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win32: ensure that localtime_r() is declared even in i686 builds#2157

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dscho:Fix-i686-build-with-GCC-v14
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win32: ensure that localtime_r() is declared even in i686 builds#2157
dscho wants to merge 1 commit into
gitgitgadget:masterfrom
dscho:Fix-i686-build-with-GCC-v14

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@dscho

@dscho dscho commented Jun 22, 2026

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Git for Windows plans on reducing the scope of its i686 support after v2.55.0 even further, therefore this patch (which I had forgotten about) needs to be in that version.

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>
@dscho dscho self-assigned this Jun 22, 2026
@dscho

dscho commented Jun 22, 2026

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/submit

@gitgitgadget

gitgitgadget Bot commented Jun 22, 2026

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Submitted as pull.2157.git.1782117847057.gitgitgadget@gmail.com

To fetch this version into FETCH_HEAD:

git fetch https://github.com/gitgitgadget/git/ pr-2157/dscho/Fix-i686-build-with-GCC-v14-v1

To fetch this version to local tag pr-2157/dscho/Fix-i686-build-with-GCC-v14-v1:

git fetch --no-tags https://github.com/gitgitgadget/git/ tag pr-2157/dscho/Fix-i686-build-with-GCC-v14-v1

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