update Xcode build preferences as recommended by XCode.

projects/mtg/wagic.xcodeproj/project.pbxproj

@@ -1704,7 +1704,7 @@
 		29B97313FDCFA39411CA2CEA /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0430;
+				LastUpgradeCheck = 0510;
 			};
 			buildConfigurationList = C01FCF4E08A954540054247B /* Build configuration list for PBXProject "wagic" */;
 			compatibilityVersion = "Xcode 3.2";
@@ -2152,10 +2152,6 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = YES;
-				ARCHS = (
-					armv6,
-					"$(ARCHS_STANDARD_32_BIT)",
-				);
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				COPY_PHASE_STRIP = NO;
@@ -2205,10 +2201,6 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ARCHS = (
-					armv6,
-					"$(ARCHS_STANDARD_32_BIT)",
-				);
 				CODE_SIGN_IDENTITY = "iPhone Distribution";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Distribution";
 				COPY_PHASE_STRIP = YES;
@@ -2252,10 +2244,6 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = YES;
-				ARCHS = (
-					armv6,
-					"$(ARCHS_STANDARD_32_BIT)",
-				);
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				COPY_PHASE_STRIP = NO;
@@ -2304,10 +2292,6 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ARCHS = (
-					armv6,
-					"$(ARCHS_STANDARD_32_BIT)",
-				);
 				CODE_SIGN_IDENTITY = "iPhone Distribution";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Distribution";
 				COPY_PHASE_STRIP = YES;
@@ -2348,7 +2332,6 @@
 		C01FCF4F08A954540054247B /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_UNIVERSAL_IPHONE_OS)";
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				DEPLOYMENT_LOCATION = NO;
@@ -2359,6 +2342,7 @@
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				HEADER_SEARCH_PATHS = ../../Boost/boost;
 				IPHONEOS_DEPLOYMENT_TARGET = 5.1;
+				ONLY_ACTIVE_ARCH = YES;
 				OTHER_CFLAGS = (
 					"-DTIXML_USE_STL",
 					"-fno-objc-arc",
@@ -2372,7 +2356,6 @@
 		C01FCF5008A954540054247B /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_UNIVERSAL_IPHONE_OS)";
 				CODE_SIGN_IDENTITY = "iPhone Distribution";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Distribution";
 				GCC_C_LANGUAGE_STANDARD = c99;

projects/mtg/wagic.xcodeproj/xcuserdata/mnguyen.xcuserdatad/xcschemes/wagic-opengl1.1.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0500"
+   LastUpgradeVersion = "0510"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

projects/mtg/wagic.xcodeproj/xcuserdata/mnguyen.xcuserdatad/xcschemes/wagic.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0500"
+   LastUpgradeVersion = "0510"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"