Bug 1452509 - Require Jack package for --enable-jack build. r=froydnj

MozReview-Commit-ID: HT3ZCrEAN8Y

--HG--
extra : rebase_source : 0fc577c097fcc390c79514019099680b3129c748

media/libcubeb/src/moz.build

@@ -88,6 +88,7 @@ if CONFIG['OS_TARGET'] == 'Android':
 FINAL_LIBRARY = 'gkmedias'
 
 CFLAGS += CONFIG['MOZ_ALSA_CFLAGS']
+CFLAGS += CONFIG['MOZ_JACK_CFLAGS']
 CFLAGS += CONFIG['MOZ_PULSEAUDIO_CFLAGS']
 
 # We allow warnings for third-party code that can be updated from upstream.

toolkit/moz.configure

@@ -60,13 +60,10 @@ imply_option('--enable-replace-malloc', dmd)
 option('--enable-jack', env='MOZ_JACK',
        help='Enable JACK audio backend.')
 
-@depends('--enable-jack')
-def jack(value):
-    if value:
-        return True
+jack = pkg_check_modules('MOZ_JACK', 'jack', when='--enable-jack')
 
-set_config('MOZ_JACK', jack)
-set_define('MOZ_JACK', jack)
+set_config('MOZ_JACK', depends_if(jack)(lambda _: True))
+set_define('MOZ_JACK', depends_if(jack)(lambda _: True))
 
 # Javascript engine
 # ==============================================================