apple: build static library

Move build rules from src/output/plugins/meson.build

meson.build

@@ -319,6 +319,8 @@ subdir('src/thread')
 subdir('src/net')
 subdir('src/event')
 
+subdir('src/apple')
+
 subdir('src/lib/dbus')
 subdir('src/lib/icu')
 subdir('src/lib/smbclient')

src/apple/meson.build

@@ -0,0 +1,27 @@
+if not is_darwin
+  apple_dep = dependency('', required: false)
+  subdir_done()
+endif
+
+audiounit_dep = declare_dependency(
+  link_args: ['-framework', 'AudioUnit', '-framework', 'CoreAudio', '-framework', 'CoreServices'],
+  dependencies: [
+    boost_dep,
+  ],
+)
+
+apple = static_library(
+  'apple',
+  'Throw.cxx',
+  include_directories: inc,
+  dependencies: [
+    audiounit_dep,
+  ],
+)
+
+apple_dep = declare_dependency(
+  link_with: apple,
+  dependencies: [
+    audiounit_dep,
+  ],
+)

src/output/plugins/meson.build

@@ -74,18 +74,7 @@ endif
 if is_darwin
   output_plugins_sources += [
     'OSXOutputPlugin.cxx',
-    '../../apple/Throw.cxx',
   ]
-  audiounit_dep = declare_dependency(
-    link_args: [
-      '-framework', 'AudioUnit', '-framework', 'CoreAudio', '-framework', 'CoreServices',
-    ],
-    dependencies: [
-      boost_dep,
-    ],
-  )
-else
-  audiounit_dep = dependency('', required: false)
 endif
 conf.set('HAVE_OSX', is_darwin)
 
@@ -148,7 +137,7 @@ output_plugins = static_library(
   include_directories: inc,
   dependencies: [
     alsa_dep,
-    audiounit_dep,
+    apple_dep,
     libao_dep,
     libjack_dep,
     pulse_dep,