[FFmpeg-devel] Re: [PATCH v3 1/5] configure: Add test_ioctl and test for SIOCGIFINDEX

["Rémi Denis-Courmont via ffmpeg-devel" <ffmpeg-devel@ffmpeg.org>]

Le 29 août 2025 17:04:55 GMT+03:00, Peter Enderborg <peterend@axis.com> a écrit :
>Adds a generic ioctl tester and a specific test  SIOCGIFINDEX
>that sets ioctl_gifindex. It is a network specific feature
>and the tests are run only in network context.

`if_nametoindex` is the prescribed standard function to do this (`atoi` can be used on Windows).

>Signed-off-by: Peter Enderborg <peterend@axis.com>
>---
> configure | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
>diff --git a/configure b/configure
>index 9fe28c5af4..b379a6bc92 100755
>--- a/configure
>+++ b/configure
>@@ -1282,6 +1282,20 @@ int x;
> EOF
> }
> 
>+test_ioctl(){
>+    log test_ioctl "$@"
>+    ctl=$1
>+    shift 1
>+    test_cc "$@" <<EOF
>+#include <stddef.h>
>+#include <sys/ioctl.h>
>+int f;
>+void x(){
>+ioctl(f, $ctl, NULL);
>+}
>+EOF
>+}
>+
> check_cflags(){
>     log check_cflags "$@"
>     test_cflags "$@" && add_cflags "$@"
>@@ -2542,6 +2556,7 @@ HAVE_LIST="
>     $TOOLCHAIN_FEATURES
>     $TYPES_LIST
>     gzip
>+    ioctl_gifindex
>     ioctl_posix
>     libdrm_getfb2
>     makeinfo
>@@ -6658,6 +6673,7 @@ if ! disabled network; then
>     else
>         disable network
>     fi
>+    test_ioctl SIOCGIFINDEX && enable ioctl_gifindex
> fi
> 
> check_builtin MemoryBarrier windows.h "MemoryBarrier()"
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