On Fri, Jul 15, 2016 at 09:22:43AM +0200, Peter Zijlstra wrote:

On Fri, Jul 15, 2016 at 05:06:54PM +1000, Stephen Rothwell wrote:

quoted

interacting with commit

  2a00f026a15d ("tools: Fix up BITS_PER_LONG setting")

from the tip tree.

Yuck.. that thing is horrid :/

What's wrong with so?

And if you really want to retain CONFIG_64BIT (because other headers
might want it, and they currently do not) then do something like:

#ifdef __LP64__
#define CONFIG_64BIT
#else
#define CONFIG_32BIT
#endif

All GCC versions I checked have __CHAR_BIT__ and __SIZEOF_LONG__.

(and I checked most everything from 4.4 - 6.1)

clang-3.8 also defines all three of those, and I don't consider that a
usable compiler as it doesn't even build a kernel.