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bug#39738: ffmpeg-4.2.2 fails to build on native i686-linux

From: Jan Nieuwenhuizen
Subject: bug#39738: ffmpeg-4.2.2 fails to build on native i686-linux
Date: Sat, 22 Feb 2020 16:47:14 +0100


When building ffmpeg-4.2.2 (current master, 
natively on 32bit hardware, the build fails because of two failing tests
(full log attached)

--8<---------------cut here---------------start------------->8---
--- ./tests/ref/fate/filter-pixdesc-grayf32be   2019-12-31 21:35:25.000000000 
+++ tests/data/fate/filter-pixdesc-grayf32be    2020-02-22 15:15:50.209912771 
@@ -1 +1 @@
-pixdesc-grayf32be   9b23c74e8e8ffae5d7c7e82bbf5929da
+pixdesc-grayf32be   01816b882016239d0cf84241818926a4
--- ./tests/ref/fate/filter-pixdesc-grayf32le   2019-12-31 21:35:25.000000000 
+++ tests/data/fate/filter-pixdesc-grayf32le    2020-02-22 15:15:50.253914049 
@@ -1 +1 @@
-pixdesc-grayf32le   291f074a24c44799a1f437d1c55556f1
+pixdesc-grayf32le   1b234318d06d5a76e980c376ad8764e5
Test filter-pixdesc-grayf32be failed. Look at 
tests/data/fate/filter-pixdesc-grayf32be.err for details.
make: *** [tests/Makefile:238: fate-filter-pixdesc-grayf32be] Error 1
make: *** Waiting for unfinished jobs....
Test filter-pixdesc-grayf32le failed. Look at 
tests/data/fate/filter-pixdesc-grayf32le.err for details.
make: *** [tests/Makefile:238: fate-filter-pixdesc-grayf32le] Error 1

Test suite failed, dumping logs.
command "make" "fate" "-j" "2" failed with status 2
--8<---------------cut here---------------end--------------->8---

How to attempt fixing this?

Building it on 64 bit hardware (much faster!) works for me, i.e. this

    guix build --system=i686-linux ffmpeg

works for me and can be used as a substitute...

Together with qemu-minimal-2.10 depending on ffmpeg
(https://bugs.gnu.org/39737) and no available substitutes this made for
a pretty rough "guix system reconfigure"-experience today.

I worked around this by adding a ffmpeg package that ignored the check
phase (#:tests? #f); I am wondering if we could we enable (something
like) that from the command line?  WDYT?

Apart from this hiccup I had a smooth upgrade from guix 0.14,


Attachment: lbnqlz4ppj0bgckksn7r25p385qawy-ffmpeg-4.2.2.drv.bz2
Description: Binary data

Jan Nieuwenhuizen <address@hidden> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | AvatarĀ® http://AvatarAcademy.com

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