build: Make network mandatory on every linux

In a recent commit[0], bluetooth, network and wacom panels were made
mandatory on every linux except on S390 systems. However, the
network panel should also be mandatory on S390 systems running
linux.

This changes the conditions to build bluetooh, network and wacom
panels.

https://bugzilla.gnome.org/show_bug.cgi?id=792641

[0] https://git.gnome.org/browse/gnome-control-center/commit/?id=a2b20a65c

meson.build

@@ -20,7 +20,7 @@ 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')
+host_is_linux_not_s390 = host_is_linux and not host_machine.cpu().contains('s390')
 
 cc = meson.get_compiler('c')
 
@@ -178,15 +178,7 @@ 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')
-
+if host_is_linux
   # network manager
   network_manager_deps = [
     dependency('libnm', version: '>= 1.2.0'),
@@ -197,6 +189,15 @@ if enable_linux
   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', host_is_linux,
+             description: 'Define to 1 to build the Network panel')
+config_h.set('HAVE_NETWORK_MANAGER', host_is_linux,
+             description: 'Define to 1 if NetworkManager is available')
+
+if host_is_linux_not_s390
+  # gnome-bluetooth
+  gnome_bluetooth_dep = dependency('gnome-bluetooth-1.0', version: '>= 3.18.2')
 
   # Wacom
   assert(clutter_gtk_dep.found(), 'clutter-gtk library is required for wacom support, but is not available.')
@@ -206,18 +207,16 @@ if enable_linux
     dependency('clutter-1.0', version: '>= 1.11.3'),
     dependency('libwacom', version: '>= 0.7')
   ]
+else
+  message('Bluetooth and Wacom panels will not be built (no USB support on this platform)')
 endif
-config_h.set('BUILD_BLUETOOTH', enable_linux,
+config_h.set('BUILD_BLUETOOTH', host_is_linux_not_s390,
              description: 'Define to 1 to build the Bluetooth panel')
-config_h.set('HAVE_BLUETOOTH', enable_linux,
+config_h.set('HAVE_BLUETOOTH', host_is_linux_not_s390,
              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,
+config_h.set('BUILD_WACOM', host_is_linux_not_s390,
              description: 'Define to 1 to build the Wacom panel')
-config_h.set('HAVE_WACOM', enable_linux,
+config_h.set('HAVE_WACOM', host_is_linux_not_s390,
              description: 'Define to 1 if Wacom is supportted')
 
 # Check for info panel
@@ -269,11 +268,11 @@ meson.add_install_script(
 )
 
 output = meson.project_name() + ' was configured with the following options:\n'
-output += '** gnome-bluetooth (Bluetooth panel): ' + enable_linux.to_string() + '\n'
+output += '** gnome-bluetooth (Bluetooth panel): ' + host_is_linux_not_s390.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_linux.to_string() + '\n'
-output += '** wacom (Wacom tablet panel): ' + enable_linux.to_string() + '\n'
+output += '** NetworkManager (Network panel): ' + host_is_linux.to_string() + '\n'
+output += '** wacom (Wacom tablet panel): ' + host_is_linux_not_s390.to_string() + '\n'
 output += '** Wayland: ' + enable_wayland.to_string() + '\n'
 output += '** gnome-session libexecdir: ' + gnome_session_libexecdir + '\n'
 output += 'End options'

panels/meson.build

@@ -21,10 +21,13 @@ panels = [
   'user-accounts'
 ]
 
-if enable_linux
+if host_is_linux
+  panels += ['network']
+endif
+
+if host_is_linux_not_s390
   panels += [
     'bluetooth',
-    'network',
     'wacom'
   ]
 endif

panels/power/meson.build

@@ -36,8 +36,12 @@ deps = common_deps + [
 
 cflags += '-DGNOMELOCALEDIR="@0@"'.format(control_center_localedir)
 
-if enable_linux
-  deps += network_manager_deps + [gnome_bluetooth_dep]
+if host_is_linux
+  deps += network_manager_deps
+endif
+
+if host_is_linux_not_s390
+  deps += gnome_bluetooth_dep
 endif
 
 panels_libs += static_library(

shell/meson.build

@@ -87,7 +87,7 @@ if enable_cheese
   shell_deps += cheese_deps
 endif
 
-if enable_linux
+if host_is_linux_not_s390
   shell_deps += wacom_deps
 endif