Re: [Mjpeg-developer] undefined reference in libmpeg2encpp.so

[Steven M. S. <sms@2BSD.COM>]

On Thu, 13 Jul 2006, Marcel Unbehaun wrote:

> When trying to build mjpegtools from CVS (from today) I unfortunately get
> an unresolved reference within libmpeg2encpp.so:
> 
> gcc -maltivec -mabi=altivec -mtune=powerpc -mcpu=7400 -ftree-vectorize -fomit-frame-pointer -fno-strict-aliasing -funroll-loops -ftree-loop-im -fivopts -ffast-math -pthread -DHAVE_ALTIVEC_H=1 -maltivec -mabi=altivec -Wall -Wunused -o .libs/mjpeg_simd_helper mjpeg_simd_helper.o  ../utils/.libs/libmjpegutils.so ../mpeg2enc/.libs/libmpeg2encpp.so -lm
> ../mpeg2enc/.libs/libmpeg2encpp.so: undefined reference to `ImagePlanes::ImagePlanes(EncoderParams&)'
> ../mpeg2enc/.libs/libmpeg2encpp.so: undefined reference to `ImagePlanes::~ImagePlanes()'
> collect2: ld returned 1 exit status

> Linux localhost 2.6.17.3-emedia #3 PREEMPT Sat Jul 1 18:35:57 CEST 2006 ppc 7447/7457, altivec supported CHRP Pegasos2 GNU/Linux
> 
> How can I help to fix this problem?

	Run OS/X on PPC? :)  It seems that OS/X's linker is more forgiving
	than GNU/Linux <g> - I wasn't able to reproduce the problem on my PPC
	system.  

	The problem appears to be that imageplanes.cc was added to
	mpeg2enc_SOURCES instead of being added to libmpeg2encpp_la_SOURCES.

	This is incorrect and has, as of 5 minutes ago, been fixed.

	Try a 'cvs update' followed by ./autogen.sh (mpeg2enc/Makefile.am was 
	changed).  Try it and please report if the problem still happens.

	Cheers,
	Steven Schultz