PCH: Copy the timestamp from an absolute header file (!4400) · Merge requests · CMake / CMake

If target_precompile_headers contains a file from the project, then CMake will set the timestamp for cmake_pch.h|xx from that file.

This helps with ccache and precompile headers.

Fixes: #19923 (closed)
Backport: release

Edited Feb 26, 2020 by Brad King

PCH: Copy the timestamp from an absolute header file