Bug 904831 - Part a: Support MSVC_ENABLE_PGO in moz.build; r=gps

python/mozbuild/mozbuild/frontend/emitter.py

@@ -134,6 +134,7 @@ class TreeMetadataEmitter(LoggingMixin):
             LIBS='LIBS',
             LIBXUL_LIBRARY='LIBXUL_LIBRARY',
             MODULE='MODULE',
+            MSVC_ENABLE_PGO='MSVC_ENABLE_PGO',
             SDK_LIBRARY='SDK_LIBRARY',
             SHARED_LIBRARY_LIBS='SHARED_LIBRARY_LIBS',
             SIMPLE_PROGRAMS='SIMPLE_PROGRAMS',

python/mozbuild/mozbuild/frontend/sandbox_symbols.py

@@ -215,6 +215,10 @@ VARIABLES = {
         Implies MOZILLA_INTERNAL_API.
         """),
 
+    'MSVC_ENABLE_PGO': (bool, bool, False,
+        """Whether profile-guided optimization is enabled in this directory.
+        """),
+
     'SDK_LIBRARY': (StrictOrderingOnAppendList, list, [],
         """Elements of the distributed SDK.
 

python/mozbuild/mozbuild/test/backend/data/variable_passthru/moz.build

@@ -42,3 +42,4 @@ SSRCS = ['bar.S', 'foo.S']
 
 FAIL_ON_WARNINGS = True
 LIBXUL_LIBRARY = True
+MSVC_ENABLE_PGO = True

python/mozbuild/mozbuild/test/backend/test_recursivemake.py

@@ -207,6 +207,9 @@ class TestRecursiveMakeBackend(BackendTester):
             'LIBXUL_LIBRARY': [
                 'LIBXUL_LIBRARY := 1',
             ],
+            'MSVC_ENABLE_PGO': [
+                'MSVC_ENABLE_PGO := 1',
+            ],
             'SDK_LIBRARY': [
                 'SDK_LIBRARY += bar.sdk',
                 'SDK_LIBRARY += foo.sdk',

python/mozbuild/mozbuild/test/frontend/data/variable-passthru/moz.build

@@ -42,5 +42,6 @@ SSRCS = ['fans.S', 'tans.S']
 
 FAIL_ON_WARNINGS = True
 LIBXUL_LIBRARY = True
+MSVC_ENABLE_PGO = True
 
 NO_DIST_INSTALL = True

python/mozbuild/mozbuild/test/frontend/test_emitter.py

@@ -146,6 +146,7 @@ class TestEmitterBasic(unittest.TestCase):
             LIBRARY_NAME='lib_name',
             LIBS=['fans.lib', 'tans.lib'],
             LIBXUL_LIBRARY=True,
+            MSVC_ENABLE_PGO=True,
             NO_DIST_INSTALL='1',
             MODULE='module_name',
             SDK_LIBRARY=['fans.sdk', 'tans.sdk'],