use round(3) and ceilf(3) from the math library

ΔSLOC: -1

try to limit (79 characters) the line lenght in the Makefile

Updated power management handling to address issues raised in the PR

Implement support for output power management

This patch is based on the original stale patch by Guido Cella @guidocella.
It has been modified to apply cleanly to the latest v5.0 tag. Since the SLOC
limit is now lifted, this core feature should be merged into dwl upstream.

Thanks to Dima Krasner @dimkr for the cherry-pick.

Closes: #559, #525

minor adjustments in Makefile

Support pointer constraints and relative pointer protocols

Fixes: https://codeberg.org/dwl/dwl/issues/489
FIxes: https://codeberg.org/dwl/dwl/issues/317

turn on -Wfloat-conversion

turn on -Wsign-compare

include CHANGELOG.md in the tarball

Fixes: 24576f1fdf56bc8879203bb2d7e7cd116d4bba42

Merge branch 'wlroots-next'

enable debug symbols by default

they does not affect performance and the size's increase is negligible

Merge remote-tracking branch 'upstream/main' into wlroots-next

include dwl.desktop in the tarbal

Merge remote-tracking branch 'upstream/main' into wlroots-next

allow specify DATADIR (to install desktop file)

Add desktop entry file

add support for cursor-shape-v1

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4106

Merge remote-tracking branch 'upstream/main' into wlroots-next

convert some warnings to errors

Merge remote-tracking branch 'djpohly/main' into wlroots-next