[FFmpeg-devel] [PATCH] Vhook on MinGW

Ramiro Ribeiro Polla ramiro
Tue Jun 12 23:39:05 CEST 2007

Ramiro Polla wrote:
> Hello,
> I know vhook is coming to an end, and I never had to use it, so I 
> never bothered to try and make it work with MinGW.
> But someone wanted vhooks on Windows (not with cygwin), and cared to 
> pay to get it working, and it turns out it's simpler that I thought it 
> would be.
> MinGW doesn't have libdl, so vhooks will still be disabled for anyone 
> who doesn't specifically want vhooks and knows what they're doing. 
> Whoever wants them just needs to create a shared libdl.dll (there are 
> plenty of implementations around). A static libdl.a doesn't get picked 
> up by check_func (because of the order it appears on the command 
> line), and it's not worth changing this in FFmpeg.
> vhook1.diff
> Only print the warning in case vhooks have been enabled.
> vhook2.diff
> Also print the warning for MinGW.
> vhook3.diff
> Make ppm vhook depend on fork().
> vhook4.diff
> Copy flags from Cygwin.
> That's all it takes to get fish, null, and watermark to work wth MinGW.
> Freetype can be easily compiled, and gnuwin32 provides builds for an 
> old version. Imlib2 is way trickier to get working on MinGW (although 
> possible), but this is not related to FFmpeg.
I'll apply these tomorrow if there are no objections.

Ramiro Polla

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