bug 1485946 - skip building libprio on MSVC r=froydnj

libprio does not currently build with MSVC (since it only supports
C90 as a compiler), this is being worked on upstream at https://github.com/mozilla/libprio/issues/17

As we are almost certainly not going to ship Firefox build with MSVC anymore,
let's disable this to get it working on this Tier-2 platform.

Differential Revision: https://phabricator.services.mozilla.com/D4292

--HG--
extra : moz-landing-system : lando

config/external/moz.build

@@ -8,12 +8,16 @@ external_dirs = []
 
 DIRS += [
     'lgpllibs',
-    'prio',
     'sqlite',
 ]
 if not CONFIG['MOZ_SYSTEM_JPEG']:
     external_dirs += ['media/libjpeg']
 
+if CONFIG['MOZ_LIBPRIO']:
+    DIRS += [
+        'prio',
+    ]
+
 # There's no "native" brotli or woff2 yet, but probably in the future...
 external_dirs += ['modules/brotli']
 external_dirs += ['modules/woff2']

config/external/msgpack/moz.build

@@ -4,5 +4,6 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-DIRS += ['/third_party/msgpack']
+if CONFIG['MOZ_LIBPRIO']:
+    DIRS += ['/third_party/msgpack']
 

config/external/prio/moz.build

@@ -4,5 +4,5 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-DIRS += ['../../../third_party/prio']
+DIRS += ['/third_party/prio']
 

dom/bindings/moz.build

@@ -95,9 +95,11 @@ LOCAL_INCLUDES += [
     '/media/webrtc/signaling/src/common/time_profiling',
     '/media/webrtc/signaling/src/peerconnection',
     '/media/webrtc/trunk/',
-    '/third_party/msgpack/include',
 ]
 
+if CONFIG['MOZ_LIBPRIO']:
+    LOCAL_INCLUDES += ['/third_party/msgpack/include']
+
 DEFINES['GOOGLE_PROTOBUF_NO_RTTI'] = True
 DEFINES['GOOGLE_PROTOBUF_NO_STATIC_INITIALIZER'] = True
 

dom/chrome-webidl/moz.build

@@ -44,7 +44,6 @@ WEBIDL_FILES = [
     'MozStorageStatementParams.webidl',
     'MozStorageStatementRow.webidl',
     'PrecompiledScript.webidl',
-    'PrioEncoder.webidl',
     'PromiseDebugging.webidl',
     'StructuredCloneHolder.webidl',
     'WebExtensionContentScript.webidl',
@@ -58,3 +57,9 @@ if CONFIG['MOZ_PLACES']:
         'PlacesEvent.webidl',
         'PlacesObservers.webidl',
     ]
+
+if CONFIG['MOZ_LIBPRIO']:
+    WEBIDL_FILES += [
+        'PrioEncoder.webidl',
+    ]
+

dom/moz.build

@@ -63,7 +63,6 @@ DIRS += [
     'notification',
     'offline',
     'power',
-    'prio',
     'push',
     'quota',
     'security',
@@ -105,6 +104,9 @@ DIRS += [
     'simpledb',
 ]
 
+if CONFIG['MOZ_LIBPRIO']:
+    DIRS += ['prio']
+
 if CONFIG['OS_ARCH'] == 'WINNT':
     DIRS += ['plugins/ipc/hangui']
 

third_party/moz.build

@@ -10,8 +10,9 @@ with Files('rust/**'):
 with Files('webkit/**'):
     BUG_COMPONENT = ('Firefox Build System', 'General')
 
-with Files('prio/**'):
-    BUG_COMPONENT = ('Firefox Build System', 'General')
+if CONFIG['MOZ_LIBPRIO']:
+    with Files('prio/**'):
+        BUG_COMPONENT = ('Firefox Build System', 'General')
 
-with Files('msgpack/**'):
-    BUG_COMPONENT = ('Firefox Build System', 'General')
+    with Files('msgpack/**'):
+        BUG_COMPONENT = ('Firefox Build System', 'General')

toolkit/moz.configure

@@ -1064,3 +1064,16 @@ def launcher(value, target):
 
 set_config('MOZ_LAUNCHER_PROCESS', launcher)
 set_define('MOZ_LAUNCHER_PROCESS', launcher)
+
+# Prio
+# ==============================================================
+@depends(c_compiler)
+def libprio(info):
+    if info:
+      if info.type in ('msvc'):
+        return None
+    else:
+      return True
+
+set_config('MOZ_LIBPRIO', libprio)
+