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Define _POSIX_C_SOURCE globally

Other Sway projects have switched to this approach.

build: use cc.get_supported_arguments() for warnings

Let's not require the C compiler to support specific warnings,
especially if half the flags are used to turn off the warnings
anyways.

Other Sway projects have switched to this approach.
Let's not require the C compiler to support specific warnings,
especially if half the flags are used to turn off the warnings
anyways.
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@kennylevinsen kennylevinsen left a comment

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LGTM

@kennylevinsen kennylevinsen merged commit f18bc29 into master Mar 18, 2025
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@kennylevinsen kennylevinsen deleted the posix-c-source branch March 18, 2025 21:31
@landryb
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landryb commented Apr 15, 2025

fwiw, on OpenBSD i had to revert this/drop the define from meson.build, as having POSIX_SOURCE defined disables __BSD_VISIBLE, which hides the explicit_bzero() definition used in #325.

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#325 is not merged.

bob-beck pushed a commit to openbsd/ports that referenced this pull request Apr 15, 2025
see https://github.com/swaywm/swaylock/releases/tag/v1.8.1
and https://github.com/swaywm/swaylock/releases/tag/v1.8.2

drop -D_POSIX_C_SOURCE=200809L from CFLAGS as it disables __BSD_VISIBLE
which hides explicit_bzero().

cf swaywm/swaylock#402
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landryb commented Apr 15, 2025

#325 is not merged.

i know, it stalled. I'm just saying that this PR creates issues with it :)

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kennylevinsen commented Apr 15, 2025

which hides the explicit_bzero() definition used in #325.

The OpenBSD backend should use password_buffer_destroy to align with the existing backends, which would solve the issue. When an exception is needed, the file can just undef _POSIX_C_SOURCE.

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landryb commented Apr 15, 2025

@kennylevinsen thanks, that also works. I'll try to unstall #325 someday..

sthen pushed a commit to sthen/ports that referenced this pull request Apr 16, 2025
see https://github.com/swaywm/swaylock/releases/tag/v1.8.1
and https://github.com/swaywm/swaylock/releases/tag/v1.8.2

drop -D_POSIX_C_SOURCE=200809L from CFLAGS as it disables __BSD_VISIBLE
which hides explicit_bzero().

cf swaywm/swaylock#402
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3 participants