argh!

[Ulrich Drepper]

Zack Weinberg <zack@rabi.columbia.edu> writes:

> I see.  Your idea is good.  The header doesn't have to be generated:
> just do e.g.
> 
> #ifdef __linux__
> #if KERNEL_LOWEST_REV >= 1
> #define HAVE_O_DIRECTORY
> #define HAVE_TIOCGPTN

No, this is not possible.  Assume someone who has the latest kernel
(including headers) installed and wants to compile a binary used by
many other people who might not have the same kernel.

The selection of the assumptions must be based on explicit user
decisions, not on implicit information gained from the system headers.

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