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https://gitlab.alpinelinux.org/alpine/aports.git
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e9fa4208e0
- Don't modify CFLAGS in global scope
- Patch configure script to use -flto=auto. This significantly speeds up
linking.
- Use -O2 instead of the default -O3. Size difference for ffmpeg-libs:
15 MiB -> 12 MiB and no evidence that -O3 makes any significant
improvement.
My tests with:
time ffmpeg -i ~/bbb_sunflower_1080p_60fps_normal.mp4 \
-filter:v scale=720:-1 -c:a copy -f null -
Showed no difference between -O2 and -O3 on an x86_64 i9 machine and
with armv7 it showed a slightly drop of performance with -O3 (which may
be due to other factors as it is a shared machine).
16 lines
437 B
Diff
16 lines
437 B
Diff
diff --git a/configure b/configure
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index 9d6457d..f57df0d 100755
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--- a/configure
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+++ b/configure
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@@ -7126,8 +7126,8 @@ check_optflags -fno-signed-zeros
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if enabled lto; then
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test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
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- check_cflags -flto
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- check_ldflags -flto $cpuflags
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+ check_cflags -flto=auto
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+ check_ldflags -flto=auto $cpuflags
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disable inline_asm_direct_symbol_refs
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fi
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