Correction,
neon *does* get enabled on raspberry pi 64. I accidentally used the
32-bit compiler 😅. so it is just the M1 I can't figure out how to
enable neon for.
configure --enable-cross-compile
--cross-prefix=/tk/raspberrypi/cross-pi-gcc-10.3.0-64/bin/aarch64-linux-gnu-
--arch=arm64 --target-os=linux --disable-everything --enable-pic
--enable-neon --enable-optimizations --enable-fft
Jon
On 2022-11-18 11:24, drwho wrote:
I also tried a raspberry pi build with --arch=armel and neon was
enabled....
configure --enable-cross-compile
--cross-prefix=/tk/raspberrypi/cross-pi-gcc-10.3.0-2/bin/arm-linux-gnueabihf-
--arch=armel --target-os=linux --disable-everything --enable-pic
--enable-neon --enable-optimizations --enable-fft
ARCH arm (generic)
big-endian no
runtime cpu detection yes
ARMv5TE enabled yes
ARMv6 enabled yes
ARMv6T2 enabled yes
VFP enabled yes
NEON enabled yes
but when I switch to --arch=arm64 neon gets disabled.
configure --enable-cross-compile
--cross-prefix=/tk/raspberrypi/cross-pi-gcc-10.3.0-2/bin/arm-linux-gnueabihf-
--arch=arm64 --target-os=linux --disable-everything --enable-pic
--enable-neon --enable-optimizations --enable-fft
ARCH aarch64 (generic)
big-endian no
runtime cpu detection yes
NEON enabled no
VFP enabled no
Jon
On 2022-11-17 22:36, drwho wrote:
Hello, I am trying to build ffmpeg for the Apple M1 with neon
optimizations turned on. This configure fails to enable neon or
VFP. MacOS / sdk 12.3. I've tried the release 5.1 branch and master.
./configure --arch=arm64 --disable-everything --enable-pic
--enable-neon --enable-optimizations --cpu=cortex-a8 --cc=/usr/bin/clang
C compiler /usr/bin/clang
C library
host C compiler gcc
host C library
ARCH aarch64 (cortex-a8)
big-endian no
runtime cpu detection yes
NEON enabled no
VFP enabled no
debug symbols yes
strip symbols yes
optimize for size no
optimizations yes
static yes
shared no
postprocessing support no
network support yes
threading support pthreads
safe bitstream reader yes
texi2html enabled no
perl enabled yes
pod2man enabled yes
makeinfo enabled yes
makeinfo supports HTML no
xmllint enabled yes
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