[gnome-control-center] build: Make bluetooth, network and wacom mandatory on linux

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit a2b20a65cb8519abaac891b1a060f6f4a1c0d422
Author: Iñigo Martínez <inigomartinez gmail com>
Date:   Thu Jan 18 16:17:08 2018 +0100

    build: Make bluetooth, network and wacom mandatory on linux
    
    The bluetooh, network and wacom panels should not be optional
    on linux, except on s390 systems which lack USB support. It
    should also not be built at all on other systems.
    
    This patch makes these panels mandatory on linux.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=792641

 meson.build              |   78 ++++++++++++++++++++++------------------------
 meson_options.txt        |    5 +--
 panels/meson.build       |   16 +++------
 panels/power/meson.build |    8 +---
 shell/meson.build        |    2 +-
 5 files changed, 47 insertions(+), 62 deletions(-)
---
diff --git a/meson.build b/meson.build
index f47ec34..cd3e9c0 100644
--- a/meson.build
+++ b/meson.build
@@ -19,6 +19,7 @@ control_center_icondir = join_paths(control_center_datadir, 'icons')
 
 control_center_gettext = meson.project_name() + '-2.0'
 
+host_is_linux = host_machine.system().contains('linux')
 host_is_s390 = host_machine.cpu().contains('s390')
 
 cc = meson.get_compiler('c')
@@ -144,18 +145,6 @@ foreach header: check_headers
   assert(cc.has_header(header[1], args: cups_cflags), 'CUPS headers not found: ' + header[1])
 endforeach
 
-# Check for gnome-bluetooth
-enable_bluetooth = get_option('bluetooth')
-if enable_bluetooth
-  assert(not host_is_s390, 'Bluetooth panel will not be built (no USB support on this platform). Use 
-Dbluetooth=false to build without it.')
-
-  gnome_bluetooth_dep = dependency('gnome-bluetooth-1.0', version: '>= 3.18.2')
-endif
-config_h.set('BUILD_BLUETOOTH', enable_bluetooth,
-             description: 'Define to 1 to build the Bluetooth panel')
-config_h.set('HAVE_BLUETOOTH', enable_bluetooth,
-             description: 'Define to 1 if bluetooth support is available')
-
 # Optional dependency for the user accounts panel
 enable_cheese = get_option('cheese')
 if enable_cheese
@@ -178,9 +167,27 @@ endif
 config_h.set('HAVE_IBUS', enable_ibus,
              description: 'Defined if IBus support is enabled')
 
-# network manager
-enable_network_manager = get_option('network_manager')
-if enable_network_manager
+# wayland
+enable_wayland = get_option('wayland')
+if enable_wayland
+  wayland_deps = [
+    dependency('gdk-wayland-3.0'),
+    dependency('gudev-1.0')
+  ]
+endif
+config_h.set('HAVE_WAYLAND', enable_wayland,
+             description: 'Define to 1 if Wayland is enabled')
+
+if host_is_s390
+  message('Bluetooth, Network and Wacom panels will not be built (no USB support on this platform)')
+endif
+
+enable_linux = host_is_linux and not host_is_s390
+if enable_linux
+  # gnome-bluetooth
+  gnome_bluetooth_dep = dependency('gnome-bluetooth-1.0', version: '>= 3.18.2')
+
+  # network manager
   network_manager_deps = [
     dependency('libnm', version: '>= 1.2.0'),
     dependency('libnma', version: '>= 1.2.0'),
@@ -190,17 +197,9 @@ if enable_network_manager
   network_manager_dep = dependency('NetworkManager')
   nm_vpn_config_dir = join_paths(network_manager_dep.get_pkgconfig_variable('configdir'), 'VPN')
   nm_vpn_module_dir = network_manager_dep.get_pkgconfig_variable('plugindir')
-endif
-config_h.set('BUILD_NETWORK', enable_network_manager,
-             description: 'Define to 1 to build the Network panel')
-config_h.set('HAVE_NETWORK_MANAGER', enable_network_manager,
-             description: 'Define to 1 if NetworkManager is available')
 
-# Wacom
-enable_wacom = get_option('wacom')
-if enable_wacom
-  assert(not host_is_s390, 'Wacom panel will not be built (no USB support on this platform). Use 
-Dwacom=false to build without it.')
-  assert(clutter_gtk_dep.found(), 'wacom support requested, but clutter-gtk library is not available. Use 
-Dwacom=false to build without it.')
+  # Wacom
+  assert(clutter_gtk_dep.found(), 'clutter-gtk library is required for wacom support, but is not available.')
 
   wacom_deps = [
     clutter_gtk_dep,
@@ -208,22 +207,19 @@ if enable_wacom
     dependency('libwacom', version: '>= 0.7')
   ]
 endif
-config_h.set('BUILD_WACOM', enable_wacom,
+config_h.set('BUILD_BLUETOOTH', enable_linux,
+             description: 'Define to 1 to build the Bluetooth panel')
+config_h.set('HAVE_BLUETOOTH', enable_linux,
+             description: 'Define to 1 if bluetooth support is available')
+config_h.set('BUILD_NETWORK', enable_linux,
+             description: 'Define to 1 to build the Network panel')
+config_h.set('HAVE_NETWORK_MANAGER', enable_linux,
+             description: 'Define to 1 if NetworkManager is available')
+config_h.set('BUILD_WACOM', enable_linux,
              description: 'Define to 1 to build the Wacom panel')
-config_h.set('HAVE_WACOM', enable_wacom,
+config_h.set('HAVE_WACOM', enable_linux,
              description: 'Define to 1 if Wacom is supportted')
 
-# wayland
-enable_wayland = get_option('wayland')
-if enable_wayland
-  wayland_deps = [
-    dependency('gdk-wayland-3.0'),
-    dependency('gudev-1.0')
-  ]
-endif
-config_h.set('HAVE_WAYLAND', enable_wayland,
-             description: 'Define to 1 if Wayland is enabled')
-
 # Check for info panel
 gnome_session_libexecdir = get_option('gnome_session_libexecdir')
 if gnome_session_libexecdir == ''
@@ -272,11 +268,11 @@ meson.add_install_script(
 )
 
 output = meson.project_name() + ' was configured with the following options:\n'
-output += '** gnome-bluetooth (Bluetooth panel): ' + enable_bluetooth.to_string() + '\n'
+output += '** gnome-bluetooth (Bluetooth panel): ' + enable_linux.to_string() + '\n'
 output += '** Cheese (Users panel webcam support): ' + enable_cheese.to_string() + '\n'
 output += '** IBus (Region panel IBus support): ' + enable_ibus.to_string() + '\n'
-output += '** NetworkManager (Network panel): ' + enable_network_manager.to_string() + '\n'
-output += '** wacom (Wacom tablet panel): ' + enable_wacom.to_string() + '\n'
+output += '** NetworkManager (Network panel): ' + enable_linux.to_string() + '\n'
+output += '** wacom (Wacom tablet panel): ' + enable_linux.to_string() + '\n'
 output += '** Wayland: ' + enable_wayland.to_string() + '\n'
 output += '** gnome-session libexecdir: ' + gnome_session_libexecdir + '\n'
 output += 'End options'
diff --git a/meson_options.txt b/meson_options.txt
index 9cd9d88..7498af4 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,8 +1,5 @@
-option('bluetooth', type: 'boolean', value: true, description: 'build with Bluetooth support')
 option('cheese', type: 'boolean', value: true, description: 'build with cheese webcam support')
 option('documentation', type: 'boolean', value: false, description: 'build documentation')
 option('gnome_session_libexecdir', type: 'string', value: '', description: 'Directory for gnome-session\'s 
libexecdir')
 option('ibus', type: 'boolean', value: true, description: 'build with IBus support')
-option('network_manager', type: 'boolean', value: true, description: 'build with NetworkManager support')
-option('wacom', type: 'boolean', value: true, description: 'build with Wacom support')
-option('wayland', type: 'boolean', value: true, description: 'build with Wayland support')
\ No newline at end of file
+option('wayland', type: 'boolean', value: true, description: 'build with Wayland support')
diff --git a/panels/meson.build b/panels/meson.build
index d027147..0489809 100644
--- a/panels/meson.build
+++ b/panels/meson.build
@@ -21,16 +21,12 @@ panels = [
   'user-accounts'
 ]
 
-if enable_bluetooth
-  panels += 'bluetooth'
-endif
-
-if enable_network_manager
-  panels += 'network'
-endif
-
-if enable_wacom
-  panels += 'wacom'
+if enable_linux
+  panels += [
+    'bluetooth',
+    'network',
+    'wacom'
+  ]
 endif
 
 panels_list = []
diff --git a/panels/power/meson.build b/panels/power/meson.build
index 4262fa9..da9b6d1 100644
--- a/panels/power/meson.build
+++ b/panels/power/meson.build
@@ -35,12 +35,8 @@ deps = common_deps + [
 
 cflags += '-DGNOMELOCALEDIR="@0@"'.format(control_center_localedir)
 
-if enable_bluetooth
-  deps += gnome_bluetooth_dep
-endif
-
-if enable_network_manager
-  deps += network_manager_deps
+if enable_linux
+  deps += network_manager_deps + [gnome_bluetooth_dep]
 endif
 
 panels_libs += static_library(
diff --git a/shell/meson.build b/shell/meson.build
index 91dee5b..70ca2af 100644
--- a/shell/meson.build
+++ b/shell/meson.build
@@ -86,7 +86,7 @@ if enable_cheese
   shell_deps += cheese_deps
 endif
 
-if enable_wacom
+if enable_linux
   shell_deps += wacom_deps
 endif