I must have copied the wrong template. The correct one has ffmpeg-devel and 
terminates makedepends properly. I've added a do_build function with the 
cflags your specified, and removed the wrksrc directory. Everything is fine 
now, thanks.

new template <http://pastebin.com/uvAi8uwT>

On Monday, February 2, 2015 at 6:47:21 AM UTC-6, Stefan Mühlinghaus wrote:
>
> Several points I noticed:
>
>    1. The wrksrc-line is unneccessary, that is the default
>    2. The makedepends-line is not terminated correctly and it is missing 
>    the "ffmpeg-devel" package
>    3. Build in the do_build() function, not in pre_build()
>    4. Usually, calling make yourself like this is unneccessary. It is 
>    done automatically by setting the build_style to gnu-make. However, it 
>    won't compile like this without a little help:
>    
>
> do_build() {
>         CFLAGS="-O2 -std=c99" make
> }
>