From 60132272302f106c996aa15a0c42cb3de9789a24 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Sat, 18 Mar 2023 11:21:50 -0400
Subject: cmGlobalNinjaGenerator: Use forward slashes in clang modmap format on
 Windows

Issue: #24611
---
 Source/cmGlobalNinjaGenerator.cxx | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Source/cmGlobalNinjaGenerator.cxx b/Source/cmGlobalNinjaGenerator.cxx
index 4b894c7..914d1c7 100644
--- a/Source/cmGlobalNinjaGenerator.cxx
+++ b/Source/cmGlobalNinjaGenerator.cxx
@@ -2639,7 +2639,13 @@ bool cmGlobalNinjaGenerator::WriteDyndepFile(
     CxxModuleLocations locs;
     locs.RootDirectory = ".";
     locs.PathForGenerator = [this](std::string path) -> std::string {
-      return this->ConvertToNinjaPath(path);
+      path = this->ConvertToNinjaPath(path);
+#  ifdef _WIN32
+      if (this->IsGCCOnWindows()) {
+        std::replace(path.begin(), path.end(), '\\', '/');
+      }
+#  endif
+      return path;
     };
     locs.BmiLocationForModule =
       [&mod_files](std::string const& logical) -> cm::optional<std::string> {
-- 
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