diff --git a/xcode/agg/agg.xcodeproj/project.pbxproj b/xcode/agg/agg.xcodeproj/project.pbxproj
index 4675799852..1d92005357 100644
--- a/xcode/agg/agg.xcodeproj/project.pbxproj
+++ b/xcode/agg/agg.xcodeproj/project.pbxproj
@@ -140,8 +140,9 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
+		34F558621DBF440C00A4FC11 /* common-debug.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = "common-debug.xcconfig"; path = "../common-debug.xcconfig"; sourceTree = "<group>"; };
+		34F558631DBF440C00A4FC11 /* common-release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = "common-release.xcconfig"; path = "../common-release.xcconfig"; sourceTree = "<group>"; };
 		67E8DB841BBC19810053C5BA /* libagg.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libagg.a; sourceTree = BUILT_PRODUCTS_DIR; };
-		67E8DB8B1BBC19AC0053C5BA /* defaults.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = defaults.xcconfig; path = ../defaults.xcconfig; sourceTree = "<group>"; };
 		67E8DB8D1BBC1A2A0053C5BA /* agg_alpha_mask_u8.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = agg_alpha_mask_u8.h; sourceTree = "<group>"; };
 		67E8DB8E1BBC1A2A0053C5BA /* agg_arc.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = agg_arc.h; sourceTree = "<group>"; };
 		67E8DB8F1BBC1A2A0053C5BA /* agg_array.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = agg_array.h; sourceTree = "<group>"; };
@@ -288,7 +289,8 @@
 		67E8DB7B1BBC19810053C5BA = {
 			isa = PBXGroup;
 			children = (
-				67E8DB8B1BBC19AC0053C5BA /* defaults.xcconfig */,
+				34F558621DBF440C00A4FC11 /* common-debug.xcconfig */,
+				34F558631DBF440C00A4FC11 /* common-release.xcconfig */,
 				67E8DB8C1BBC19E00053C5BA /* agg */,
 				67E8DB851BBC19810053C5BA /* Products */,
 			);
@@ -644,84 +646,15 @@
 /* Begin XCBuildConfiguration section */
 		67E8DB861BBC19810053C5BA /* Debug */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = 67E8DB8B1BBC19AC0053C5BA /* defaults.xcconfig */;
+			baseConfigurationReference = 34F558621DBF440C00A4FC11 /* common-debug.xcconfig */;
 			buildSettings = {
-				ALWAYS_SEARCH_USER_PATHS = NO;
-				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
-				CLANG_CXX_LIBRARY = "libc++";
-				CLANG_ENABLE_MODULES = YES;
-				CLANG_ENABLE_OBJC_ARC = YES;
-				CLANG_WARN_BOOL_CONVERSION = YES;
-				CLANG_WARN_CONSTANT_CONVERSION = YES;
-				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
-				CLANG_WARN_EMPTY_BODY = YES;
-				CLANG_WARN_ENUM_CONVERSION = YES;
-				CLANG_WARN_INT_CONVERSION = YES;
-				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
-				CLANG_WARN_UNREACHABLE_CODE = YES;
-				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
-				COPY_PHASE_STRIP = NO;
-				DEBUG_INFORMATION_FORMAT = dwarf;
-				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
-				GCC_C_LANGUAGE_STANDARD = gnu99;
-				GCC_DYNAMIC_NO_PIC = NO;
-				GCC_NO_COMMON_BLOCKS = YES;
-				GCC_OPTIMIZATION_LEVEL = 0;
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					"DEBUG=1",
-					"$(inherited)",
-				);
-				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
-				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
-				GCC_WARN_UNDECLARED_SELECTOR = YES;
-				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
-				GCC_WARN_UNUSED_FUNCTION = YES;
-				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MTL_ENABLE_DEBUG_INFO = YES;
-				ONLY_ACTIVE_ARCH = YES;
-				SDKROOT = macosx;
-				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos macosx";
-				WARNING_CFLAGS = "-Wno-deprecated-register";
 			};
 			name = Debug;
 		};
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 			isa = XCBuildConfiguration;
-			baseConfigurationReference = 67E8DB8B1BBC19AC0053C5BA /* defaults.xcconfig */;
+			baseConfigurationReference = 34F558631DBF440C00A4FC11 /* common-release.xcconfig */;
 			buildSettings = {
-				ALWAYS_SEARCH_USER_PATHS = NO;
-				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
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-				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
-				CLANG_WARN_EMPTY_BODY = YES;
-				CLANG_WARN_ENUM_CONVERSION = YES;
-				CLANG_WARN_INT_CONVERSION = YES;
-				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
-				CLANG_WARN_UNREACHABLE_CODE = YES;
-				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
-				COPY_PHASE_STRIP = NO;
-				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
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-				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				GCC_C_LANGUAGE_STANDARD = gnu99;
-				GCC_NO_COMMON_BLOCKS = YES;
-				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
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-				GCC_WARN_UNDECLARED_SELECTOR = YES;
-				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
-				GCC_WARN_UNUSED_FUNCTION = YES;
-				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.10;
-				MTL_ENABLE_DEBUG_INFO = NO;
-				SDKROOT = macosx;
-				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos macosx";
-				WARNING_CFLAGS = "-Wno-deprecated-register";
 			};
 			name = Release;
 		};