[MPlayer-dev-eng] libswscale with -fPIC

[Jason Tackaberry]

I am attempting to build libswscale as a shared library, and have made a
number of changes so that it compiles with -fPIC.  Presently I have it
compiling on both x86 and x86_64 (with the exception of MMX2 fast
bilinear upscaling, for now), but I'm having troubles building the
shared library on x84_64:

cc -c -I../libvo -I../../libvo -I/usr/X11R6/include -O4 -march=k8
-mtune=k8 -pipe -ffast-math -fomit-frame-pointer -D_REENTRANT
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64   -I. -I..  -I.. -fPIC -dPIC
-o swscale.o swscale.c
cc -c -I../libvo -I../../libvo -I/usr/X11R6/include -O4 -march=k8
-mtune=k8 -pipe -ffast-math -fomit-frame-pointer -D_REENTRANT
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64   -I. -I..  -I.. -fPIC -dPIC
-o rgb2rgb.o rgb2rgb.c
cc -c -I../libvo -I../../libvo -I/usr/X11R6/include -O4 -march=k8
-mtune=k8 -pipe -ffast-math -fomit-frame-pointer -D_REENTRANT
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64   -I. -I..  -I.. -fPIC -dPIC
-o yuv2rgb.o yuv2rgb.c
cc -fPIC -dPIC -shared swscale.o rgb2rgb.o yuv2rgb.o -o libswscale.so
/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: *** [libswscale.so] Error 1

"a local symbol" doesn't much help with troubleshooting.  Would anyone
here have any suggestions as to what the problem might be?

Thanks,
Jason.
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