From 2c78a994afca81bf12c3e89f0217fcbc5c1b961f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lukas=20Br=C3=BCbach?= <Bruebach.Lukas@bdosecurity.de>
Date: Tue, 1 Sep 2026 17:18:55 +0200
Subject: [PATCH] [Build] Disable ccache auto-engage on Windows (MSVC)

---
 CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9775872ac..7b80387bb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,7 +39,9 @@ else()
   )
 endif()
 
-if(USE_CCACHE)
+# ccache does not support MSVC and must not auto-engage on Windows
+# (it is installed unintentionally on the Windows CI runner)
+if(USE_CCACHE AND NOT WIN32)
   find_program(CCACHE_PROGRAM ccache)
   if(CCACHE_PROGRAM)
     # Support Unix Makefiles and Ninja