Re: [PATCH,RFC] Change __convert_from_v to use snprintf and use it

[Loren James Rittle <rittle at latour dot rsch dot comm dot mot dot com>]

>....just means that a check for snprintf should be added to
>
>acinclude.m4/GLIBCPP_ENABLE_C99
>
>and the code conditionalized, like
>
>#if _GLIBCPP_USE_C99
>//use snprintf
>#else
>//loose
>#endif

FYI, snprintf() is a lot more widespread than just C99 hosts.  E.g.,
this text was written in or before 1993 for the printf(3), et al man
page on BSD systems:

    "[...] For safety, programmers should use the snprintf() inter-
     face instead.  Unfortunately, this interface is not portable."

I thought that the tao of autoconf says that we look for target
support at a granularity finer than any particular ISO standard level.
Grouping a bunch of stuff into GLIBCPP_ENABLE_C99 that affects QoI in
addition to what libstdc++-v3 exposes to users via its library headers
seems wrong to me.  However, I will not complain after observing this
point since I can't offer to help at the moment (since I am having a
devil of a time just finding the time required to keep my targets
above water).

Regards,
Loren