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In a subsequent commit we're going to add the first caller to
writev(3p). Introduce a compatibility wrapper for this syscall that we
can use on systems that don't have this syscall.
The syscall exists on modern Unixes like Linux and macOS, and seemingly
even for NonStop according to [1]. It doesn't seem to exist on Windows
though.
[1]: http://nonstoptools.com/manuals/OSS-SystemCalls.pdf
[2]: https://www.gnu.org/software/gnulib/manual/html_node/writev.html
Helped-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The `__MINGW64__` constant is defined, surprise, surprise, only when
building for a 64-bit CPU architecture.
Therefore using it as a guard to define `_POSIX_C_SOURCE` (so that
`localtime_r()` is declared, among other functions) is not enough, we
also need to check `__MINGW32__`.
Technically, the latter constant is defined even for 64-bit builds. But
let's make things a bit easier to understand by testing for both
constants.
Making it so fixes this compile warning (turned error in GCC v14.1):
archive-zip.c: In function 'dos_time':
archive-zip.c:612:9: error: implicit declaration of function 'localtime_r';
did you mean 'localtime_s'? [-Wimplicit-function-declaration]
612 | localtime_r(&time, &tm);
| ^~~~~~~~~~~
| localtime_s
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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GIT_GNUC_PREREQ() uses a glibc-style bit-shift version comparison,
which is harder to read than an explicit major/minor comparison.
Use an explicit comparison, as in many BSD <sys/cdefs.h> headers, and
drop the Linux header attribution comment because it no longer applies.
Signed-off-by: Dominik Loidolt <dominik.loidolt@univie.ac.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Fix the preprocessor indentation of the GIT_GNUC_PREREQ() and UNUSED
macros according to the CodingGuidelines, without changing their
behavior.
Adjust the spelling in the GIT_GNUC_PREREQ() comment block.
Signed-off-by: Dominik Loidolt <dominik.loidolt@univie.ac.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Use a dedicated Clang version check for the UNUSED macro.
Commit 7c07f36ad2 (git-compat-util.h: GCC deprecated message arg only in
GCC 4.5+, 2022-10-05) restricted use of the deprecated attribute's
message argument in the UNUSED macro to GCC 4.5 or newer.
Clang identifies itself as GNUC 4.2.1 for compatibility, so
GIT_GNUC_PREREQ(4, 5) does not detect whether Clang supports the
deprecated("...") form. Add GIT_CLANG_PREREQ() macro and use it to
enable the UNUSED warning message for Clang 2.9 and newer.
Signed-off-by: Dominik Loidolt <dominik.loidolt@univie.ac.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This reverts commit 3b9b2c2a29a1d529ca9884fa0a6529f6e2496abe; let's
not use writev() for now.
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Git for Windows doesn't support anything prior to Windows 8.1 since 2.47.0
and Git followed along with commits like ce6ccba (mingw: drop Windows
7-specific work-around, 2025-08-04).
There is no need to pretend to the compiler that we still support Windows
Vista, just to lock us out of easy access to newer APIs. There is also no
need to have conflicting and unused definitions claiming we support some
versions of Windows XP or even Windows NT 4.0.
Bump all definitions of _WIN32_WINNT to a realistic value of Windows 8.1.
This will also simplify code for a followup commit that will improve cpu
core detection on multi-socket systems.
Signed-off-by: Matthias Aßhauer <mha1993@live.de>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a subsequent commit we're going to add the first caller to
writev(3p). Introduce a compatibility wrapper for this syscall that we
can use on systems that don't have this syscall.
The syscall exists on modern Unixes like Linux and macOS, and seemingly
even for NonStop according to [1]. It doesn't seem to exist on Windows
though.
[1]: http://nonstoptools.com/manuals/OSS-SystemCalls.pdf
[2]: https://www.gnu.org/software/gnulib/manual/html_node/writev.html
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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gitmkdtemp() has become a trivial wrapper around git_mkdtemp(). Remove
this now unnecessary layer of indirection.
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Handle OpenBSD and NetBSD as FreeBSD / DragonFly are. OpenBSD would
need _XOPEN_SOURCE to be set to 700. Its simpler to just not set
_XOPEN_SOURCE.
CC strbuf.o
strbuf.c:645:6: warning: call to undeclared function 'getdelim'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
r = getdelim(&sb->buf, &sb->alloc, term, fp);
^
1 warning generated.
Signed-off-by: Brad Smith <brad@comstyle.com>
Reviewed-by: Collin Funk <collin.funk1@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The "git-compat-util.h" header is a treasure trove of various bits and
pieces used throughout the project. It basically mixes two different
things into one:
- Providing a POSIX-like interface even on platforms that aren't
POSIX-compliant.
- Providing low-level functionality that is specific to Git.
This intermixing is a bit of a problem for the reftable library as we
don't want to recreate the POSIX-like interface there. But neither do we
want to pull in the Git-specific functionality, as it is otherwise quite
easy to start depending on the Git codebase again.
Split out a new header "compat/posix.h" that only contains the bits and
pieces relevant for the emulation of POSIX, which we will start using in
the next commit.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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