microsoft / microsoft/FFmpegInterop
Link errorwhile compiling decode video application
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Description
Hi,
I have modified the doc/example/decode_video.c to start a thread using the pthread_create() call. While compiling the FFMPEG Example with this new (replaced) decode_video.c I get the link error as below:
**> $ make examples
LD doc/examples/decode_video_g.exe
decode_video.o : error LNK2019: unresolved external symbol pthread_create referenced in function main
doc/examples/decode_video_g.exe : fatal error LNK1120: 1 unresolved externals
make: *** [Makefile:108: doc/examples/decode_video_g.exe] Error 96**
I have libpthreadGC1.a and libpthreadGC2.a from Windows pthread pkg but need to understand how to include this pthread lib here to avoid this link error. Do I need to make changes to any Makefile in FFmpeg or include in config parameter?
Thanks
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Research direction
Start with doc/example/decode_video.c and the examples target around Makefile:108, then inspect how the Windows example linker inputs are configured. Reproduce make examples and trace the link command; done means the modified decode_video example links successfully without the pthread_create unresolved-symbol errors.
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Assessment
- Tech stack
- c
- Domain
- build-system
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100