meson: make wpipc optional and disabled by default

This is only intended to be used with specific embedded
applications. There is no good reason to use it on
a standard desktop environment.

lib/wpipc/meson.build

@@ -1,3 +1,8 @@
+if get_option('wpipc').disabled()
+  wpipc_dep = disabler()
+  subdir_done()
+endif
+
 wpipc_lib_sources = files(
   'utils.c',
   'protocol.c',

meson_options.txt

@@ -19,3 +19,5 @@ option('systemd-system-unit-dir',
 option('systemd-user-unit-dir',
        type : 'string',
        description : 'Directory for user systemd units')
+option('wpipc', type : 'feature', value : 'disabled',
+       description: 'Build the wpipc library and module-ipc')

modules/meson.build

@@ -177,6 +177,7 @@ shared_library(
   dependencies : [wp_dep, pipewire_dep, mathlib],
 )
 
+if wpipc_dep.found()
   shared_library(
     'wireplumber-module-ipc',
     [
@@ -187,3 +188,4 @@ shared_library(
     install_dir : wireplumber_module_dir,
     dependencies : [wp_dep, pipewire_dep, wpipc_dep],
   )
+endif

tests/examples/meson.build

@@ -9,6 +9,7 @@ executable('audiotestsrc-play',
   dependencies : [giounix_dep, wp_dep, pipewire_dep],
 )
 
+if wpipc_dep.found()
   executable('wpipc-client',
     'wpipc-client.c',
     c_args : [
@@ -19,3 +20,4 @@ executable('wpipc-client',
     install: false,
     dependencies : [wpipc_dep],
   )
+endif

tests/meson.build

@@ -1,5 +1,5 @@
 subdir('wp')
 subdir('wplua')
-subdir('wpipc')
+subdir('wpipc', if_found: wpipc_dep)
 subdir('modules')
 subdir('examples')