selective linking of floating point support for *printf / *scanf

[Thomas Preud'homme]

> -----Original Message-----
> From: gcc-owner@gcc.gnu.org [mailto:gcc-owner@gcc.gnu.org] On Behalf
> Of Thomas Preud'homme
> Sent: Saturday, August 30, 2014 12:27 PM
> Mmmh indeed. I checked C99 and section 7.1.3 paragraph 1 third clause
> states:
> 
> "All identifiers that begin with an underscore and either an uppercase letter
> or
> another underscore are always reserved for any use."
> 
> Next clause express how single underscore not followed by a capital letter
> is
> reserved:
> 
> "All identifiers that begin with an underscore are always reserved for use as
> identifiers
> with file scope in both the ordinary and tag name spaces."
> 
> Since here we are talking about linkage, _printf_float is not safe according
> to the
> standard.

Sorry for restating what Eric Blake already said, I didn't see his message at
first as it was (surprisingly) classified as spam.

Best regards,

Thomas