add SerialStream support for MacCatalyst (#96492)

* add SerialStream support for MacCatalyst

* feedback from review

* Explicitly set SupportedOSPlatforms for maccatalyst

It'd default to the unsupported annotation from iOS otherwise.

---------

Co-authored-by: Alexander Köplinger <alex.koeplinger@outlook.com>

src/libraries/System.IO.Ports/Directory.Build.props

@@ -3,5 +3,6 @@
   <PropertyGroup>
     <IncludePlatformAttributes>true</IncludePlatformAttributes>
     <UnsupportedOSPlatforms>browser;ios;tvos</UnsupportedOSPlatforms>
+    <SupportedOSPlatforms>maccatalyst</SupportedOSPlatforms>
   </PropertyGroup>
 </Project>

src/libraries/System.IO.Ports/pkg/runtime.maccatalyst-arm64.runtime.native.System.IO.Ports.proj

@@ -0,0 +1,3 @@
+<Project>
+  <Import Project="runtime.native.System.IO.Ports.props" />
+</Project>

src/libraries/System.IO.Ports/pkg/runtime.maccatalyst-x64.runtime.native.System.IO.Ports.proj

@@ -0,0 +1,3 @@
+<Project>
+  <Import Project="runtime.native.System.IO.Ports.props" />
+</Project>

src/libraries/System.IO.Ports/pkg/runtime.osx-arm64.runtime.native.System.IO.Ports.proj

@@ -1,7 +1,3 @@
 <Project>
   <Import Project="runtime.native.System.IO.Ports.props" />
-  <PropertyGroup>
-    <!-- This is a native package, where package baseline validation doesn't really make much sense -->
-    <DisablePackageBaselineValidation>true</DisablePackageBaselineValidation>
-  </PropertyGroup>
 </Project>

src/libraries/System.IO.Ports/src/System/IO/Ports/SerialPort.Unix.cs

@@ -17,11 +17,13 @@ public static string[] GetPortNames()
             return OperatingSystem.IsLinux() ? GetPortNames_Linux()
                 : OperatingSystem.IsAndroid() ? GetPortNames_Linux()
                 : OperatingSystem.IsMacOS() ? GetPortNames_OSX()
+                : OperatingSystem.IsMacCatalyst() ? GetPortNames_OSX()
                 : OperatingSystem.IsFreeBSD() ? GetPortNames_FreeBSD()
 #else
             return RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ? GetPortNames_Linux()
                 : RuntimeInformation.IsOSPlatform(OSPlatform.Create("ANDROID")) ? GetPortNames_Linux()
                 : RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ? GetPortNames_OSX()
+                : RuntimeInformation.IsOSPlatform(OSPlatform.Create("MACCATALYST") ? GetPortNames_OSX()
                 : RuntimeInformation.IsOSPlatform(OSPlatform.Create("FREEBSD")) ? GetPortNames_FreeBSD()
 #endif
                 : throw new PlatformNotSupportedException(SR.PlatformNotSupported_SerialPort_GetPortNames);

src/native/libs/CMakeLists.txt

@@ -109,7 +109,7 @@ add_subdirectory(System.IO.Compression.Native)
 if (CLR_CMAKE_TARGET_UNIX OR CLR_CMAKE_TARGET_BROWSER OR CLR_CMAKE_TARGET_WASI)
     include(configure.cmake)
 
-    if (NOT CLR_CMAKE_TARGET_BROWSER AND NOT CLR_CMAKE_TARGET_WASI AND NOT CLR_CMAKE_TARGET_MACCATALYST AND NOT CLR_CMAKE_TARGET_IOS AND NOT CLR_CMAKE_TARGET_TVOS)
+    if (NOT CLR_CMAKE_TARGET_BROWSER AND NOT CLR_CMAKE_TARGET_WASI AND NOT CLR_CMAKE_TARGET_IOS AND NOT CLR_CMAKE_TARGET_TVOS)
         add_subdirectory(System.IO.Ports.Native)
     endif ()