Folks, I'm using gcc-4.4.1(4.4.1-4ubuntu9 to be precise) on Ubuntu and after trying to make PCH work properly for some time I found that precompiled headers are not used if -c option used. Experimenting with different options I discovered that it's the -fpch-preprocess option which enables PCH in this case. Is it an expected behavior? If yes, maybe it should be documented here http://gcc.gnu.org/onlinedocs/gcc/Precompiled-Headers.html in order to save some time for others :) -- Best regards, Pavel