Re: [Mingw-users] hex-float printf

[Brian D. <br...@de...>]

Erik de Castro Lopo wrote:

> The required behaviour for printf changed slightly with the ISO 1999
> C standard. The %a conversion specifier is just one of these C99
> features that the microsoft C library does not support even 7 years
> after the standard was released.
> 
> In this respect at least, the bahaviour of printf on Linux is the
> correct one.
> 
> So this is actually a bug, but not a bug in MinGW, rather it is a
> bug in the windows run time library.

Yes.  MSVCRT doesn't really support a lot of C99.  Some of it is faked
via supplimental functions in libmingwex, but in the case of printf()
you get whatever is in MSVCRT, which is C89 apparently:

http://msdn.microsoft.com/library/en-us/vclib/html/_crt_format_specification_fields_.2d_.printf_and_wprintf_functions.asp
http://msdn.microsoft.com/library/en-us/vclib/html/_crt_printf_type_field_characters.asp

Brian