stdio.h

[Vincent Lefevre]

On 2022-08-22 14:17:08 +0200, Paul Zimmermann wrote:
>        Hi,
> 
> the fine manual says:
> 
>    All declarations needed to use GMP are collected in the include file
>    'gmp.h'.  It is designed to work with both C and C++ compilers.
> 
> 	#include <gmp.h>
> 
>       Note however that prototypes for GMP functions with 'FILE *'
>    parameters are only provided if '<stdio.h>' is included too.
> 
> 	#include <stdio.h>
> 	#include <gmp.h>
> 
> What is the reason why <stdio.h> is not included by default?

I suppose that it may not be provided everywhere, e.g. on some
freestanding implementations (if supported by GMP).

Even on desktop machines, if libc6-dev is not installed:
  https://stackoverflow.com/questions/19580758/gcc-fatal-error-stdio-h-no-such-file-or-directory

BTW, in Debian, libgmp-dev doesn't depend on libc6-dev.

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