Use cp -rp to copy tbb libs to avoid relinking every time running make (#7155)

Author: cielavenir

3rdparty/ipp/ipp.cmake

@@ -17,12 +17,16 @@ if(APPLE AND CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL x86_64)
     set(IPP_VERSION_INT 20210901)
     set(IPP_URL "https://github.com/isl-org/open3d_downloads/releases/download/mkl-static-2024.1/ipp_static-2021.9.1-macosx_10_15_x86_64.tar.xz")
     set(IPP_HASH "f27e45da604a1f6d1d2a747a0f67ffafeaff084b0f860a963d8c3996e2f40bb3")
+    set(COPY_TBB_COMMAND cp -rp)
 elseif(WIN32 AND CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL AMD64)
     set(IPP_URL "https://github.com/isl-org/open3d_downloads/releases/download/mkl-static-2024.1/ipp_static-2021.11.0-win_amd64.zip") 
     set(IPP_HASH "69e8a7dc891609de6fea478a67659d2f874d12b51a47bd2e3e5a7c4c473c53a6")
+    cmake_minimum_required(VERSION 3.26)  # for copy_directory_if_different
+    set(COPY_TBB_COMMAND ${CMAKE_COMMAND} -E copy_directory_if_different)
 elseif(UNIX AND CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL x86_64)
     set(IPP_URL "https://github.com/isl-org/open3d_downloads/releases/download/mkl-static-2024.1/ipp_static-2021.11.0-linux_x86_64.tar.xz")
     set(IPP_HASH "51f33fd5bf5011e9eae0e034e5cc70a7c0ac0ba93d6a3f66fd7e145cf1a5e30b")
+    set(COPY_TBB_COMMAND cp -rp)
 else()
     set(WITH_IPP OFF)
     message(FATAL_ERROR "Intel IPP disabled: Unsupported Platform.")
@@ -55,7 +59,7 @@ ExternalProject_Add(ext_ipp
     URL_HASH SHA256=${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 ${COPY_TBB_COMMAND} <SOURCE_DIR>/${IPP_SUBPATH}lib/tl/tbb/. <SOURCE_DIR>/${IPP_SUBPATH}lib/
     CONFIGURE_COMMAND ""
     BUILD_COMMAND ""
     INSTALL_COMMAND ""
@@ -65,4 +69,4 @@ 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")
+set(IPP_LIB_DIR "${SOURCE_DIR}/${IPP_SUBPATH}lib")