[Bug pch/57242] gcc ignores precompiled headers unless the .gch and TU's are compiled with certain combinations of -g flag

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57242

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is by design as -g changes the information produced by the front-end and
maybe even predefines too.