error: invalid operand in inline asm: 'adds $1, ${2:R}, ${2:Q}, lsr #31

[hsleedevelop]

CC libavcodec/audioconvert.o
error: invalid operand in inline asm: 'adds $1, ${2:R}, ${2:Q}, lsr #31
mvnne $1, #1<<31
eorne $0, $1, ${2:R}, asr #31
'
make: *** [libavcodec/audioconvert.o] Error 1

iOS5 sdk, LION-10.7.2

[hsleedevelop]

using LLVM-GCC4.2 compiler,,

[wobbals]

For those who came here via google:
http://stackoverflow.com/questions/7874667/trying-to-compile-last-ffmpeg-iphone-error-invalid-operand-in-inline-asm

[shengbinmeng]

I now have exactly the same problem!
evercry, have you figured it out? I'll appreciate it if you share your solution.
I googled, but found no answer.

[wobbals]

Edwin- have you tried disabling asm support when configuring ffmpeg? This was sufficient to solve the issue for me, and the ffmpeg libraries still work fine without it.

[shengbinmeng]

Thank you, wobbles, disabling asm does work fine. But I should mention that I want to use NEON optimization of ffmpeg, so if disable-asm, the neon support is not possible.

Hi Edwin, any luck with this issue ?

I have also the same problem with Lion and iOS 5.0.

Looking for fix ....

[shengbinmeng]

Well, just for a quick work, I did this:

1. find the error source, that is "av_clipl_int32_arm" in libavutil/arm/intmath.h;
2. avoid it. (I simply comment out "#define av_clipl_int32 av_clipl_int32_arm", so don't use NEON for just that one function)

Hope to know a more professional fix :-)

Hi Edwin,

Thanks for the fix. That error gone away but unfortunately, I got another error,

libavformat/asfcrypt.o
error: invalid operand in inline asm: 'ldr ${0:Q}, $1
ldr ${0:R}, $2

What is the ffmpeg version you are using ?

Thanks

[shengbinmeng]

I am using kind of old version - 0.6.1, and have disabled a lot of encoders/decoders (in my application).

Anyway, what I did is only "扬汤止沸", we may all need a better fix.

Yes, we may need a proper fix.

If you don't mind, can I have the ffmpeg configure command options that you are using at terminal ?

I also don't want a lot of encoders and decoders.

Thanks,

[shengbinmeng]

It should be all right. myconfig.sh:

#!/bin/bash

./configure
--disable-doc
--disable-ffmpeg
--disable-ffplay
--disable-ffprobe
--disable-ffserver
--disable-avdevice
--disable-avfilter

--disable-everything
--enable-decoder=h264
--enable-decoder=mp3
--enable-decoder=mp2
--enable-decoder=mpegaudio
--enable-parser=h264
--enable-parser=mpegaudio
--enable-demuxer=h264
--enable-demuxer=rtsp
--enable-demuxer=rtp
--enable-protocol=rtsp
--enable-protocol=rtp
--enable-protocol=udp
--enable-protocol=tcp

--enable-cross-compile
--arch=arm
--target-os=darwin
--cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc
--as="gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc"
--sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk
--extra-cflags="-w -arch armv7 -mfpu=neon "
--extra-ldflags="-arch armv7 -mfpu=neon -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk"
--enable-pic \

Thanks A lot :)

Hi Edwin,

Have you built librtmp with ffmpeg and arm ?

I am having trouble with building ffmpeg with librtmp :(

I am always getting "librtmp" not found. I set the PKG_PATH to point librtmp.c but no luck.

any Idea ?

Thanks

[shengbinmeng]

No, I know little about using librtmp.
I googled and it seems some one has the similar problem with you. you can go do more searching.

Good luck!

[lu-zero]

a workaround landed libav already http://git.libav.org/?p=libav.git;a=commit;h=f7de52354fe15ba7cae141b44ffdd01e560f0e47