Re: Getting AC_PROG_CC_C99

[Paul Eggert]

On 09/30/11 02:06, Bruno Haible wrote:
>  -- Macro: AC_PROG_CC_STDC
>      If the C compiler cannot compile ISO Standard C (currently C99),
>      ...
> 
> sounds like this macro will then be modified to enable C1X instead of C99.

Yes.

> But I expect that many packages will not need this.

It shouldn't hurt if they use it.  No packages that I know
of require C99 and break with C1x.  On the contrary, the
more typical case is a package that uses C1x features if
available.

The macro AC_PROG_CC_STDC means "Use the most-recent
version of C that's supported", not "Require the most-recent
version of C and fail if it's not supported".  All
gnulib modules (and all packages) should work in such an
environment.

I'm assuming that C1x will be close to its draft; if it changes,
so that C1x is undesirable in important and plausible cases, we'd
have to address that.  I doubt whether this will be an issue,
though.