On 5 April 2016 at 01:02, leon zadorin wrote: > ... but even if going by your way of reading docs and taking into > account that point alone (i.e. only one precomp. header in a > compilation) then the process of compiling a given precompiled header > could still use another (even if 1) precompiled header... It doesn't. You can verify that with 'strace' to see which files are opened.