Error when compiling screen, target arm-none-eabi

[hippy dave]

and now i just need to choose which virtualisation software (i have vmware installed from using windows ages ago, i guess i'd prefer whichever is faster/less resource-abusing), and which linux distro (pre-installed vm image i guess)

[twobob]

I vote linux mint.

[hippy dave]

sounds fresh!

[twobob]

it's a breeze to install.

put in disc (.img file, whatever).
boot,
click install mint icon on desktop. (follow BASIC instructions)

reboot.

done. awesome

[ppoo]

I found tmux here. Thank for suggesting.

[knc1]

Originally Posted by ppoo

I found tmux here. Thank for suggesting.

Bookmark that one for the Kpw.

[ppoo]

I got error when compiling ffmpeg. I have liblto_plugin.so but don't no where to put it correctly. Anyone knows?

/root/sbox2/x-tools.old/arm-cortex_a8-linux-gnueabi/arm-cortex_a8-linux-gnueabi/bin/gcc --sysroot=/root/sbox2/devel/ -o /tmp/ffconf.cydVvzUn /tmp/ffconf.D3vmDeXQ.o
gcc: fatal error: -fuse-linker-plugin, but liblto_plugin.so not found
compilation terminated.
C compiler test failed.

[knc1]

Originally Posted by ppoo

I got error when compiling ffmpeg. I have liblto_plugin.so but don't no where to put it correctly. Anyone knows?

/root/sbox2/x-tools.old/arm-cortex_a8-linux-gnueabi/arm-cortex_a8-linux-gnueabi/bin/gcc --sysroot=/root/sbox2/devel/ -o /tmp/ffconf.cydVvzUn /tmp/ffconf.D3vmDeXQ.o
gcc: fatal error: -fuse-linker-plugin, but liblto_plugin.so not found
compilation terminated.
C compiler test failed.

Your build system is not configured to execute ARM code, so all tests of generated code will fail.

Either disable that bit of test code, or
Do the build with scratchbox2, or
Fix the build system so it can execute ARM code.
(Some distros come that way, others by installing qemu-kvm and qemu-kvm-extras will do the setup for you, for others, your on your own. Since scratchbox2 requires qemu-and-friends to be installed, start with that if you can't by-pass the code test.)

[ppoo]

@knc: I've built with scratchbox2 ( type sb2 then ./configure ). I'm also gcc simple hello world program and use. My test result below:

[SB2 simple armhf] root@ppoo-VPCEH15FX devel $ readelf -A a.out 
Attribute Section: aeabi
File Attributes
  Tag_CPU_name: "Cortex-A8"
  Tag_CPU_arch: v7
  Tag_CPU_arch_profile: Application
  Tag_ARM_ISA_use: Yes
  Tag_THUMB_ISA_use: Thumb-2
  Tag_FP_arch: VFPv3
  Tag_Advanced_SIMD_arch: NEONv1
  Tag_ABI_PCS_wchar_t: 4
  Tag_ABI_FP_denormal: Needed
  Tag_ABI_FP_exceptions: Needed
  Tag_ABI_FP_number_model: IEEE 754
  Tag_ABI_align_needed: 8-byte
  Tag_ABI_align_preserved: 8-byte, except leaf SP
  Tag_ABI_enum_size: int
  Tag_ABI_HardFP_use: SP and DP
  Tag_ABI_VFP_args: VFP registers
  Tag_CPU_unaligned_access: v6
  Tag_DIV_use: Not allowed
  Tag_Virtualization_use: TrustZone
[SB2 simple armhf] root@ppoo-VPCEH15FX devel $ ./a.out
hello world[SB2 simple armhf] root@ppoo-VPCEH15FX devel $

[geekmaster]

I have a full static build of ffmpeg with all the options enabled (except ALSA sound, which was removed so that I could get it to compile). I thought I published in my "geekmaster kindle video player" thread. I have more than 4000 posts here -- hard to remember them all...

I was successfully able to play 1080p movies (with sound) on my K5 by using ffmpeg to play the network stream from the blender site, with video output piped to raw2gmv|gmplay, and another ffmpeg playing the same stream (in the background), with audio output piped to aplay.

I tested it on DX/DXG/K3/K4/K5. The K4/K5 can simultaneously transcode 1080p and play it smoothly, but on a K3 I had to transcode on a host PC and pipe that to the K3 with netcat (nc), or pre-encode it as a .gmv.gz file.

EDIT: I cannot find where I posted ffmpeg -- did I? Perhaps I did not get around to it yet. "Round tuits" are rare and easily misplaced.

[knc1]

@ppoo : That is a hard float configuration, switch to soft float for compat. with Kindle.

[ppoo]

I think it's ok to compile it with hard float configuration, like ./mplayer ( I usually run it and it run well ). I want to figure how to fix that error.

[SB2 simple armhf] root@ppoo-VPCEH15FX ~ $ readelf -A ./mplayer 
Attribute Section: aeabi
File Attributes
  Tag_CPU_name: "7-A"
  Tag_CPU_arch: v7
  Tag_CPU_arch_profile: Application
  Tag_ARM_ISA_use: Yes
  Tag_THUMB_ISA_use: Thumb-2
  Tag_FP_arch: VFPv3
  Tag_Advanced_SIMD_arch: NEONv1
  Tag_ABI_PCS_wchar_t: 4
  Tag_ABI_FP_denormal: Needed
  Tag_ABI_FP_exceptions: Needed
  Tag_ABI_FP_number_model: IEEE 754
  Tag_ABI_align_needed: 8-byte
  Tag_ABI_enum_size: int
  Tag_ABI_HardFP_use: SP and DP
  Tag_CPU_unaligned_access: v6

[NiLuJe]

@ppoo: I'd also recommend against both a hardfloat & LTO TC. The Kindle system uses a softfp TC, so there's a chance things'll go kablooey somewhere, and I've had numerous ugly runtime breakage with LTO in the past (on ARM)... (And the very bad kind of breakage: bad code generation, not a nice & tidy segfault).

(Well, you *can* enable LTO support in your GCC config, just don't use it [-fuse-linker-plugin is used in conjuction with LTO]).

[ppoo]

@NiLuJe,knc1: I'll try again.
I've used cross-ng with CFLAGS:--with-float=softfp --with-fpu=neon both for GCC and Lib. It pass Installing C library headers & start files but get errors when Installing pass-2 core C compiler, with error like that:

[ERROR]  ./crosstool-ng-1.16.0/.build/arm-cortex_a8-linux-gnueabi/buildtools/arm-cortex_a8-linux-gnueabi/bin/ld: error: ./libgcc_s.so.1.tmp uses VFP register arguments, _muldi3_s.o does not

Here is my config file in detail:

ARCH_CPU=cortex-a8
CT_ARCH_FPU=neon
ARCH_SUPPORT_WITH_FLOAT: hardware(FPU)
CT_TARGET_CFLAGS= -mfloat-abi=softfp -mfpu=neon
Linux kernel version : 2.6.31.14
binutils version : 2.22
CT_BINUTILS_PLUGINS: enable
gcc version linaro-4.6-2012.07
Core gcc extra config, gcc extra config: --with-float=softfp --with-fpu=neon
(the same with Library's extra target flags and gcc extra flags

What's the best TC for Kindle?

I've got it, ARCH_SUPPORT_WITH_FLOAT should be softfp

[ppoo]

How to disable LTO ?