libcamera: Add option to configure udev support

libcamera uses udev to support hotplug (and unplug) detection. This is an optional feature, which gets selected automatically if udev is available. Users may however want to build libcamera without hotplug detection, even if udev is available on the system. Add a new feature option to control udev support. The default value is auto, which retains the existing behaviour. Signed-off-by: Laurent Pinchart <[email protected]> Reviewed-by: Umang Jain <[email protected]> Reviewed-by: Kieran Bingham <[email protected]>
Ataman · Jul 7, 2023 · d314d3b · d314d3b
1 parent ca437b4
commit d314d3b
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Showing 3 changed files with 7 additions and 1 deletion.
diff --git a/meson.build b/meson.build
@@ -261,6 +261,7 @@ py_mod.find_installation('python3', modules : py_modules)
 summary({
             'Enabled pipelines': pipelines,
             'Enabled IPA modules': enabled_ipa_names,
+            'Hotplug support': libudev.found(),
             'Tracing support': tracing_enabled,
             'Android support': android_enabled,
             'GStreamer support': gst_enabled,

diff --git a/meson_options.txt b/meson_options.txt
@@ -66,6 +66,11 @@ option('tracing',
         value : 'auto',
         description : 'Enable tracing (based on lttng)')
 
+option('udev',
+       type : 'feature',
+       value : 'auto',
+       description : 'Enable udev support for hotplug')
+
 option('v4l2',
         type : 'boolean',
         value : false,

diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build
@@ -76,7 +76,7 @@ libdl = null_dep
 if not cc.has_function('dlopen')
     libdl = cc.find_library('dl')
 endif
-libudev = dependency('libudev', required : false)
+libudev = dependency('libudev', required : get_option('udev'))
 libyaml = dependency('yaml-0.1', required : false)
 
 # Use one of gnutls or libcrypto (provided by OpenSSL), trying gnutls first.