Re: Avoiding #define uint8_t (and similar) in stdint.h

[Alan Barrett <AlanBarrett%verifaction.co.za@localhost>]

On Thu, 18 Dec 2014, Martin Husemann wrote:
> We have this strange construct in <stdint.h>:
>
> #ifndef uint8_t
> typedef __uint8_t       uint8_t;
> #define uint8_t         __uint8_t
> #endif
[...]
> I can not recall why we do the double bounce, but one way to avoid the
> different names would be:
>
> #define uint8_t uint8_t
>
> IIRC special macro expansion rules make this a valid construct and it probably
> can not break valid C++ code.

My preference is to do that.  I made such a proposal in one of the
public mailing lists earlier this year, but I have made no attempt to
implement it.

> Another option would be to remove the #ifdef dance alltogether and just risk
> duplicate (but identical) typedefs, using the compiler predefined defines:
>
> typedef __UINT8_TYPE__ uint8_t;

That's not allowed, and gcc warns about it with -Werror=pedantic.

--apb (Alan Barrett)