On 2013-03-15 12:05 AM, Russ Allbery wrote:
Zack Weinberg <zackw@xxxxxxxxx> writes:
I think we should try to come up with a principled cutoff for how old is
too old, though. I started this thinking POSIX.1-2001 (including XSI,
but maybe not any other options) was a reasonable place to draw the
line, but it turns out Android omits a bunch of that (and not the old
junk either) so it's not so simple.
"You can assume a C89 hosted environment" does still seem like a sound
assertion, though.
It's also important not to exclude Windows, which sometimes is missing
some things that are otherwise universal.
Quite so; I have been at pains to divide everything beyond C89 into
"truly universal" and "not available on Windows". And I do find it
useful to be able to reuse configure in one of the pseudo-Unix
environments on Windows.
However, I think the right way to handle Windows/not-Windows *in the
code* is with #if(n)def _WIN32. One probably needs to do more than just
avoid unavailable headers, after all.
I should also emphasize that what I've been doing is *only* about the
presence of headers, not their contents.
zw
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