[Ffmpeg-devel] Compiling with --enable-pthreads on mingw32

[Ahmad Zaidee bin Abu]

Hello expert,
 
I configure ffmpeg check out from cvs today with pthreads support.
./configure --enable-shared --enable-memalign-hack --enable-mp3lame --enable-pthreads --extra-cflags=-I/usr/local/include --extra-ldflags="-L/usr/local/lib"
 
When compiled, error as below appears.
 
gcc -shared -Wl,-soname,avcodec.dll.51 -Wl,--output-def,avcodec.def -o avcodec.dll bitstream.o utils.o mem.o allcodecs.o mpegvideo.o jrevdct.o jfdctfst.o jfdctint.o mpegaudio.o ac3enc.o mjpeg.o resample.o resample2.o dsputil.o motion_est.o imgconvert.o imgresample.o mpeg12.o mpegaudiodec.o pcm.o simple_idct.o ratecontrol.o adpcm.o eval.o error_resilience.o fft.o mdct.o raw.o golomb.o cabac.o dpcm.o adx.o faandct.o parser.o g726.o vp3dsp.o h264idct.o rangecoder.o pnm.o h263.o msmpeg4.o h263dec.o opt.o aasc.o alac.o asv1.o cinepak.o cook.o cljr.o cyuv.o dvbsubdec.o dvbsub.o dvdsub.o dvdsubenc.o dv.o 8bps.o ffv1.o flac.o flicvideo.o 4xm.o fraps.o h261.o h264.o huffyuv.o idcinvideo.o indeo2.o indeo3.o interplayvideo.o lcl.o loco.o mace.o msrle.o msvideo1.o png.o qdm2.o qdrw.o qpeg.o qtrle.o ra144.o ra288.o roqvideo.o rpza.o rv10.o shorten.o smc.o snow.o sonic.o svq1.o truemotion1.o truemotion2.o tscc.o ulti.o vc9.o vcr1.o vmdav.o vorbis.o vp3.o vqavideo.o wmadec.o wnv1.o ws-snd1.o xan.o xl.o bmp.o pthread.o w32thread.o  mp3lameaudio.o i386/fdct_mmx.o i386/cputest.o i386/dsputil_mmx.o i386/mpegvideo_mmx.o i386/idct_mmx.o i386/motion_est_mmx.o i386/simple_idct_mmx.o i386/fft_sse.o i386/vp3dsp_mmx.o i386/vp3dsp_sse2.o  -lm -lmp3lame -lpthread -L../libavutil -lavutil 
w32thread.o(.text+0x70): In function `avcodec_thread_free':
C:/msys/1.0/home/Fazdliana/ffmpeg-cvs-2005-12-16/libavcodec/w32thread.c:61: multiple definition of `avcodec_thread_free'
pthread.o(.text+0x100):C:/msys/1.0/home/Fazdliana/ffmpeg-cvs-2005-12-16/libavcodec/pthread.c:84: first defined here
w32thread.o(.text+0x160): In function `avcodec_thread_execute':
C:/msys/1.0/home/Fazdliana/ffmpeg-cvs-2005-12-16/libavcodec/w32thread.c:77: multiple definition of `avcodec_thread_execute'
pthread.o(.text+0x1c0):C:/msys/1.0/home/Fazdliana/ffmpeg-cvs-2005-12-16/libavcodec/pthread.c:104: first defined here
w32thread.o(.text+0x250): In function `avcodec_thread_init':
C:/msys/1.0/home/Fazdliana/ffmpeg-cvs-2005-12-16/libavcodec/w32thread.c:102: multiple definition of `avcodec_thread_init'
pthread.o(.text+0x260):C:/msys/1.0/home/Fazdliana/ffmpeg-cvs-2005-12-16/libavcodec/pthread.c:132: first defined here
collect2: ld returned 1 exit status
make[1]: *** [avcodec.dll] Error 1
make[1]: Leaving directory `/home/Fazdliana/ffmpeg-cvs-2005-12-16/libavcodec'
make: *** [lib] Error 2
 
Is there any bug which cause the problem?
My mingw32 is on Windows platform with Minimal System (MSYS).
 
I was able to compile it when i edit config.mak and edit  HAVE_W32THREADS=no
 
Thanks.
_____________________________________
Ahmad Zaidee Abu
Senior Assistant Reseacher
Dip., Bach. Eng. (Tele), MIEEE.
Multimedia Communication Unit
Telekom Research & Development
UPM-MTDC Inc. Center One
Serdang, Selangor
Tel: +603 89441862
Fax: +603 89441822
 


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