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https://github.com/archlinuxarm/PKGBUILDs.git
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0926d17669
Properly set cortex-a72 optimizations for this package, see comment
in 0000-use-mcpu-avoiding-march-and-mtune.patch for more details.
Should be totally fine in doing so since this only RPi 4 can actually
make use of the HW decoding intended for v19 once it goes final and the
patchset is gets merged into ffmpeg (at some point).
In addition to that, fix a small bug in kodi.service, for details see:
909f274d6e
41 lines
1.4 KiB
Diff
41 lines
1.4 KiB
Diff
From 2e2417894ac5d35bc3d93b86c18f4df299f4d933 Mon Sep 17 00:00:00 2001
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From: graysky <graysky@archlinux.us>
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Date: Sat, 12 Dec 2020 09:10:28 -0500
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Subject: [PATCH] use -mcpu= avoiding -march and -mtune for armv7h
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From what I understand, when building on ARM, it's best to avoid the -march=
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flag and rather use -mcpu= flag due to differences in meaning on ARM vs x86[1].
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Additionally, this patch avoids thousands of warns like the following when
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building for armv7h:
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cc1: warning: switch '-mcpu=cortex-a72' conflicts with '-march=armv8-a'
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This is due to the way ffmpeg's configure script defines -march=armv8-a when it
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encounters any cortex-a* passed to it.
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for reference and to experiment:
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untar ffmpeg, run ./configure, then inspect the output of ffbuild/config.mak and adjust:
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kodi-build/build/ffmpeg/src/ffmpeg-build/ffmpeg-prefix/src/ffmpeg-build/ffbuild/config.mak
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1. https://community.arm.com/developer/tools-software/tools/b/tools-software-ides-blog/posts/compiler-flags-across-architectures-march-mtune-and-mcpu
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---
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configure | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/configure b/configure
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index 8569a60..0d3aafb 100755
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--- a/configure
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+++ b/configure
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@@ -4948,7 +4948,7 @@ elif enabled arm; then
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case $cpu in
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armv*)
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- cpuflags="-march=$cpu"
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+ cpuflags="-mcpu=cortex-a72"
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subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
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;;
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*)
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--
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2.29.2
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