Index: ObjFW.xcodeproj/project.pbxproj
==================================================================
--- ObjFW.xcodeproj/project.pbxproj
+++ ObjFW.xcodeproj/project.pbxproj
@@ -205,10 +205,13 @@
 		4BB50DD012F863C700C9393F /* of_asprintf.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = of_asprintf.m; path = src/of_asprintf.m; sourceTree = SOURCE_ROOT; };
 		4BBA36C411406AB700CBA3AC /* atomic.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = atomic.h; path = src/atomic.h; sourceTree = "<group>"; };
 		4BBA36C511406AB700CBA3AC /* macros.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = macros.h; path = src/macros.h; sourceTree = "<group>"; };
 		4BD86D801237A6C600ED9912 /* OFBlock.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = OFBlock.h; path = src/OFBlock.h; sourceTree = SOURCE_ROOT; };
 		4BD86D811237A6C600ED9912 /* OFBlock.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = OFBlock.m; path = src/OFBlock.m; sourceTree = SOURCE_ROOT; };
+		4BE17AD812FD744C002CEB0B /* foundation-compat.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = "foundation-compat.m"; path = "src/foundation-compat.m"; sourceTree = SOURCE_ROOT; };
+		4BE17AD912FD746D002CEB0B /* OFDataArray+Hashing.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = "OFDataArray+Hashing.h"; path = "src/OFDataArray+Hashing.h"; sourceTree = SOURCE_ROOT; };
+		4BE17ADA12FD746D002CEB0B /* OFDataArray+Hashing.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = "OFDataArray+Hashing.m"; path = "src/OFDataArray+Hashing.m"; sourceTree = SOURCE_ROOT; };
 		4BE5F0D712DF4225005C7A0C /* OFConstantString.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = OFConstantString.h; path = src/OFConstantString.h; sourceTree = SOURCE_ROOT; };
 		4BE5F0D812DF4225005C7A0C /* OFConstantString.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = OFConstantString.m; path = src/OFConstantString.m; sourceTree = SOURCE_ROOT; };
 		4BE5F0D912DF4225005C7A0C /* OFDate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = OFDate.h; path = src/OFDate.h; sourceTree = SOURCE_ROOT; };
 		4BE5F0DA12DF4225005C7A0C /* OFDate.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = OFDate.m; path = src/OFDate.m; sourceTree = SOURCE_ROOT; };
 		4BE5F0E412DF4259005C7A0C /* OFBlockTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = OFBlockTests.m; path = tests/OFBlockTests.m; sourceTree = SOURCE_ROOT; };
@@ -258,10 +261,12 @@
 				4BAF5F46123460C900F4E111 /* OFCollection.h */,
 				4BE5F0D712DF4225005C7A0C /* OFConstantString.h */,
 				4BE5F0D812DF4225005C7A0C /* OFConstantString.m */,
 				4B6799601099E7C50041064A /* OFDataArray.h */,
 				4B6799611099E7C50041064A /* OFDataArray.m */,
+				4BE17AD912FD746D002CEB0B /* OFDataArray+Hashing.h */,
+				4BE17ADA12FD746D002CEB0B /* OFDataArray+Hashing.m */,
 				4BE5F0D912DF4225005C7A0C /* OFDate.h */,
 				4BE5F0DA12DF4225005C7A0C /* OFDate.m */,
 				4B6799621099E7C50041064A /* OFDictionary.h */,
 				4B6799631099E7C50041064A /* OFDictionary.m */,
 				4B0108C910EB8C9300631877 /* OFEnumerator.h */,
@@ -325,10 +330,11 @@
 				4B6AF97310A8D4450003FB0A /* ObjFW.h */,
 				4B6799561099E7C50041064A /* asprintf.h */,
 				4B6AF96C10A8D3E40003FB0A /* asprintf.m */,
 				4BBA36C411406AB700CBA3AC /* atomic.h */,
 				4B6AF96F10A8D40E0003FB0A /* iso_8859_15.m */,
+				4BE17AD812FD744C002CEB0B /* foundation-compat.m */,
 				4BBA36C511406AB700CBA3AC /* macros.h */,
 				4B4986DF1101F64500A2CFDA /* objc_properties.m */,
 				4B6799581099E7C50041064A /* objc_sync.m */,
 				4BF1BCBF11C9663F0025511F /* objfw-defs.h.in */,
 				4BB50DCF12F863C700C9393F /* of_asprintf.h */,