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build: add explicit logind provider option, auto-detect by default

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Allow package maintainers to explicitly select a logind provider
by passing -Dlogind=systemd or -Dlogind=elogind. In case both are
available (e.g. for distributions which support both), this makes
it possible to gte deterministic behavior.

By default, auto-detect the logind provider. That way, users which
have systemd or elogind installed get the backend built by default.
This commit is contained in:
Simon Ser 2021-04-07 13:24:19 +02:00 • committed by Kenny Levinsen
parent 3ce4c57814
commit 385cc0039d
2 changed files with 14 additions and 10 deletions
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22
meson.build
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@ -109,13 +109,19 @@ endif
logind = disabler()
logind_provider = ''
if not get_option('logind').disabled()
foreach logind_provider : ['elogind', 'systemd']
logind = dependency('lib@0@'.format(logind_provider), required: false)
if logind.found()
break
endif
endforeach
if get_option('logind') != 'disabled'
if get_option('logind') == 'auto'
assert(get_option('auto_features').auto(), '-Dlogind must be set to systemd or elogind since auto_features != auto')
foreach logind_provider : ['elogind', 'systemd']
logind = dependency('lib@0@'.format(logind_provider), required: false)
if logind.found()
break
endif
endforeach
else
logind_provider = get_option('logind')
logind = dependency('lib@0@'.format(logind_provider))
endif
if logind.found()
add_project_arguments('-DLOGIND_ENABLED=1', language: 'c')
@ -125,8 +131,6 @@ if not get_option('logind').disabled()
'common/drm.c',
]
private_deps += logind
elif get_option('logind').enabled()
error('logind backend was enabled but no supported logind provider was found')
endif
endif