Can I make use of precompiled header with -include?

[Zuxy Meng]

Hi,

We have a big project that might benefit from precompiled headers but we
don't want to append tens of thousands of .c files with #include "master.h".
Can we simply add -include "master.h" to CPPFLAGS during building? In this
way, is "master.h" the 1st one to be included for any .c file? Will gcc make
use of master.gch if master.h is given in command line?

Thanks!

-- 
Zuxy