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feat(clock): support chrono Time Zone extensions.

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Use chrono Calendars and Time Zones (P0355R7, P1466R3) when available
instead of the `date` library.
Verified with a patched build of a recent GCC 13 snapshot.
This commit is contained in:
Aleksei Bavshin
2023-01-16 17:30:06 -08:00
parent 6225db0a48
commit 93e340a081
5 changed files with 45 additions and 11 deletions
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22
meson.build
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@ -123,11 +123,18 @@ gtk_layer_shell = dependency('gtk-layer-shell-0',
required: get_option('gtk-layer-shell'),
fallback : ['gtk-layer-shell', 'gtk_layer_shell_dep'])
systemd = dependency('systemd', required: get_option('systemd'))
tz_dep = dependency('date',
required: false,
default_options : [ 'use_system_tzdb=true' ],
modules : [ 'date::date', 'date::date-tz' ],
fallback: [ 'date', 'tz_dep' ])
cpp_lib_chrono = compiler.compute_int('__cpp_lib_chrono', prefix : '#include <chrono>')
have_chrono_timezones = cpp_lib_chrono >= 201907
if have_chrono_timezones
tz_dep = declare_dependency()
else
tz_dep = dependency('date',
required: false,
default_options : [ 'use_system_tzdb=true' ],
modules : [ 'date::date', 'date::date-tz' ],
fallback: [ 'date', 'tz_dep' ])
endif
prefix = get_option('prefix')
sysconfdir = get_option('sysconfdir')
@ -312,7 +319,10 @@ if get_option('rfkill').enabled() and is_linux
)
endif
if tz_dep.found()
if have_chrono_timezones
add_project_arguments('-DHAVE_CHRONO_TIMEZONES', language: 'cpp')
src_files += 'src/modules/clock.cpp'
elif tz_dep.found()
add_project_arguments('-DHAVE_LIBDATE', language: 'cpp')
src_files += 'src/modules/clock.cpp'
else