From be387ca36ea47d3315ab922bd375f1f95987b71d Mon Sep 17 00:00:00 2001
From: cielavenir <cielartisan@gmail.com>
Date: Fri, 31 Jan 2025 09:44:16 +0900
Subject: [PATCH] Use rsync to copy tbb libs to avoid relinking every time
 running make

---
 3rdparty/ipp/ipp.cmake | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/3rdparty/ipp/ipp.cmake b/3rdparty/ipp/ipp.cmake
index deaed2ab179..43217a3a474 100755
--- a/3rdparty/ipp/ipp.cmake
+++ b/3rdparty/ipp/ipp.cmake
@@ -55,7 +55,7 @@ ExternalProject_Add(ext_ipp
     URL_HASH SHA256=${IPP_HASH}
     DOWNLOAD_DIR "${OPEN3D_THIRD_PARTY_DOWNLOAD_DIR}/ipp"
     # Copy all libs from lib/tl/tbb to lib/ since Open3D cmake scripts only support one LIB_DIR per dependency
-    UPDATE_COMMAND ${CMAKE_COMMAND} -E copy_directory <SOURCE_DIR>/${IPP_SUBPATH}lib/tl/tbb/ <SOURCE_DIR>/${IPP_SUBPATH}lib/
+    UPDATE_COMMAND rsync -rut <SOURCE_DIR>/${IPP_SUBPATH}lib/tl/tbb/ <SOURCE_DIR>/${IPP_SUBPATH}lib/
     CONFIGURE_COMMAND ""
     BUILD_COMMAND ""
     INSTALL_COMMAND ""
@@ -65,4 +65,4 @@ ExternalProject_Add(ext_ipp
 
 ExternalProject_Get_Property(ext_ipp SOURCE_DIR)
 set(IPP_INCLUDE_DIR "${SOURCE_DIR}/${IPP_SUBPATH}include/")
-set(IPP_LIB_DIR "${SOURCE_DIR}/${IPP_SUBPATH}lib")
\ No newline at end of file
+set(IPP_LIB_DIR "${SOURCE_DIR}/${IPP_SUBPATH}lib")