[FFmpeg-devel] [PATCH] set HAVE_MMX2 in config.h

Michael Niedermayer michaelni
Wed Mar 19 04:03:13 CET 2008

On Tue, Mar 18, 2008 at 10:37:34PM -0400, Alexander Strange wrote:
> On Mar 18, 2008, at 5:57 PM, Gert Vervoort wrote:
>> Enabling HAVE_MMX2 for swscale gives an linker error on x86-64 when
>> compiling as a shared library:
>> gcc -shared -Wl,-soname,libswscale.so.0 -L"/tmp/ffmpeg"/libavutil
>> -rdynamic -export-dynamic -Wl,--warn-common -Wl,--as-needed
>> -Wl,-rpath-link,"/tmp/ffmpeg"/libavcodec
>> -Wl,-rpath-link,"/tmp/ffmpeg"/libavformat
>> -Wl,-rpath-link,"/tmp/ffmpeg"/libavutil -Wl,-Bsymbolic -o
>> libswscale.so.0 rgb2rgb.o swscale.o yuv2rgb.o -lavutil -lz -pthread -lm
>> -lamrnb -lm -lamrwb -lm -lfaac -lfaad -lmp3lame -lm   -ldl -ldl -lX11
>> -lXext
>> /usr/bin/ld: swscale.o: relocation R_X86_64_32S against `a local symbol'
>> can not be used when making a shared object; recompile with -fPIC
>> swscale.o: could not read symbols: Bad value
>> collect2: ld returned 1 exit status
>> make[1]: *** [libswscale.so.0] Error 1
>> make[1]: Leaving directory `/tmp/ffmpeg/libswscale'
>> make: *** [lib] Error 2
>> [gert at apollo ffmpeg]$
> The attached patch fixes 64-bit but breaks any system with an 
> Suggestions?

Well figure out the proper syntax for all the systems and do whatever
is needed so that it ends in there.

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

it is not once nor twice but times without number that the same ideas make
their appearance in the world. -- Aristotle
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