[xcode27.0] Baseline update for Xcode 27.0 Beta 1

Make.config

@@ -146,8 +146,8 @@ NUGET_RELEASE_BRANCH=release/10.0.1xx
 ##
 ## Note that the prerelease identifier should be as short as possible, because otherwise
 ## the resulting package name can become too long for MSIs.
-NUGET_HARDCODED_PRERELEASE_IDENTIFIER=xcode26.5
-NUGET_HARDCODED_PRERELEASE_BRANCH=xcode26.5
+NUGET_HARDCODED_PRERELEASE_IDENTIFIER=xcode27.0
+NUGET_HARDCODED_PRERELEASE_BRANCH=xcode27.0
 
 # compute the alphanumeric version of branch names
 NUGET_RELEASE_BRANCH_ALPHANUMERIC:=$(shell export LANG=C; printf "%s" "$(NUGET_RELEASE_BRANCH)" | tr -c '[a-zA-Z0-9-]' '-')
@@ -209,10 +209,10 @@ MACCATALYST_NUGET_VERSION_FULL=$(MACCATALYST_NUGET_VERSION_NO_METADATA)$(NUGET_B
 -include $(TOP)/configure.inc
 
 # Xcode version should have both a major and a minor version (even if the minor version is 0)
-XCODE_VERSION=26.5
-XCODE_URL=https://bosstoragemirror.blob.core.windows.net/internal-files/xcodes/Xcode_26.5.xip
+XCODE_VERSION=27.0
+XCODE_URL=https://bosstoragemirror.blob.core.windows.net/internal-files/xcodes/Xcode_27_beta.xip
 ifndef NO_XCODE
-XCODE_DEVELOPER_ROOT?=/Applications/Xcode_26.5.0.app/Contents/Developer
+XCODE_DEVELOPER_ROOT?=/Applications/Xcode_27.0.0-beta.app/Contents/Developer
 ifneq (OK,$(shell test -d $(abspath $(XCODE_DEVELOPER_ROOT)) && echo OK))
 NO_XCODE=1
 $(warning The required Xcode ($(XCODE_VERSION)) is not installed in $(XCODE_DEVELOPER_ROOT) - this directory does not exist. Any parts of the build that require Xcode will be disabled.)
@@ -290,14 +290,14 @@ MAX_TVOS_SIMULATOR_VERSION=$(TVOS_SDK_VERSION)
 endif
 
 # Minimum OS versions for running XI/XM apps.
-MIN_IOS_SDK_VERSION=12.2
+MIN_IOS_SDK_VERSION=15.0
 MIN_MACOS_SDK_VERSION=12.0
-MIN_TVOS_SDK_VERSION=12.2
+MIN_TVOS_SDK_VERSION=15.0
 MIN_MACCATALYST_SDK_VERSION=15.0
 
 # Minimum OS versions for .NET 9 support
-DOTNET_MIN_IOS_SDK_VERSION=12.2
-DOTNET_MIN_TVOS_SDK_VERSION=12.2
+DOTNET_MIN_IOS_SDK_VERSION=15.0
+DOTNET_MIN_TVOS_SDK_VERSION=15.0
 DOTNET_MIN_MACCATALYST_SDK_VERSION=15.0
 DOTNET_MIN_MACOS_SDK_VERSION=12.0
 

Make.versions

@@ -21,10 +21,10 @@
 # IMPORTANT: There must be *no* managed API differences unless the two first
 # numbers (major.minor) changes.
 
-IOS_NUGET_OS_VERSION=26.5
-TVOS_NUGET_OS_VERSION=26.5
-MACOS_NUGET_OS_VERSION=26.5
-MACCATALYST_NUGET_OS_VERSION=26.5
+IOS_NUGET_OS_VERSION=27.0
+TVOS_NUGET_OS_VERSION=27.0
+MACOS_NUGET_OS_VERSION=27.0
+MACCATALYST_NUGET_OS_VERSION=27.0
 
 # The following are the OS versions we first supported with the current .NET version.
 # These versions must *not* change with minor .NET updates, only major .NET releases.

builds/Versions-MacCatalyst.plist.in

@@ -29,6 +29,7 @@
 			<string>26.2</string>
 			<string>26.4</string>
 			<string>26.5</string>
+			<string>27.0</string>
 		</array>
 	</dict>
 	<key>SupportedTargetPlatformVersions</key>
@@ -68,6 +69,7 @@
 			<string>26.2</string>
 			<string>26.4</string>
 			<string>26.5</string>
+			<string>27.0</string>
 		</array>
 	</dict>
 	<key>MacCatalystVersionMap</key>
@@ -132,6 +134,8 @@
 		<string>26.4</string>
 		<key>26.5</key>
 		<string>26.5</string>
+		<key>27.0</key>
+		<string>27.0</string>
 	</dict>
 	<key>RecommendedXcodeVersion</key>
 	<string>@XCODE_VERSION@</string>

builds/Versions-iOS.plist.in

@@ -8,22 +8,6 @@
 	<dict>
 		<key>iOS</key>
 		<array>
-			<string>12.2</string>
-			<string>12.3</string>
-			<string>12.4</string>
-			<string>13.0</string>
-			<string>13.1</string>
-			<string>13.2</string>
-			<string>13.3</string>
-			<string>13.4</string>
-			<string>13.5</string>
-			<string>13.6</string>
-			<string>14.0</string>
-			<string>14.1</string>
-			<string>14.2</string>
-			<string>14.3</string>
-			<string>14.4</string>
-			<string>14.5</string>
 			<string>15.0</string>
 			<string>15.2</string>
 			<string>15.4</string>
@@ -46,6 +30,7 @@
 			<string>26.2</string>
 			<string>26.4</string>
 			<string>26.5</string>
+			<string>27.0</string>
 		</array>
 	</dict>
 	<key>SupportedTargetPlatformVersions</key>
@@ -104,6 +89,7 @@
 			<string>26.2</string>
 			<string>26.4</string>
 			<string>26.5</string>
+			<string>27.0</string>
 		</array>
 	</dict>
 	<key>RecommendedXcodeVersion</key>

builds/Versions-macOS.plist.in

@@ -29,6 +29,7 @@
 			<string>26.2</string>
 			<string>26.4</string>
 			<string>26.5</string>
+			<string>27.0</string>
 		</array>
 	</dict>
 	<key>SupportedTargetPlatformVersions</key>
@@ -66,6 +67,7 @@
 			<string>26.2</string>
 			<string>26.4</string>
 			<string>26.5</string>
+			<string>27.0</string>
 		</array>
 	</dict>
 	<key>RecommendedXcodeVersion</key>

builds/Versions-tvOS.plist.in

@@ -8,18 +8,6 @@
 	<dict>
 		<key>tvOS</key>
 		<array>
-			<string>12.2</string>
-			<string>12.3</string>
-			<string>12.4</string>
-			<string>13.0</string>
-			<string>13.2</string>
-			<string>13.3</string>
-			<string>13.4</string>
-			<string>14.0</string>
-			<string>14.2</string>
-			<string>14.3</string>
-			<string>14.4</string>
-			<string>14.5</string>
 			<string>15.0</string>
 			<string>15.2</string>
 			<string>15.4</string>
@@ -41,6 +29,7 @@
 			<string>26.2</string>
 			<string>26.4</string>
 			<string>26.5</string>
+			<string>27.0</string>
 		</array>
 	</dict>
 	<key>SupportedTargetPlatformVersions</key>
@@ -94,6 +83,7 @@
 			<string>26.2</string>
 			<string>26.4</string>
 			<string>26.5</string>
+			<string>27.0</string>
 		</array>
 	</dict>
 	<key>RecommendedXcodeVersion</key>

dotnet/Templates/Microsoft.iOS.Templates/ios-notification-content-extension/csharp/.template.config/template.json

@@ -44,7 +44,7 @@
       "description": "Overrides SupportedOSPlatformVersion in the project file",
       "replaces": "minOSVersion",
       "datatype": "string",
-      "defaultValue": "13.0"
+      "defaultValue": "15.0"
     }
   },
   "defaultName": "iOSNotificationContentExtension1"

dotnet/Templates/Microsoft.iOS.Templates/ios-notification-service-extension/csharp/.template.config/template.json

@@ -44,7 +44,7 @@
       "description": "Overrides SupportedOSPlatformVersion in the project file",
       "replaces": "minOSVersion",
       "datatype": "string",
-      "defaultValue": "13.0"
+      "defaultValue": "15.0"
     },
     "extensionClassName": {
       "type": "parameter",

dotnet/Templates/Microsoft.iOS.Templates/ios/csharp/.template.config/template.json

@@ -35,7 +35,7 @@
       "description": "Overrides SupportedOSPlatformVersion in the project file",
       "replaces": "minOSVersion",
       "datatype": "string",
-      "defaultValue": "13.0"
+      "defaultValue": "15.0"
     },
     "deviceFamily": {
       "type": "parameter",

dotnet/Templates/Microsoft.iOS.Templates/ios/fsharp/.template.config/template.json

@@ -35,7 +35,7 @@
       "description": "Overrides SupportedOSPlatformVersion in the project file",
       "replaces": "minOSVersion",
       "datatype": "string",
-      "defaultValue": "13.0"
+      "defaultValue": "15.0"
     },
     "deviceFamily": {
       "type": "parameter",

dotnet/Templates/Microsoft.iOS.Templates/ios/visualbasic/.template.config/template.json

@@ -35,7 +35,7 @@
       "description": "Overrides SupportedOSPlatformVersion in the project file",
       "replaces": "minOSVersion",
       "datatype": "string",
-      "defaultValue": "13.0"
+      "defaultValue": "15.0"
     },
     "deviceFamily": {
       "type": "parameter",

dotnet/Templates/Microsoft.tvOS.Templates/tvos/csharp/.template.config/template.json

@@ -35,7 +35,7 @@
       "description": "Overrides SupportedOSPlatformVersion in the project file",
       "replaces": "minOSVersion",
       "datatype": "string",
-      "defaultValue": "12.2"
+      "defaultValue": "15.0"
     }
   },
   "defaultName": "tvOSApp1"

dotnet/Templates/Microsoft.tvOS.Templates/tvos/visualbasic/.template.config/template.json

@@ -35,7 +35,7 @@
       "description": "Overrides SupportedOSPlatformVersion in the project file",
       "replaces": "minOSVersion",
       "datatype": "string",
-      "defaultValue": "12.2"
+      "defaultValue": "15.0"
     }
   },
   "defaultName": "tvOSApp1"

eng/Version.Details.props

@@ -30,7 +30,7 @@ This file should be imported by eng/Versions.props
     <MicrosofttvOSSdknet90_185PackageVersion>18.5.9227</MicrosofttvOSSdknet90_185PackageVersion>
     <MicrosofttvOSSdknet90_265PackageVersion>26.5.9004</MicrosofttvOSSdknet90_265PackageVersion>
     <!-- dotnet-xharness dependencies -->
-    <MicrosoftDotNetXHarnessiOSSharedPackageVersion>11.0.0-prerelease.26264.1</MicrosoftDotNetXHarnessiOSSharedPackageVersion>
+    <MicrosoftDotNetXHarnessiOSSharedPackageVersion>11.0.0-prerelease.26311.1</MicrosoftDotNetXHarnessiOSSharedPackageVersion>
     <!-- xamarin-xamarin-macios dependencies -->
     <MicrosoftiOSSdknet90_180PackageVersion>18.0.9617</MicrosoftiOSSdknet90_180PackageVersion>
     <MicrosoftMacCatalystSdknet90_180PackageVersion>18.0.9617</MicrosoftMacCatalystSdknet90_180PackageVersion>

eng/Version.Details.xml

@@ -107,9 +107,9 @@
       <Uri>https://github.com/dotnet/dotnet</Uri>
       <Sha>aec921632e75e1f29327709dd52e98c41f3b55cf</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XHarness.iOS.Shared" Version="11.0.0-prerelease.26264.1">
+    <Dependency Name="Microsoft.DotNet.XHarness.iOS.Shared" Version="11.0.0-prerelease.26311.1">
       <Uri>https://github.com/dotnet/xharness</Uri>
-      <Sha>51ca379106cfd749a498cb0822210ef1aa926e41</Sha>
+      <Sha>0e34d7da9bb71292bc9dd802cac9c5c66b480de4</Sha>
     </Dependency>
     <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="10.0.0-beta.26281.104">
       <Uri>https://github.com/dotnet/dotnet</Uri>

mk/xamarin.mk

@@ -1,5 +1,5 @@
 # Available versions can be seen here:
 # https://dev.azure.com/dnceng/public/_artifacts/feed/dotnet-eng/NuGet/Microsoft.Tools.Mlaunch/versions
-MLAUNCH_NUGET_VERSION=1.1.113
+MLAUNCH_NUGET_VERSION=1.1.127
 # https://dev.azure.com/dnceng/public/_artifacts/feed/dotnet-eng/NuGet/AppleDocReader/versions
 ADR_NUGET_VERSION=1.0.0

msbuild/Xamarin.MacDev.Tasks/Tasks/PostTrimmingProcessing.cs

@@ -246,11 +246,33 @@ void GenerateInlinedDlfcnNativeCode (List<string> items)
 			// The generated C code uses 'extern void*' declarations and returns the address of the symbol.
 			// This is intentional: it allows the native linker to resolve the symbol at link time, which
 			// is the whole point of this optimization (avoiding dlsym at runtime).
+			//
+			// The symbols are declared with __attribute__((weak_import)), and we fall back to dlsym if the
+			// direct reference turns out to be null at runtime. There are two reasons for this:
+			//
+			// * The symbol might not exist at runtime even though it existed in the SDK we built against
+			//   (for example when the app runs on an older OS than the one it was built with). Without
+			//   weak_import a missing symbol makes dyld abort at launch; with it the reference resolves to
+			//   null instead.
+			//
+			// * A symbol can be exported by more than one framework in the SDK (for example
+			//   UIFontTextStyleBody is exported by both UIKit and AppKit in the macOS SDK). In that case the
+			//   native linker binds our reference to one of them (the order isn't specified), which might not
+			//   be the framework that actually exports the symbol at runtime on older OSes. When the bound
+			//   framework doesn't have it, we use dlsym (RTLD_DEFAULT) to find it in whichever loaded
+			//   framework does, restoring the behavior of the non-inlined dlfcn code path.
+			//
+			// The fast path (a direct reference when the symbol is present) is unchanged, and the managed
+			// caller caches the result, so the dlsym fallback runs at most once per symbol.
+			sb.AppendLine ("#include <dlfcn.h>");
+			sb.AppendLine ();
+			sb.AppendLine ("static void* xamarin_dlfcn_fallback (void* ptr, const char* symbol) { return ptr ? ptr : dlsym (RTLD_DEFAULT, symbol); }");
+			sb.AppendLine ();
 			foreach (var field in survivingSymbols.OrderBy (s => s)) {
 				// Using 'void*' as a stand-in type since we only need the address
-				sb.AppendLine ($"extern void* {field};");
+				sb.AppendLine ($"extern void* {field} __attribute__((weak_import));");
 				sb.AppendLine ($"void* xamarin_Dlfcn_{field}_Native ();");
-				sb.AppendLine ($"void* xamarin_Dlfcn_{field}_Native () {{ return &{field}; }}");
+				sb.AppendLine ($"void* xamarin_Dlfcn_{field}_Native () {{ return xamarin_dlfcn_fallback (&{field}, \"{field}\"); }}");
 				sb.AppendLine ();
 			}
 

runtime/trampolines.m

@@ -283,9 +283,15 @@
 	Method method = class_getInstanceMethod (cls, sel);
 	if (!method)
 		return NULL;
-	struct objc_method_description* m_desc;
-	m_desc = method_getDescription (method);
-	return m_desc ? m_desc->types : NULL;
+	// Read the method's Objective-C type encoding. We deliberately use method_getTypeEncoding
+	// instead of method_getDescription (method)->types: method_getTypeEncoding returns the same
+	// type-encoding string we previously read from the objc_method_description's 'types' field, but
+	// method_getDescription was marked deprecated in the Xcode 27 SDK (the <objc/runtime.h>
+	// annotation reads "first deprecated in macOS 11.0 - Use method_getName and
+	// method_getTypeEncoding"). The runtime is compiled with -Werror and -Wdeprecated-declarations,
+	// so a call to method_getDescription would break the build. Since we only ever consumed the
+	// 'types' field, method_getTypeEncoding is the exact, non-deprecated replacement.
+	return method_getTypeEncoding (method);
 }
 
 static int

scripts/generate-vs-workload/generate-vs-workload.cs

@@ -105,10 +105,30 @@
 			// So implement a custom version scheme for .NET 10 (in .NET 11 the inserted
 			// package name will be different, so we can use any version number we want,
 			// so we'll use the correct one).
+			//
+			// The scheme keeps the major fixed at 255 and uses the commit distance as the build component, and
+			// encodes the Xcode version into the minor component so the MSI version increases monotonically every
+			// time the Xcode major/minor increases (a newer Xcode must produce a higher MSI version), while staying
+			// just above the last bad version (255.220.39248) and below the MSI minor ceiling of 255.
+			//
+			// The minor bump is computed from the Xcode version as:
+			//     minorVersionBump = (Xcode major - 26) * 10 + Xcode minor
+			// Xcode 26 is the first Xcode that uses Apple's year-based version numbers, so subtracting 26 gives 0
+			// for the 26.x series, 1 for 27.x, 2 for 28.x, etc. Multiplying by 10 and adding the (single-digit)
+			// Xcode minor yields a value that strictly increases with the Xcode version:
+			//     26.5 => 5 (MSI minor 225), 27.0 => 10 (230), 27.5 => 15 (235), 28.0 => 20 (240), ...
+			// The final MSI minor is 220 + minorVersionBump. For Xcode 27.x and 28.x (and any 26.x with a non-zero
+			// minor) this is > 220, so the version exceeds the 255.220.39248 baseline on the minor component alone,
+			// regardless of the build component (only Xcode 26.0 would map to exactly 220, where the build component
+			// would instead have to exceed 39248). The minor stays <= 255 across .NET 10's supported Xcode range
+			// (26-28; 28.9 => 249) and would first overflow the 255 ceiling at Xcode 29.6 (=> 256), which is one
+			// reason this scheme is .NET-10-only. This relies on the Xcode minor being a single digit, which has
+			// always held.
+			//
+			// Note: this was previously written as (26 - Xcode major), which is negative for Xcode 27 and later
+			// and threw in the System.Version constructor (it rejects negative components), breaking the build.
 			var minimumVersion = new Version (255, 220, 39248); // This is the last incorrect MSI version, we need to produce something higher than this.
-																// bump minor version according to current Xcode version:
-																// minor = minimumVersion.Minor + (26 - Major Xcode version) * 10 + (Minor Xcode version)
-			var minorVersionBump = int.Parse (new Version (26 - Version.Parse (xcodeVersion).Major, Version.Parse (xcodeVersion).Minor).ToString ().Replace (".", ""));
+			var minorVersionBump = (Version.Parse (xcodeVersion).Major - 26) * 10 + Version.Parse (xcodeVersion).Minor;
 			// just use the commit distance for the build version, our minor version will be higher than the minimum version, so we can use any build version.
 			var buildVersionBump = commitDistances [platform];
 			var msiVersion = new Version (minimumVersion.Major, minimumVersion.Minor + minorVersionBump, buildVersionBump);

src/ARKit/ARSkeleton.cs

@@ -4,13 +4,13 @@
 
 namespace ARKit {
 	public partial class ARSkeleton {
-		[SupportedOSPlatform ("ios14.0")]
+		[SupportedOSPlatform ("ios")]
 		[UnsupportedOSPlatform ("maccatalyst")]
 		[UnsupportedOSPlatform ("tvos")]
 		[DllImport (Constants.ARKitLibrary)]
 		static extern IntPtr /* NSString */ ARSkeletonJointNameForRecognizedPointKey (/* NSString */ IntPtr recognizedPointKey);
 
-		[SupportedOSPlatform ("ios14.0")]
+		[SupportedOSPlatform ("ios")]
 		[UnsupportedOSPlatform ("maccatalyst")]
 		[UnsupportedOSPlatform ("tvos")]
 		public static NSString? CreateJointName (NSString recognizedPointKey)

src/AVFoundation/AVSpeechSynthesizer.cs

@@ -9,8 +9,8 @@ namespace AVFoundation {
 	/// <include file="../../docs/api/AVFoundation/AVSpeechSynthesizer.xml" path="/Documentation/Docs[@DocId='T:AVFoundation.AVSpeechSynthesizer']/*" />
 	public partial class AVSpeechSynthesizer {
 #if !XAMCORE_5_0
-		[SupportedOSPlatform ("tvos13.0")]
-		[SupportedOSPlatform ("ios13.0")]
+		[SupportedOSPlatform ("tvos")]
+		[SupportedOSPlatform ("ios")]
 		[SupportedOSPlatform ("maccatalyst")]
 		[SupportedOSPlatform ("macos")]
 		[BindingImpl (BindingImplOptions.Optimizable)]