee8c8 * NEWS: ‘how’ → ‘now’ (thanks to Paul Goyette). ea6341c5 * theory.html: Mention NASA and CLT (per Arthur David Olson). 0dcebe37 America/Scoresbysund matches America/Nuuk from now on b1e07fb0 Update Vzic link (thanks to Allen Winter) a4b05030 Fix wday/mday typo in previous patch 732a4803 Document how to detect mktime failure reliably a64067e9 ziguard.awk: generalize for proposed Portugal patch 59c861fd Line up zdump examples 66c106c9 tzfile.5: srcfix e5553001 Fix .RS/.RE problem in tzfile.5 d647eb01 Add Doctorow book 59d4a1ba Asia/Almaty matches Asia/Tashkent from now on d4d3c3ba * asia: Update Philippine URLs (thanks to Guy Harris). 9fc11a27 Port unlikely overflow check to C23 b52a2969 Fix 2023d NEWS typo e48c5b53 Cite "The NTP Leap Second File" b1dc2122 Update Israel tz-link 6cf4e912 Extrapolate less from the 2022 CGPM resolution. It fixes glibc build with gcc master [1]. Checked on x86_64-linux-gnu and on i686-linux-gnu. [1] https://sourceware.org/pipermail/libc-alpha/2024-September/159571.html Reviewed-by: Paul Eggert

timezone: sync to TZDB 2024a

2024-04-07T20:35:48Z

Sync tzselect, zdump, zic to TZDB 2024a. This patch incorporates the following TZDB source code changes, listed roughly in descending order of importance. zic now supports links to links, needed for future tzdata zic now defaults to '-b slim' zic now updates output files atomically zic has new options -R, -l -, -p - zic -r now uses -00 for unspecified timestamps zdump now uses [lo,hi) for both -c and -t Fix several integer overflow bugs zic now checks input bytes more carefully Simplify and fix new TZDIR setup Default time_t to 64 bits on glibc 2.34+ 32-bit zic now generates TZ strings that conform to POSIX when all-year DST zic -v now shows extreme-int tm_year transitions Fix zic bug in last time type of Asia/Gaza etc. Fix zic bug with Palestine after 2075 Fix bug uncovered by recent change to Iran history Fix 'zic -b fat' bug with Port Moresby 32-bit data Fix zic bug with -r @X where X is deduced from TZ Fix bug with zic -r cutoff before 1st transition Fix leap second expiry and truncation Fix zic bug on Linux 2.6.16 and 2.6.17 Fix bug with 'zic -d /a/b/c' if /a is unwriteable Don't mistruncate TZif files at leap seconds Fix zdump undefined behavior if !USE_LTZ zdump -v reports localtime+gmtime failures better Fix zdump diagnostic for missing timezone Don't assume nonempty argv Port better to C23 Do not assume negative >> behavior I18nize zdump a bit better Port zdump to right_only installations New tzselect menu option 'now' tzselect can now use current time to help choose Improve tzselect behavior for Turkey etc. tzselect: do not create temporary files tzselect: work around mawk bug with {2,} tzselect: Port to POSIX awk, which prohibits -v newlines Do not use empty RE in tzselect Don't set TZ in tzselect Avoid sed, expr in tzselect tzselect: Fix problems with spaces in TZDIR Improve tzselect diagnostics Remove zic workaround for Qt bug 53071 Remove zic support for "min" in Rule lines Remove zic support for zic -y, Rule TYPEs, pacificnew Remove tzselect workaround for Bash 1.14.7 bug * SHARED-FILES: Update to match current sync. * config.h.in (HAVE_STRERROR): Remove; no longer needed. * timezone/Makefile ($(objpfx)zic.o): Depend on tzdir.h. ($(objpfx)tzdir.h): New rule to build a placeholder. * timezone/private.h, timezone/tzfile.h, timezone/version: * timezone/zdump.c, timezone/zic.c: Copy verbatim from TZDB 2024a.

Update copyright dates with scripts/update-copyrights

2024-01-01T18:53:40Z