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Date: Sat, 22 Jun 2024 17:17:49 +0900
To: cygwin@cygwin.com
Subject: Re: Analyze dependencies of a cygwin package
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From: Takashi Yano via Cygwin <cygwin@cygwin.com>
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On Sat, 22 Jun 2024 07:36:19 +0200
Federico Kircheis wrote:
> ffmpeg, as far as I've could see, on Debian does not seem to depend 
> transitively on clang.

ffmpeg on fedora is built with opencl-enabled.
https://src.fedoraproject.org/rpms/ffmpeg/blob/rawhide/f/ffmpeg.spec#_702

I just followed to it. However, cygwin's OpenCL (ocl-icd) suppourts only
pocl as backend which depends on clang. Therefore, on the second thought,
enabling opencl for ffmpeg has more disadvantages than advantages.

I'll release ffmpeg 7.0.1-2 which disables opencl.

> I was already told once that I probably can leave REQUIRES out.
> 
> Currently I'm using it for setting up a minimal test environment where I 
> install only the packages listed in REQUIRES.
> Can cygport give me that information if I do not write any REQUIRES?
> Last time I asked the answer was no, and thus I decided to keep it to 
> ease testing on my side.

Without REQUIRES line, "cygport cmus all" with above patch gives me:
....
>>> cmus requires: cygwin libao4 libavcodec61 libavformat61 libavutil59 libcddb2 libcdio18 libcdio_cdda2 libdiscid0 libFLAC12 libiconv2 libmad0 libmodplug1 libmpcdec7 libncursesw10 libopusfile0 libpulse0 libswresample5 libvorbisfile3 libwavpack1

I guess this is as you expect (if libav* are free from clang dependency),
isn't it?

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>

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