build: drop xwayland option

Instead of having a build-time option to enable/disable xwayland
support, just use the wlroots build config: enable xwayland in
Sway if it was enabled when building wlroots. I don't see any
use-case for disabling xwayland in Sway when enabled in wlroots:
Sway doesn't pull in any additional dependency (just pulls in
dependencies that wlroots already needs). We have a config command
to disable xwayland at runtime anyways.

This makes it so xwayland behaves the same way as other features
such as libinput backend and session support. This also reduces
the build matrix (less combinations of build options).

I think we originally introduced the xwayland option when we didn't
have a good way to figure out the wlroots build config from the
Sway build system.

1 files changed, 2 insertions, 10 deletions

diff --git a/meson.build b/meson.build
index 1d143110..3c444e07 100644
--- a/meson.build
+++ b/meson.build
@@ -57,10 +57,6 @@ foreach name, _ : wlroots_features
         wlroots_features += { name: have }
 endforeach
 
-if get_option('xwayland').enabled() and not wlroots_features['xwayland']
-        error('Cannot enable Xwayland in sway: wlroots has been built without Xwayland support')
-endif
-
 null_dep = dependency('', required: false)
 
 jsonc = dependency('json-c', version: '>=0.13')
@@ -77,16 +73,14 @@ gdk_pixbuf = dependency('gdk-pixbuf-2.0', required: get_option('gdk-pixbuf'))
 pixman = dependency('pixman-1')
 libevdev = dependency('libevdev')
 libinput = wlroots_features['libinput_backend'] ? dependency('libinput', version: '>=1.21.0') : null_dep
-xcb = dependency('xcb', required: get_option('xwayland'))
+xcb = wlroots_features['xwayland'] ? dependency('xcb') : null_dep
 drm = dependency('libdrm')
 libudev = wlroots_features['libinput_backend'] ? dependency('libudev') : null_dep
 math = cc.find_library('m')
 rt = cc.find_library('rt')
-xcb_icccm = dependency('xcb-icccm', required: get_option('xwayland'))
+xcb_icccm = wlroots_features['xwayland'] ? dependency('xcb-icccm') : null_dep
 threads = dependency('threads') # for pthread_setschedparam
 
-have_xwayland = xcb.found() and xcb_icccm.found() and wlroots_features['xwayland']
-
 if get_option('sd-bus-provider') == 'auto'
         if not get_option('tray').disabled()
                 assert(get_option('auto_features').auto(), 'sd-bus-provider must not be set to auto since auto_features != auto')
@@ -110,7 +104,6 @@ have_tray = (not get_option('tray').disabled()) and tray_deps_found
 
 conf_data = configuration_data()
 
-conf_data.set10('HAVE_XWAYLAND', have_xwayland)
 conf_data.set10('HAVE_GDK_PIXBUF', gdk_pixbuf.found())
 conf_data.set10('HAVE_LIBSYSTEMD', sdbus.found() and sdbus.name() == 'libsystemd')
 conf_data.set10('HAVE_LIBELOGIND', sdbus.found() and sdbus.name() == 'libelogind')
@@ -271,7 +264,6 @@ endif
 subdir('completions')
 
 summary({
-        'xwayland': have_xwayland,
         'gdk-pixbuf': gdk_pixbuf.found(),
         'tray': have_tray,
         'man-pages': scdoc.found(),