Re: [PATCH v3 4/9] osdep.h: Always include <sys/signal.h> if it exists

[Thomas Huth <thuth@redhat.com>]

On 03/07/2020 16.56, Peter Maydell wrote:
> From: David CARLIER <devnexen@gmail.com>
> 
> Regularize our handling of <sys/signal.h>: currently we include it in
> osdep.h, but only for OpenBSD, and we include it without an ifdef
> guard in a couple of C files.  This causes problems for Haiku, which
> doesn't have that header.
> 
> Instead, check in configure whether sys/signal.h exists, and if it
> does then always include it from osdep.h.
> 
> Signed-off-by: David Carlier <devnexen@gmail.com>
> [PMM: Expanded commit message]
> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>  configure                   | 8 ++++++++
>  include/qemu/osdep.h        | 2 +-
>  hw/xen/xen-legacy-backend.c | 1 -
>  util/oslib-posix.c          | 1 -
>  4 files changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/configure b/configure
> index ddc53d873ef..d131f760d8f 100755
> --- a/configure
> +++ b/configure
> @@ -3212,6 +3212,11 @@ if ! check_include "ifaddrs.h" ; then
>    have_ifaddrs_h=no
>  fi
>  
> +have_sys_signal_h=no
> +if check_include "sys/signal.h" ; then
> +  have_sys_signal_h=yes
> +fi
> +
>  ##########################################
>  # VTE probe
>  
> @@ -7398,6 +7403,9 @@ fi
>  if test "$have_broken_size_max" = "yes" ; then
>      echo "HAVE_BROKEN_SIZE_MAX=y" >> $config_host_mak
>  fi
> +if test "$have_sys_signal_h" = "yes" ; then
> +    echo "CONFIG_SYS_SIGNAL=y" >> $config_host_mak
> +fi

I'd maybe rather name it HAVE_SYS_SIGNAL_H, but I guess that's just a
matter of taste.

Reviewed-by: Thomas Huth <thuth@redhat.com>