[FFmpeg-devel] [PATCH] lavf/os_support: Add safe win32 dlopen/dlclose/dlsym functions.

[Stephen Hutchinson]

On 10/29/2016 11:22 AM, Michael Niedermayer wrote:
> On Sat, Oct 29, 2016 at 06:35:19PM +1100, Matt Oliver wrote:
>>  configure              |    5 +----
>>  libavformat/avisynth.c |   14 +++++---------
>>  2 files changed, 6 insertions(+), 13 deletions(-)
>> b1568f39504e5e14c924d27c8f11ba8f5816d68c  0003-avformat-avisynth.c-Use-new-safe-dlopen-code.patch
>> From 633212cf1246b3fde61dd6515229e6a893005664 Mon Sep 17 00:00:00 2001
>> From: Matt Oliver <protogonoi at gmail.com>
>> Date: Sat, 29 Oct 2016 18:25:25 +1100
>> Subject: [PATCH 3/4] avformat/avisynth.c: Use new safe dlopen code.
>
> breaks --enable-avisynth on linux/ubuntu
>
> --- config.h    2016-10-29 17:17:55.214014842 +0200
> +++ delth/config.h      2016-10-29 17:15:41.906012034 +0200
> @@ -1155,7 +1155,7 @@
>  #define CONFIG_AST_DEMUXER 1
>  #define CONFIG_AU_DEMUXER 1
>  #define CONFIG_AVI_DEMUXER 1
> -#define CONFIG_AVISYNTH_DEMUXER 1
> +#define CONFIG_AVISYNTH_DEMUXER 0
>  #define CONFIG_AVR_DEMUXER 1
>  #define CONFIG_AVS_DEMUXER 1
>  #define CONFIG_BETHSOFTVID_DEMUXER 1
>
> [...]
>

Yeah, libdl needs to be linked to on non-Windows, and the
check for it got removed with the rest of the 'enabled avisynth'
case in configure. Just putting dlopen under avisynth_demuxer_deps 
doesn't seem to be sufficient for that to work.