[Ffmpeg-devel] Compiling ffmpeg as a universal shared library on Mac OS X - Need help with MMX

[Jean-Francois Roy]

Hello,

I am currently working on a Xcode 2.1 project to compile ffmpeg as a  
shared library containing 3 architectures (generic G4, G5 and generic  
i386 tuned to pentium4). Everything works nicely except the MMX  
optimizations of the i386 architecture. Since arguably I'm much more  
of a PowerPC guy and not too much of an assembly freak, so I thought  
I'd share the errors I am getting with the list see if anyone  
understands them.

A bit of info about the build environment:

gcc version: powerpc-apple-darwin8-gcc-4.0.0 (GCC) 4.0.0 (Apple  
Computer, Inc. build 5026)
Xcode tools: 2.2 dev preview 1 (Xcode IDE: 622.0, Xcode Core: 622.0,  
ToolSupport: 610.0)

I'm building straight off from CVS.

The compiler arguments look something like this for any given file  
when building for i386:

/usr/bin/gcc-4.0 -x c -arch i386 -pipe -std=gnu99 -Wno-trigraphs - 
fpascal-strings -fasm-blocks -O3 -Wreturn-type -Wno-four-char- 
constants -Wno-pointer-sign -DHAVE_AV_CONFIG_H -D_FILE_OFFSET_BITS=64  
-D_LARGEFILE_SOURCE -D_GNU_SOURCE -fmessage-length=0 -ffast-math  
<snip> -march=pentium4 -mtune=pentium4 -msse -msse2 -mfpmath=sse - 
mdynamic-no-pic -force_cpusubtype_ALL <snip> -ftree-vectorize - 
finline-functions -fobey-inline <snip> -c <snip> -o <snip>

The important parts of the i386 config.h:

#define FFMPEG_CONFIGURATION " --enable-shared --enable-pthreads -- 
disable-vhook --disable-ffserver --disable-ffplay --disable-encoders "
#define ARCH_X86 1
#define TUNECPU generic
#define HAVE_MMX 1
#define __CPU__ 586
#define HAVE_BUILTIN_VECTOR 1
#define HAVE_LOCALTIME_R 1
#define HAVE_PTHREADS 1
#define HAVE_THREADS 1
#define HAVE_LRINTF 1
#define CONFIG_ENCODERS 1
#define CONFIG_DECODERS 1
#define CONFIG_MPEGAUDIO_HP 1
#define CONFIG_HAVE_DLOPEN 1
#define CONFIG_HAVE_DLFCN 1
#define CONFIG_NETWORK 1
#define CONFIG_ZLIB 1
#define CONFIG_DARWIN 1
#undef  HAVE_MALLOC_H
#undef  HAVE_MEMALIGN
#define SIMPLE_IDCT 1
#define restrict __restrict__

Here are the errors.

fdct_mmx.c:
{standard input}:unknown:file contains unmatched .macro and .endmacro  
for: FDCT_ROW_SSE2_H1it

gcc exits with code 1.

dsputil_mmx.c:
{standard input}:92:Unknown pseudo-op: .balign
{standard input}:92:Rest of line ignored. 1st junk character valued  
56 (8).

Above repeated ad-nauseam until gcc exits with code 1.

mpegvideo_mmx.c:
{standard input}:57:Unknown pseudo-op: .balign
{standard input}:57:Rest of line ignored. 1st junk character valued  
49 (1).

Above repeated ad-nauseam until gcc exits with code 1.

motion_est_mmx.c:
{standard input}:34:Unknown pseudo-op: .balign
{standard input}:34:Rest of line ignored. 1st junk character valued  
49 (1).

Above repeated ad-nauseam until gcc exits with code 1.

simple_idct_mmx.c:
{standard input}:401:Junk character 47 (/).
{standard input}:401:Rest of line ignored. 1st junk character valued  
110 (n).

Above repeated ad-infinitum until gcc exits with code 1.

Everything else is fine, and the 2 Power PC architectures build just  
fine as well. Also, if I disable the MMX and native vector defines in  
the i386 config.h and remove the i386 files from compilation, the  
i386 architecture builds fine.

Ideas, thoughts, comments, fixes, questions?

Best regards,
Jean-Francois Roy

--
Co-Founder of MacStorm
Programmer at MacStorm

http://www.macstorm.org
http://www.devklog.net
bahamut at macstorm.org

http://www.macstorm.org/bahamut/Jean-Francois.gpgkey


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