meson: Add support for libunwind

include/meson.build

@@ -233,6 +233,7 @@ conf_data.set('XvExtension', build_xv)
 conf_data.set('XvMCExtension', build_xvmc)
 
 conf_data.set('HAVE_SHA1_IN_' + sha1.to_upper(), '1', description: 'Use @0@ SHA1 functions'.format(sha1))
+conf_data.set('HAVE_LIBUNWIND', get_option('libunwind'))
 
 conf_data.set('HAVE_APM', build_apm or build_acpi)
 conf_data.set('HAVE_ACPI', build_acpi)

meson.build

@@ -639,6 +639,10 @@ if host_machine.system() == 'windows'
     common_dep += socket_dep
 endif
 
+if get_option('libunwind')
+    common_dep += dependency('libunwind', required: true)
+endif
+
 glx_inc = include_directories('glx')
 
 top_dir_inc = include_directories('.')

meson_options.txt

@@ -121,3 +121,6 @@ option('sparkle-feed-url', type: 'string',
         description: 'Feed URL for autoupdating with the Sparkle Framework (default: disabled)')
 option('xpbproxy', type: 'boolean', value: false,
         description: 'Build a standalone X pasteboard proxy')
+
+option('libunwind', type: 'boolean', value: false,
+        description: 'Use libunwind for backtrace reporting')