build/meson: Add XRT_HAVE_DBUS when dbus is found

meson.build

@@ -69,6 +69,7 @@ libuvc   = dependency('libuvc', required: false)
 vulkan   = dependency('vulkan', required: true)
 zlib     = dependency('zlib', required: false)
 survive  = dependency('survive', required: false)
+dbus     = dependency('dbus-1', required: get_option('dbus'))
 
 opencv = dependency('opencv4', required: false)
 if not opencv.found()

meson_options.txt

@@ -67,6 +67,11 @@ option('wayland',
 	value: 'auto',
 	description: 'Enable support for Wayland rendering.')
 
+option('dbus',
+	type: 'feature',
+	value: 'auto',
+	description: 'Enable support for dbus.')
+
 option('service',
 	type: 'boolean',
 	value: true,

src/xrt/auxiliary/meson.build

@@ -91,15 +91,28 @@ if build_opengl or build_opengles
 	)
 endif
 
+aux_os_files = files(
+	'os/os_documentation.h',
+	'os/os_hid.h',
+	'os/os_hid_hidraw.c',
+	'os/os_threading.h',
+	'os/os_time.h',
+	'os/os_ble.h',
+)
+
+aux_os_deps = []
+
+if dbus.found() and not get_option('dbus').disabled()
+	aux_os_files += files(
+		'os/os_ble_dbus.c'
+	)
+	aux_os_deps += dbus
+endif
+
 lib_aux_os = static_library(
 	'aux_os',
-	files(
+	aux_os_files,
-		'os/os_documentation.h',
+	dependencies: aux_os_deps,
-		'os/os_hid.h',
-		'os/os_hid_hidraw.c',
-		'os/os_threading.h',
-		'os/os_time.h',
-	),
 	include_directories: xrt_include,
 )
 

src/xrt/include/xrt/meson.build

@@ -73,6 +73,10 @@ if true
 	have_conf.set('XRT_HAVE_VULKAN', true)	
 endif
 
+if dbus.found() and not get_option('dbus').disabled()
+	have_conf.set('XRT_HAVE_DBUS', true)
+endif
+
 if get_option('layer_depth')
 	have_conf.set('XRT_FEATURE_OPENXR_LAYER_DEPTH', true)
 endif