some package requires the timestamp is the same as it's built. For example llvm and clang compiler. And in 1.5.3, when populate the ext filesystem, the timestamp is updated. Please keep the time stamp in the rootfs file.
So, if I am understanding correctly, you want the files installed on the roofs using the same timestamp, since we use package managers to install the rootfs, it will install them that way. What's the real issue you are trying to resolve on the target system? This is likely not going to be a fixable situation, so I want to understand what the real issue is..
The target milestone should be 1.5.3. Starting to solve this problem. //Chen Qi
commit 05f172c745799a34aa8c530ac88b25c0081c15d8 Author: Chen Qi <Qi.Chen@windriver.com> Date: Mon May 26 22:15:16 2014 -0400 populate-extfs.sh: keep file timestamps Fix populate-extfs.sh to keep file timestamps while generating the ext file systems. [YOCTO #6348] (From OE-Core rev: f8c0359edc2ce740e13e874ea189770ff99d1525) Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>