Support: allow building with non-C/C++ language linkers (#65634)

Author: compnerd

llvm/lib/Support/CMakeLists.txt

@@ -79,7 +79,11 @@ endif( MSVC OR MINGW )
 # Delay load shell32.dll if possible to speed up process startup.
 set (delayload_flags)
 if (MSVC)
-  set (delayload_flags delayimp -delayload:shell32.dll -delayload:ole32.dll)
+  # When linking with Swift, `swiftc.exe` is used as the linker drive rather
+  # than invoking `link.exe` directly.  In such a case, the flags should be
+  # marked as `-Xlinker` to pass them directly to the linker.  As a temporary
+  # workaround simply elide the delay loading.
+  set (delayload_flags $<$<NOT:$<LINK_LANGUAGE:Swift>>:delayimp -delayload:shell32.dll -delayload:ole32.dll>)
 endif()
 
 # Link Z3 if the user wants to build it.