diff --git a/objectivec/ProtocolBuffers_OSX.xcodeproj/project.pbxproj b/objectivec/ProtocolBuffers_OSX.xcodeproj/project.pbxproj
index 6b34b9b..a41be9f 100644
--- a/objectivec/ProtocolBuffers_OSX.xcodeproj/project.pbxproj
+++ b/objectivec/ProtocolBuffers_OSX.xcodeproj/project.pbxproj
@@ -7,7 +7,6 @@
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@@ -24,10 +23,8 @@
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@@ -40,6 +37,31 @@
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+		F40EE4AC206BF8B90071091A /* GPBCompileTest02.m in Sources */ = {isa = PBXBuildFile; fileRef = F40EE481206BF8AE0071091A /* GPBCompileTest02.m */; };
+		F40EE4AD206BF8B90071091A /* GPBCompileTest03.m in Sources */ = {isa = PBXBuildFile; fileRef = F40EE491206BF8B10071091A /* GPBCompileTest03.m */; };
+		F40EE4AE206BF8B90071091A /* GPBCompileTest04.m in Sources */ = {isa = PBXBuildFile; fileRef = F40EE47E206BF8AE0071091A /* GPBCompileTest04.m */; };
+		F40EE4AF206BF8B90071091A /* GPBCompileTest05.m in Sources */ = {isa = PBXBuildFile; fileRef = F40EE47F206BF8AE0071091A /* GPBCompileTest05.m */; };
+		F40EE4B0206BF8B90071091A /* GPBCompileTest06.m in Sources */ = {isa = PBXBuildFile; fileRef = F40EE492206BF8B10071091A /* GPBCompileTest06.m */; };
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+		F40EE4C1206BF8B90071091A /* GPBCompileTest23.m in Sources */ = {isa = PBXBuildFile; fileRef = F40EE487206BF8B00071091A /* GPBCompileTest23.m */; };
+		F40EE50B206C06640071091A /* GPBCompileTest24.m in Sources */ = {isa = PBXBuildFile; fileRef = F40EE508206C06440071091A /* GPBCompileTest24.m */; };
+		F40EE50C206C06640071091A /* GPBCompileTest25.m in Sources */ = {isa = PBXBuildFile; fileRef = F40EE507206C06440071091A /* GPBCompileTest25.m */; };
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@@ -55,9 +77,13 @@
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+		F47476E61D21A524007C7B1A /* Timestamp.pbobjc.m in Sources */ = {isa = PBXBuildFile; fileRef = 8B4248D61A92826400BC1EC6 /* Timestamp.pbobjc.m */; };
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@@ -66,14 +92,7 @@
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@@ -140,10 +159,8 @@
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@@ -162,11 +179,35 @@
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+		F40EE47D206BF8AD0071091A /* GPBCompileTest08.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBCompileTest08.m; sourceTree = "<group>"; };
+		F40EE47E206BF8AE0071091A /* GPBCompileTest04.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBCompileTest04.m; sourceTree = "<group>"; };
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+		F40EE481206BF8AE0071091A /* GPBCompileTest02.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBCompileTest02.m; sourceTree = "<group>"; };
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+		F40EE483206BF8AF0071091A /* GPBCompileTest13.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBCompileTest13.m; sourceTree = "<group>"; };
+		F40EE484206BF8AF0071091A /* GPBCompileTest09.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBCompileTest09.m; sourceTree = "<group>"; };
+		F40EE485206BF8AF0071091A /* GPBCompileTest20.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBCompileTest20.m; sourceTree = "<group>"; };
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+		F40EE490206BF8B10071091A /* GPBCompileTest12.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBCompileTest12.m; sourceTree = "<group>"; };
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+		F40EE508206C06440071091A /* GPBCompileTest24.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBCompileTest24.m; sourceTree = "<group>"; };
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@@ -188,7 +229,9 @@
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 		F4487C7E1AAF62CD00531423 /* GPBMessageTests+Serialization.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "GPBMessageTests+Serialization.m"; sourceTree = "<group>"; };
 		F4487C821AAF6AB300531423 /* GPBMessageTests+Merge.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "GPBMessageTests+Merge.m"; sourceTree = "<group>"; };
+		F44929001C866B1900C2548A /* GPBCodedOutputStream_PackagePrivate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = GPBCodedOutputStream_PackagePrivate.h; sourceTree = "<group>"; };
 		F451D3F51A8AAE8700B8A22C /* GPBProtocolBuffers_RuntimeSupport.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GPBProtocolBuffers_RuntimeSupport.h; sourceTree = "<group>"; };
+		F4584D7E1ECCB38900803AB6 /* GPBExtensionRegistryTest.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBExtensionRegistryTest.m; sourceTree = "<group>"; };
 		F45C69CB16DFD08D0081955B /* GPBExtensionInternals.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBExtensionInternals.m; sourceTree = "<group>"; };
 		F45E57C61AE6DC6A000B7D99 /* text_format_map_unittest_data.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = text_format_map_unittest_data.txt; sourceTree = "<group>"; };
 		F4AC9E1D1A8BEB3500BD6E83 /* unittest_cycle.proto */ = {isa = PBXFileReference; lastKnownFileType = text; path = unittest_cycle.proto; sourceTree = "<group>"; };
@@ -197,6 +240,7 @@
 		F4B6B8B21A9CCBDA00892426 /* GPBUnknownFieldSet_PackagePrivate.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GPBUnknownFieldSet_PackagePrivate.h; sourceTree = "<group>"; };
 		F4B6B8B61A9CD1DE00892426 /* GPBExtensionInternals.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GPBExtensionInternals.h; sourceTree = "<group>"; };
 		F4B6B8B81A9CD1DE00892426 /* GPBRootObject_PackagePrivate.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GPBRootObject_PackagePrivate.h; sourceTree = "<group>"; };
+		F4C4B9E21E1D974F00D3B61D /* GPBDictionaryTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBDictionaryTests.m; sourceTree = "<group>"; };
 		F4CF31701B162ED800BD9B06 /* unittest_objc_startup.proto */ = {isa = PBXFileReference; lastKnownFileType = text; path = unittest_objc_startup.proto; sourceTree = "<group>"; };
 		F4E675861B21D0000054530B /* Any.pbobjc.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = Any.pbobjc.h; path = google/protobuf/Any.pbobjc.h; sourceTree = "<group>"; };
 		F4E675871B21D0000054530B /* Any.pbobjc.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = Any.pbobjc.m; path = google/protobuf/Any.pbobjc.m; sourceTree = "<group>"; };
@@ -222,6 +266,7 @@
 		F4E675AB1B21D05C0054530B /* struct.proto */ = {isa = PBXFileReference; lastKnownFileType = text; name = struct.proto; path = ../src/google/protobuf/struct.proto; sourceTree = "<group>"; };
 		F4E675AC1B21D05C0054530B /* type.proto */ = {isa = PBXFileReference; lastKnownFileType = text; name = type.proto; path = ../src/google/protobuf/type.proto; sourceTree = "<group>"; };
 		F4E675AD1B21D05C0054530B /* wrappers.proto */ = {isa = PBXFileReference; lastKnownFileType = text; name = wrappers.proto; path = ../src/google/protobuf/wrappers.proto; sourceTree = "<group>"; };
+		F4F8D8811D789FCE002CE128 /* GPBUnittestProtos2.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GPBUnittestProtos2.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -299,9 +344,6 @@
 				F4E675881B21D0000054530B /* Api.pbobjc.h */,
 				F4E675891B21D0000054530B /* Api.pbobjc.m */,
 				F4E675A71B21D05C0054530B /* api.proto */,
-				8B54585814DCC34E003D7338 /* Descriptor.pbobjc.h */,
-				8BD3982214BE5B0C0081D629 /* Descriptor.pbobjc.m */,
-				8B42494B1A92A16600BC1EC6 /* descriptor.proto */,
 				8B4248D31A92826400BC1EC6 /* Duration.pbobjc.h */,
 				8B4248D41A92826400BC1EC6 /* Duration.pbobjc.m */,
 				8B42494C1A92A16600BC1EC6 /* duration.proto */,
@@ -368,9 +410,10 @@
 		7461B4860F94F96B00A0C422 /* IO */ = {
 			isa = PBXGroup;
 			children = (
-				7461B48E0F94F99000A0C422 /* GPBCodedInputStream.h */,
 				51457B5F18D0B7AF00CCC606 /* GPBCodedInputStream_PackagePrivate.h */,
+				7461B48E0F94F99000A0C422 /* GPBCodedInputStream.h */,
 				7461B48F0F94F99000A0C422 /* GPBCodedInputStream.m */,
+				F44929001C866B1900C2548A /* GPBCodedOutputStream_PackagePrivate.h */,
 				7461B4900F94F99000A0C422 /* GPBCodedOutputStream.h */,
 				7461B4910F94F99000A0C422 /* GPBCodedOutputStream.m */,
 				7461B4E70F94F99000A0C422 /* GPBWireFormat.h */,
@@ -402,8 +445,34 @@
 				F401DC321A8E5C0200FCC765 /* GPBArrayTests.m */,
 				7461B69B0F94FDF800A0C422 /* GPBCodedInputStreamTests.m */,
 				7461B69D0F94FDF800A0C422 /* GPBCodedOuputStreamTests.m */,
+				F40EE488206BF8B00071091A /* GPBCompileTest01.m */,
+				F40EE481206BF8AE0071091A /* GPBCompileTest02.m */,
+				F40EE491206BF8B10071091A /* GPBCompileTest03.m */,
+				F40EE47E206BF8AE0071091A /* GPBCompileTest04.m */,
+				F40EE47F206BF8AE0071091A /* GPBCompileTest05.m */,
+				F40EE492206BF8B10071091A /* GPBCompileTest06.m */,
+				F40EE480206BF8AE0071091A /* GPBCompileTest07.m */,
+				F40EE47D206BF8AD0071091A /* GPBCompileTest08.m */,
+				F40EE484206BF8AF0071091A /* GPBCompileTest09.m */,
+				F40EE48C206BF8B00071091A /* GPBCompileTest10.m */,
+				F40EE493206BF8B20071091A /* GPBCompileTest11.m */,
+				F40EE490206BF8B10071091A /* GPBCompileTest12.m */,
+				F40EE483206BF8AF0071091A /* GPBCompileTest13.m */,
+				F40EE48F206BF8B10071091A /* GPBCompileTest14.m */,
+				F40EE489206BF8B00071091A /* GPBCompileTest15.m */,
+				F40EE48B206BF8B00071091A /* GPBCompileTest16.m */,
+				F40EE48D206BF8B00071091A /* GPBCompileTest17.m */,
+				F40EE48E206BF8B10071091A /* GPBCompileTest18.m */,
+				F40EE482206BF8AF0071091A /* GPBCompileTest19.m */,
+				F40EE485206BF8AF0071091A /* GPBCompileTest20.m */,
+				F40EE486206BF8AF0071091A /* GPBCompileTest21.m */,
+				F40EE48A206BF8B00071091A /* GPBCompileTest22.m */,
+				F40EE487206BF8B00071091A /* GPBCompileTest23.m */,
+				F40EE508206C06440071091A /* GPBCompileTest24.m */,
+				F40EE507206C06440071091A /* GPBCompileTest25.m */,
 				5102DABB1891A052002037B6 /* GPBConcurrencyTests.m */,
 				F4353D1C1AB8822D005A6198 /* GPBDescriptorTests.m */,
+				F4C4B9E21E1D974F00D3B61D /* GPBDictionaryTests.m */,
 				F4353D2C1AC06F10005A6198 /* GPBDictionaryTests.pddm */,
 				F4353D2D1AC06F10005A6198 /* GPBDictionaryTests+Bool.m */,
 				F4353D2E1AC06F10005A6198 /* GPBDictionaryTests+Int32.m */,
@@ -411,6 +480,7 @@
 				F4353D301AC06F10005A6198 /* GPBDictionaryTests+String.m */,
 				F4353D311AC06F10005A6198 /* GPBDictionaryTests+UInt32.m */,
 				F4353D321AC06F10005A6198 /* GPBDictionaryTests+UInt64.m */,
+				F4584D7E1ECCB38900803AB6 /* GPBExtensionRegistryTest.m */,
 				7461B6A30F94FDF800A0C422 /* GPBMessageTests.m */,
 				F4487C821AAF6AB300531423 /* GPBMessageTests+Merge.m */,
 				F4487C741AADF7F500531423 /* GPBMessageTests+Runtime.m */,
@@ -421,12 +491,13 @@
 				7461B6AB0F94FDF800A0C422 /* GPBTestUtilities.h */,
 				7461B6AC0F94FDF800A0C422 /* GPBTestUtilities.m */,
 				8BD3981E14BE59D70081D629 /* GPBUnittestProtos.m */,
+				F4F8D8811D789FCE002CE128 /* GPBUnittestProtos2.m */,
 				7461B6B80F94FDF900A0C422 /* GPBUnknownFieldSetTest.m */,
 				7461B6BA0F94FDF900A0C422 /* GPBUtilitiesTests.m */,
 				8B4248DB1A92933A00BC1EC6 /* GPBWellKnownTypesTest.m */,
 				7461B6BC0F94FDF900A0C422 /* GPBWireFormatTests.m */,
-				F43C88CF191D77FC009E917D /* text_format_unittest_data.txt */,
 				F45E57C61AE6DC6A000B7D99 /* text_format_map_unittest_data.txt */,
+				F43C88CF191D77FC009E917D /* text_format_unittest_data.txt */,
 				8B7E6A7414893DBA00F8884A /* unittest_custom_options.proto */,
 				F4AC9E1D1A8BEB3500BD6E83 /* unittest_cycle.proto */,
 				8B7E6A7514893DBA00F8884A /* unittest_embed_optimize_for.proto */,
@@ -436,8 +507,8 @@
 				8BBD9DB016DD1DC8008E1EC1 /* unittest_lite.proto */,
 				8B7E6A7B14893DBC00F8884A /* unittest_mset.proto */,
 				8B7E6A7C14893DBC00F8884A /* unittest_no_generic_services.proto */,
-				8B09AAF614B663A7007B4184 /* unittest_objc.proto */,
 				F4CF31701B162ED800BD9B06 /* unittest_objc_startup.proto */,
+				8B09AAF614B663A7007B4184 /* unittest_objc.proto */,
 				8B7E6A7D14893DBC00F8884A /* unittest_optimize_for.proto */,
 				F4487C781AADFB3100531423 /* unittest_runtime_proto2.proto */,
 				F4487C791AADFB3200531423 /* unittest_runtime_proto3.proto */,
@@ -566,9 +637,10 @@
 			attributes = {
 				LastSwiftUpdateCheck = 0710;
 				LastTestingUpgradeCheck = 0600;
-				LastUpgradeCheck = 0710;
+				LastUpgradeCheck = 0930;
 				TargetAttributes = {
 					8BBEA4A5147C727100C4ADB7 = {
+						LastSwiftMigration = 0800;
 						TestTargetID = 8B9A5EA41831993600A9D33B;
 					};
 					F45BBC141B0CE3C6002D064D = {
@@ -632,7 +704,6 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				2CFB390415C718CE00CBF84D /* Descriptor.pbobjc.m in Sources */,
 				7461B53C0F94FB4E00A0C422 /* GPBCodedInputStream.m in Sources */,
 				F4E6759B1B21D0000054530B /* Empty.pbobjc.m in Sources */,
 				7461B53D0F94FB4E00A0C422 /* GPBCodedOutputStream.m in Sources */,
@@ -641,6 +712,7 @@
 				F4E6759D1B21D0000054530B /* FieldMask.pbobjc.m in Sources */,
 				7461B54C0F94FB4E00A0C422 /* GPBUnknownField.m in Sources */,
 				7461B5530F94FB4E00A0C422 /* GPBMessage.m in Sources */,
+				F47476E51D21A524007C7B1A /* Duration.pbobjc.m in Sources */,
 				7461B5610F94FB4E00A0C422 /* GPBUnknownFieldSet.m in Sources */,
 				7461B5630F94FB4E00A0C422 /* GPBUtilities.m in Sources */,
 				7461B5640F94FB4E00A0C422 /* GPBWireFormat.m in Sources */,
@@ -655,6 +727,7 @@
 				F4E675A31B21D0000054530B /* Type.pbobjc.m in Sources */,
 				F4E675A11B21D0000054530B /* Struct.pbobjc.m in Sources */,
 				F4E675A51B21D0000054530B /* Wrappers.pbobjc.m in Sources */,
+				F47476E61D21A524007C7B1A /* Timestamp.pbobjc.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -663,40 +736,58 @@
 			buildActionMask = 2147483647;
 			files = (
 				8BBEA4A9147C727D00C4ADB7 /* GPBCodedInputStreamTests.m in Sources */,
+				F40EE50B206C06640071091A /* GPBCompileTest24.m in Sources */,
+				F40EE4BE206BF8B90071091A /* GPBCompileTest20.m in Sources */,
 				F401DC331A8E5C0200FCC765 /* GPBArrayTests.m in Sources */,
+				F40EE4B4206BF8B90071091A /* GPBCompileTest10.m in Sources */,
 				F4353D361AC06F10005A6198 /* GPBDictionaryTests+Int64.m in Sources */,
+				F40EE4C0206BF8B90071091A /* GPBCompileTest22.m in Sources */,
+				F40EE4B2206BF8B90071091A /* GPBCompileTest08.m in Sources */,
+				F40EE4BB206BF8B90071091A /* GPBCompileTest17.m in Sources */,
 				F4353D391AC06F10005A6198 /* GPBDictionaryTests+UInt64.m in Sources */,
 				8BBEA4AA147C727D00C4ADB7 /* GPBCodedOuputStreamTests.m in Sources */,
-				F4E675B21B21D0A70054530B /* SourceContext.pbobjc.m in Sources */,
+				F40EE4C1206BF8B90071091A /* GPBCompileTest23.m in Sources */,
 				8BBEA4AC147C727D00C4ADB7 /* GPBMessageTests.m in Sources */,
 				F4B51B1E1BBC610700744318 /* GPBObjectiveCPlusPlusTest.mm in Sources */,
+				F40EE4BD206BF8B90071091A /* GPBCompileTest19.m in Sources */,
+				F40EE4B0206BF8B90071091A /* GPBCompileTest06.m in Sources */,
+				F40EE4B6206BF8B90071091A /* GPBCompileTest12.m in Sources */,
 				F4487C7F1AAF62CD00531423 /* GPBMessageTests+Serialization.m in Sources */,
+				F40EE4AD206BF8B90071091A /* GPBCompileTest03.m in Sources */,
+				F40EE4BC206BF8B90071091A /* GPBCompileTest18.m in Sources */,
+				F40EE4B7206BF8B90071091A /* GPBCompileTest13.m in Sources */,
+				F40EE4B9206BF8B90071091A /* GPBCompileTest15.m in Sources */,
+				F40EE4B1206BF8B90071091A /* GPBCompileTest07.m in Sources */,
 				8B4248DC1A92933A00BC1EC6 /* GPBWellKnownTypesTest.m in Sources */,
-				F4E675B01B21D0A70054530B /* Empty.pbobjc.m in Sources */,
-				F4E675B41B21D0A70054530B /* Type.pbobjc.m in Sources */,
+				F40EE4BF206BF8B90071091A /* GPBCompileTest21.m in Sources */,
+				F40EE4B5206BF8B90071091A /* GPBCompileTest11.m in Sources */,
+				F4F8D8831D789FD9002CE128 /* GPBUnittestProtos2.m in Sources */,
 				F4353D1D1AB8822D005A6198 /* GPBDescriptorTests.m in Sources */,
-				F4E675B51B21D0A70054530B /* Wrappers.pbobjc.m in Sources */,
-				F4E675AE1B21D0A70054530B /* Any.pbobjc.m in Sources */,
 				8B4248BB1A8C256A00BC1EC6 /* GPBSwiftTests.swift in Sources */,
+				F40EE50C206C06640071091A /* GPBCompileTest25.m in Sources */,
+				F4584D821ECCB52A00803AB6 /* GPBExtensionRegistryTest.m in Sources */,
 				5102DABC1891A073002037B6 /* GPBConcurrencyTests.m in Sources */,
-				F4E675B31B21D0A70054530B /* Struct.pbobjc.m in Sources */,
 				F4487C751AADF7F500531423 /* GPBMessageTests+Runtime.m in Sources */,
+				F40EE4AC206BF8B90071091A /* GPBCompileTest02.m in Sources */,
 				F4353D351AC06F10005A6198 /* GPBDictionaryTests+Int32.m in Sources */,
+				F40EE4AF206BF8B90071091A /* GPBCompileTest05.m in Sources */,
+				F40EE4B8206BF8B90071091A /* GPBCompileTest14.m in Sources */,
 				8BBEA4B0147C727D00C4ADB7 /* GPBTestUtilities.m in Sources */,
+				F40EE4AE206BF8B90071091A /* GPBCompileTest04.m in Sources */,
+				F40EE4BA206BF8B90071091A /* GPBCompileTest16.m in Sources */,
 				F41C175D1833D3310064ED4D /* GPBPerfTests.m in Sources */,
 				F4353D341AC06F10005A6198 /* GPBDictionaryTests+Bool.m in Sources */,
 				F4487C831AAF6AB300531423 /* GPBMessageTests+Merge.m in Sources */,
+				F40EE4AB206BF8B90071091A /* GPBCompileTest01.m in Sources */,
 				8BBEA4B6147C727D00C4ADB7 /* GPBUnknownFieldSetTest.m in Sources */,
 				F4353D371AC06F10005A6198 /* GPBDictionaryTests+String.m in Sources */,
 				F4353D381AC06F10005A6198 /* GPBDictionaryTests+UInt32.m in Sources */,
+				F40EE4B3206BF8B90071091A /* GPBCompileTest09.m in Sources */,
 				8BBEA4B7147C727D00C4ADB7 /* GPBUtilitiesTests.m in Sources */,
+				F4C4B9E41E1D976300D3B61D /* GPBDictionaryTests.m in Sources */,
 				8BBEA4B8147C727D00C4ADB7 /* GPBWireFormatTests.m in Sources */,
-				8B79657D14992E3F002FFBFC /* GPBRootObject.m in Sources */,
 				8BD3981F14BE59D70081D629 /* GPBUnittestProtos.m in Sources */,
-				F4E675B11B21D0A70054530B /* FieldMask.pbobjc.m in Sources */,
-				8B96157514CA019D00A2AC0B /* Descriptor.pbobjc.m in Sources */,
 				8B8B615D17DF7056002EE618 /* GPBARCUnittestProtos.m in Sources */,
-				F4E675AF1B21D0A70054530B /* Api.pbobjc.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -727,6 +818,7 @@
 		7461B52F0F94FAFA00A0C422 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				CLANG_ENABLE_OBJC_WEAK = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				HEADER_SEARCH_PATHS = "$(SRCROOT)";
 				PRODUCT_NAME = ProtocolBuffers;
@@ -736,6 +828,7 @@
 		7461B5300F94FAFA00A0C422 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				CLANG_ENABLE_OBJC_WEAK = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				HEADER_SEARCH_PATHS = "$(SRCROOT)";
 				PRODUCT_NAME = ProtocolBuffers;
@@ -746,6 +839,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				HEADER_SEARCH_PATHS = (
 					"${PROJECT_DERIVED_FILE_DIR}/protos",
@@ -753,10 +847,18 @@
 				);
 				INFOPLIST_FILE = "Tests/UnitTests-Info.plist";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
+				OTHER_LDFLAGS = "-ObjC";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.yourcompany.${PRODUCT_NAME:identifier}";
 				PRODUCT_NAME = UnitTests;
 				SWIFT_OBJC_BRIDGING_HEADER = "Tests/UnitTests-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 3.0;
+				WARNING_CFLAGS = (
+					"$(inherited)",
+					"-Wno-documentation-unknown-command",
+					"-Wno-reserved-id-macro",
+					"-Wno-direct-ivar-access",
+				);
 			};
 			name = Debug;
 		};
@@ -764,6 +866,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				HEADER_SEARCH_PATHS = (
 					"${PROJECT_DERIVED_FILE_DIR}/protos",
@@ -771,9 +874,17 @@
 				);
 				INFOPLIST_FILE = "Tests/UnitTests-Info.plist";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
+				OTHER_LDFLAGS = "-ObjC";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.yourcompany.${PRODUCT_NAME:identifier}";
 				PRODUCT_NAME = UnitTests;
 				SWIFT_OBJC_BRIDGING_HEADER = "Tests/UnitTests-Bridging-Header.h";
+				SWIFT_VERSION = 3.0;
+				WARNING_CFLAGS = (
+					"$(inherited)",
+					"-Wno-documentation-unknown-command",
+					"-Wno-reserved-id-macro",
+					"-Wno-direct-ivar-access",
+				);
 			};
 			name = Release;
 		};
@@ -781,18 +892,33 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = YES;
+				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_SECURITY_FLOATLOOPCOUNTER = YES;
 				CLANG_ANALYZER_SECURITY_INSECUREAPI_RAND = YES;
 				CLANG_ANALYZER_SECURITY_INSECUREAPI_STRCPY = YES;
 				CLANG_STATIC_ANALYZER_MODE = deep;
+				CLANG_WARN_ASSIGN_ENUM = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_NULLABLE_TO_NONNULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_EXPLICIT_OWNERSHIP_TYPE = YES;
 				CLANG_WARN_OBJC_IMPLICIT_ATOMIC_PROPERTIES = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_MISSING_PROPERTY_SYNTHESIS = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_IMPLICIT_CONVERSION = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES_AGGRESSIVE;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
 				GCC_C_LANGUAGE_STANDARD = c99;
+				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_PREPROCESSOR_DEFINITIONS = "DEBUG=1";
 				GCC_TREAT_IMPLICIT_FUNCTION_DECLARATIONS_AS_ERRORS = YES;
@@ -810,6 +936,7 @@
 				GCC_WARN_SHADOW = YES;
 				GCC_WARN_SIGN_COMPARE = YES;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNKNOWN_PRAGMAS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_LABEL = YES;
@@ -820,6 +947,14 @@
 				ONLY_ACTIVE_ARCH = YES;
 				RUN_CLANG_STATIC_ANALYZER = YES;
 				SDKROOT = macosx;
+				WARNING_CFLAGS = (
+					"-Wdocumentation-unknown-command",
+					"-Wundef",
+					"-Wreserved-id-macro",
+					"-Wswitch-enum",
+					"-Wdirect-ivar-access",
+					"-Woverriding-method-mismatch",
+				);
 			};
 			name = Debug;
 		};
@@ -827,18 +962,33 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = YES;
+				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_SECURITY_FLOATLOOPCOUNTER = YES;
 				CLANG_ANALYZER_SECURITY_INSECUREAPI_RAND = YES;
 				CLANG_ANALYZER_SECURITY_INSECUREAPI_STRCPY = YES;
 				CLANG_STATIC_ANALYZER_MODE = deep;
+				CLANG_WARN_ASSIGN_ENUM = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_NULLABLE_TO_NONNULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_EXPLICIT_OWNERSHIP_TYPE = YES;
 				CLANG_WARN_OBJC_IMPLICIT_ATOMIC_PROPERTIES = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_MISSING_PROPERTY_SYNTHESIS = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_IMPLICIT_CONVERSION = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES_AGGRESSIVE;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				GCC_C_LANGUAGE_STANDARD = c99;
+				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_TREAT_IMPLICIT_FUNCTION_DECLARATIONS_AS_ERRORS = YES;
 				GCC_TREAT_INCOMPATIBLE_POINTER_TYPE_WARNINGS_AS_ERRORS = YES;
 				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
@@ -854,6 +1004,7 @@
 				GCC_WARN_SHADOW = YES;
 				GCC_WARN_SIGN_COMPARE = YES;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNKNOWN_PRAGMAS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_LABEL = YES;
@@ -863,12 +1014,22 @@
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
 				RUN_CLANG_STATIC_ANALYZER = YES;
 				SDKROOT = macosx;
+				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				WARNING_CFLAGS = (
+					"-Wdocumentation-unknown-command",
+					"-Wundef",
+					"-Wreserved-id-macro",
+					"-Wswitch-enum",
+					"-Wdirect-ivar-access",
+					"-Woverriding-method-mismatch",
+				);
 			};
 			name = Release;
 		};
 		F4487C4F1A9F8E0200531423 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				CLANG_ENABLE_OBJC_WEAK = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				HEADER_SEARCH_PATHS = "$(SRCROOT)";
 				PRODUCT_NAME = TestSingleSourceBuild;
@@ -878,6 +1039,7 @@
 		F4487C501A9F8E0200531423 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				CLANG_ENABLE_OBJC_WEAK = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				HEADER_SEARCH_PATHS = "$(SRCROOT)";
 				PRODUCT_NAME = TestSingleSourceBuild;
@@ -887,12 +1049,14 @@
 		F45BBC151B0CE3C6002D064D /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				CLANG_ENABLE_OBJC_WEAK = YES;
 			};
 			name = Debug;
 		};
 		F45BBC161B0CE3C6002D064D /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				CLANG_ENABLE_OBJC_WEAK = YES;
 			};
 			name = Release;
 		};