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diff --git a/externals/cmake-modules/WindowsCopyFiles.cmake b/externals/cmake-modules/WindowsCopyFiles.cmake
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+# Copyright 2016 Citra Emulator Project
+# Licensed under GPLv2 or any later version
+# Refer to the license.txt file included.
+
+# This file provides the function windows_copy_files.
+# This is only valid on Windows.
+
+# Include guard
+if(__windows_copy_files)
+ return()
+endif()
+set(__windows_copy_files YES)
+
+# Any number of files to copy from SOURCE_DIR to DEST_DIR can be specified after DEST_DIR.
+# This copying happens post-build.
+function(windows_copy_files TARGET SOURCE_DIR DEST_DIR)
+ # windows commandline expects the / to be \ so switch them
+ string(REPLACE "/" "\\\\" SOURCE_DIR ${SOURCE_DIR})
+ string(REPLACE "/" "\\\\" DEST_DIR ${DEST_DIR})
+
+ # /NJH /NJS /NDL /NFL /NC /NS /NP - Silence any output
+ # cmake adds an extra check for command success which doesn't work too well with robocopy
+ # so trick it into thinking the command was successful with the || cmd /c "exit /b 0"
+ add_custom_command(TARGET ${TARGET} POST_BUILD
+ COMMAND if not exist ${DEST_DIR} mkdir ${DEST_DIR} 2> nul
+ COMMAND robocopy ${SOURCE_DIR} ${DEST_DIR} ${ARGN} /NJH /NJS /NDL /NFL /NC /NS /NP || cmd /c "exit /b 0"
+ )
+endfunction() \ No newline at end of file