build.ps1: enable the C++ interop on Windows

compnerd · compnerd · commit ce6ac28a1f8d · 2025-08-08T15:53:08.000-07:00
With the last changes to the C++ interop support in the new runtimes
build, the default on Windows matches what it is on Apple platforms.
Explicitly opt into the C++ overlay build on Windows.
diff --git a/utils/build.ps1 b/utils/build.ps1
@@ -2577,6 +2577,8 @@ function Build-ExperimentalRuntime([Hashtable] $Platform, [switch] $Static = $fa
         CMAKE_STATIC_LIBRARY_PREFIX_Swift = "lib";
 
         SwiftCore_DIR = "${RuntimeBinaryCache}\cmake\SwiftCore";
+
+        SwiftOverlay_ENABLE_CXX_INTEROP = "YES";
       }
 
     Build-CMakeProject `

Original file line number	Diff line number	Diff line change
`@@ -2577,6 +2577,8 @@ function Build-ExperimentalRuntime([Hashtable] $Platform, [switch] $Static = $fa`
`2577`	`2577`	`CMAKE_STATIC_LIBRARY_PREFIX_Swift = "lib";`
`2578`	`2578`
`2579`	`2579`	`SwiftCore_DIR = "${RuntimeBinaryCache}\cmake\SwiftCore";`
	`2580`	`+`
	`2581`	`+ SwiftOverlay_ENABLE_CXX_INTEROP = "YES";`
`2580`	`2582`	`}`
`2581`	`2583`
`2582`	`2584`	Build-CMakeProject `