On Wed, Nov 29, 2023 at 02:46:10PM +0100, Stefano Brivio wrote:
> lseek() is declared in unistd.h, and stdio.h provides sscanf().
> Include these two headers in port_fwd.c.
> 
> SIGCHLD, even if used exclusively for clone(), is defined in
> signal.h: add the include to util.h, as NS_CALL needs it.

In theory the clang-tidy warnings I recently suppressed for ensuring
we *directly* include the things we need would help avoid problems
like this.  Unfortunately it generates too many dumb warnings to be
usable.  I guess to do this correctly a checker would need to know the
official/standardised header for every libc function, and require you
to include that, whether or not that directly or directly contains it
on this particular system.

> Reported-by: lemmi <lemmi@nerd2nerd.org>
> Link: https://github.com/void-linux/void-packages/actions/runs/6999782606/job/19039526604#step:7:57
> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

> ---
>  port_fwd.c | 2 ++
>  util.h     | 1 +
>  2 files changed, 3 insertions(+)
> 
> diff --git a/port_fwd.c b/port_fwd.c
> index 7943a30..6f6c836 100644
> --- a/port_fwd.c
> +++ b/port_fwd.c
> @@ -17,6 +17,8 @@
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <sched.h>
> +#include <unistd.h>
> +#include <stdio.h>
>  
>  #include "util.h"
>  #include "port_fwd.h"
> diff --git a/util.h b/util.h
> index 1f02588..86f1a7e 100644
> --- a/util.h
> +++ b/util.h
> @@ -10,6 +10,7 @@
>  #include <stdarg.h>
>  #include <stdbool.h>
>  #include <string.h>
> +#include <signal.h>
>  
>  #include "log.h"
>  

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson