From 4962eba9817fd46a69cd115d1fdd48a7737072aa Mon Sep 17 00:00:00 2001
From: Ben Boeckel <ben.boeckel@kitware.com>
Date: Tue, 26 Dec 2023 11:05:37 -0500
Subject: cmDyndepCollation: clarify CXX_MODULES-without-BMI error message

Fixes: #25493
---
 Source/cmDyndepCollation.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Source/cmDyndepCollation.cxx b/Source/cmDyndepCollation.cxx
index 75f88b2..edf56ff 100644
--- a/Source/cmDyndepCollation.cxx
+++ b/Source/cmDyndepCollation.cxx
@@ -493,7 +493,8 @@ bool cmDyndepCollation::WriteDyndepMetadata(
       if (!has_provides) {
         cmSystemTools::Error(
           cmStrCat("Output ", object.PrimaryOutput,
-                   " is of type `CXX_MODULES` but does not provide a module"));
+                   " is of type `CXX_MODULES` but does not provide a module "
+                   "interface unit or partition"));
         result = false;
         continue;
       }
-- 
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