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-rw-r--r--src/doc/rustc-dev-guide/src/tests/compiletest.md11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/doc/rustc-dev-guide/src/tests/compiletest.md b/src/doc/rustc-dev-guide/src/tests/compiletest.md
index dc886e25257..f47715889df 100644
--- a/src/doc/rustc-dev-guide/src/tests/compiletest.md
+++ b/src/doc/rustc-dev-guide/src/tests/compiletest.md
@@ -272,6 +272,17 @@ the debugger currently being used:
 
 [`tests/debuginfo`]: https://github.com/rust-lang/rust/tree/master/tests/debuginfo
 
+> **Note on acquiring `cdb.exe` on Windows 11**
+>
+> `cdb.exe` is acquired alongside a suitable "Windows 11 SDK" which is part of
+> the "Desktop Development with C++" workload profile in a Visual Studio
+> installer (e.g. Visual Studio 2022 installer).
+>
+> **HOWEVER** this is not sufficient by default alone. If you need `cdb.exe`,
+> you must go to Installed Apps, find the newest "Windows Software Development
+> Kit" (and yes, this can still say `Windows 10.0.22161.3233` even though the OS
+> is called Windows 11). You must then click "Modify" -> "Change" and then
+> selected "Debugging Tools for Windows" in order to acquire `cdb.exe`.
 
 ### Codegen tests