From a3b8ba1ea76fed71004fe79ebaaaa004bad6f37f Mon Sep 17 00:00:00 2001
From: Hongjiang YE <hongjiang.ye@outlook.com>
Date: Thu, 1 Aug 2024 02:31:56 +0800
Subject: [PATCH] Fix build error in windows by preventing duplicated DLL
 copies

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0def16b..5cffe24 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -252,7 +252,7 @@ function(create_project_from_sources chapter demo)
         if(WIN32)
             # configure_file(${SHADER} "test")
             add_custom_command(TARGET ${NAME} PRE_BUILD COMMAND ${CMAKE_COMMAND} -E copy ${SHADER} $<TARGET_FILE_DIR:${NAME}>)
-			add_custom_command(TARGET ${NAME} PRE_BUILD COMMAND ${CMAKE_COMMAND} -E copy ${DLLS} $<TARGET_FILE_DIR:${NAME}>)
+			add_custom_command(TARGET ${NAME} PRE_BUILD COMMAND ${CMAKE_COMMAND} -E copy_if_different ${DLLS} $<TARGET_FILE_DIR:${NAME}>)
         elseif(UNIX AND NOT APPLE)
             file(COPY ${SHADER} DESTINATION ${CMAKE_SOURCE_DIR}/bin/${chapter})
         elseif(APPLE)