RE: Build failure: -Wno-unused-const-variable DNE on old GCC
From: David Laight
Date: Fri Jan 08 2016 - 05:17:49 EST
From: Michael Ellerman
> Sent: 08 January 2016 02:17
> > I doubt you plan to fix all those. So making -Werror configurable seems like
> > the only way forward, then. (Glad you agreed!)
>
> Yep, I'm happy to make Werror configurable.
>
> cxl can probably just use the existing PPC_WERROR.
Personally I think the development builds should be done with
both error -Werror and higher levels of warnings, even if the
ones that users tend to do ignore more warnings.
Clearly some warnings that some versions of gcc have included
in -Wall are just a PITA (like warning for __DATE__ and __TIME__).
The kernel headers do need fixing so that they pass compilation
with options like -Wwrite-strings (linux/mm.h doesn't).
David