[x264-devel] [bug] asm operand has impossible constraints (x86)

[Johannes Dewender]

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Hello x264 devs,


when compiling the 32 bit package of libx264 (on a 64 bit machine) I
get (current git master):

yasm -I. -I. -DARCH_X86_64=0 -I./common/x86/ -f elf32 -Worphan-labels
- -DSTACK_ALIGNMENT=32 -DPIC -DHIGH_BIT_DEPTH=0 -DBIT_DEPTH=8 -o
common/x86/pixel-32.o common/x86/pixel-32.asm
In file included from ./common/common.h:1014:0,
                 from encoder/me.c:28:
encoder/me.c: In function 'x264_me_search_ref':
./common/x86/util.h:130:5: error: 'asm' operand has impossible constrain
ts
     asm(
      ^
./common/x86/util.h:193:5: error: 'asm' operand has impossible constrain
ts
     asm(
      ^
<builtin>: recipe for target 'encoder/me.o' failed

The problem appears in building the Arch Linux 32 bit package
"lib32-libx264":
https://aur.archlinux.org/packages/lib32-libx264/

Built on a 64 bit machine with:
./configure --prefix=/usr --libdir=/usr/lib32 --host=i686-linux-gnu \
        --enable-shared \
        --enable-pic
make

The 64 bit build runs fine on the same machine, but that isn't using
files out of common/x86/, I guess.

Arch Linux always ships the newest (stable) versions of all software
so the problem is probably related to a new version of important build
tools.
However, I couldn't pinpoint the exact update generating the problem.

The complete build log is in
https://gist.github.com/JonnyJD/6aa13527e8b98055a1d0

This is the list of packages and versions updated (breaking the build):
https://gist.github.com/JonnyJD/22b65e6101d0e971ee4d
(It worked before the Arch Linux update)

I can't tell if that is a bug in the build tools or in x264 and I
don't have pratical experience in assembler.


Thanks
JonnyJD


PS:
I originally reported this at https://trac.videolan.org/vlc/ticket/15226
(closed as you guys don't seem to use trac)
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