From 8f04dad2c059ec642f82cc4b848ec461756bf8d2 Mon Sep 17 00:00:00 2001
From: "Jan Alexander Steffens (heftig)" <heftig@archlinux.org>
Date: Wed, 13 Apr 2022 15:59:56 +0000
Subject: [PATCH] meson: Define HAVE_PULSE_MESSAGING_API when available

To match the autotools build.
---
 meson.build     |  8 ++++++++
 src/meson.build | 12 ++++++++++--
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/meson.build b/meson.build
index 15acb6c..0d72ca1 100644
--- a/meson.build
+++ b/meson.build
@@ -6,6 +6,8 @@ project('pavucontrol', 'cpp',
 
 with_lynx = get_option('lynx')
 
+cpp = meson.get_compiler('cpp')
+
 gtkmm_dep = dependency('gtkmm-3.0', version : '>= 3.0', required : true)
 sigcpp_dep = dependency('sigc++-2.0', required : true)
 canberragtk_dep = dependency('libcanberra-gtk3', version : '>= 0.16', required : true)
@@ -13,6 +15,12 @@ canberragtk_dep = dependency('libcanberra-gtk3', version : '>= 0.16', required :
 libpulse_dep = dependency('libpulse', version : '>= 5.0', required : true)
 libpulsemlglib_dep = dependency('libpulse-mainloop-glib', version : '>= 0.9.16', required : true)
 
+have_pulse_messaging_api = cpp.has_function('pa_context_send_message_to_object',
+  dependencies: [libpulse_dep],
+)
+
+json_glib_dep = dependency('json-glib-1.0', required : have_pulse_messaging_api)
+
 lynx = find_program('lynx', required: with_lynx)
 tidy = find_program('tidy', required: false)
 
diff --git a/src/meson.build b/src/meson.build
index fa2abf4..d480475 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -14,12 +14,20 @@ pavucontrol_sources = [
   'streamwidget.cc',
 ]
 
+pavucontrol_deps = [gtkmm_dep, sigcpp_dep, canberragtk_dep, libpulse_dep, libpulsemlglib_dep]
+pavucontrol_defines = ['-DHAVE_CONFIG_H']
+
+if have_pulse_messaging_api
+  pavucontrol_deps += [json_glib_dep]
+  pavucontrol_defines += ['-DHAVE_PULSE_MESSAGING_API']
+endif
+
 executable('pavucontrol',
   pavucontrol_sources,
   install: true,
-  cpp_args: ['-DHAVE_CONFIG_H'],
+  cpp_args: pavucontrol_defines,
   include_directories : configinc,
-  dependencies : [gtkmm_dep, sigcpp_dep, canberragtk_dep, libpulse_dep, libpulsemlglib_dep],
+  dependencies : pavucontrol_deps,
 )
 
 install_data('pavucontrol.glade')