BUG: Problem linking motion with ffmpeg svn

Hi, I downloaded motion 3.2.11 and the ffmpeg svn version from the motion website. I successfully built both of them, no extra parms added during configure and make for both packages. This did not work quite 100%, motion was OK, but anything using ffmeg did not work. No error messages issued at all.

So I was trying to make motion again and all I ever get now is the error msg shown below. I did try the following before the second make attempt:

Open the file /etc/ld.so.conf in your favorite text editor. /usr/local/lib Run the command ldconfig.

Later I took that line out and ran ldconfig again. Did make clean, configure, make, but same problem. Currently I cannot seem to determine what the parm -lz actually does, still looking, so I am a bit stuck.

OK got a bit further:

Slug1-T find / -name libz.*
/usr/lib/libz.so.1
/usr/lib/libz.so.1.2.3.3

Slug1-T find / -name libm.*
/lib/libm.so.6
/usr/lib/libm.a
/usr/lib/libm.so

Seems I am missing libz.a. Is that correct?

Cheers Brian

Linking Motion...
--------------------------------------------------------------------------------
gcc -L/usr/local/lib -o motion motion.o conf.o draw.o jpegutils.o video.o video2.o video_common.o netcam.o netcam_ftp.o netcam_jpeg.o netcam_wget.o track.o alg.o event.o picture.o rotate.o webhttpd.o webcam.o ffmpeg.o -lm  -lz -lpthread -ljpeg -L/usr/local/lib -lavformat -lavcodec -lavutil
/usr/bin/ld: cannot find -lz
collect2: ld returned 1 exit status
make: *** [motion] Error 1

Environment

Motion version:	3.2.11
ffmpeg version:	...ocal/src/ffmpeg/ff-mpeg-cvs-20060306-motion/ffmpegv>
Shared libraries:	ffmpeg
Server OS:	2.6.26-1-ixp4xx

-- BrianDorling - 08 Mar 2009

Follow up

Fix record

It's not a bug your system has not installed good shared libraries

find /usr/lib -name libz.*
/usr/lib/libz.so.1
/usr/lib/libz.so.1.2.3.3
/usr/lib/libz.a
/usr/lib/libz.so

probably your missed zlib1g-dev ( sudo apt-get install zlib1g-dev )

Please read the guide , it's documented which packages are needed.

-- AngelCarpintero - 09 Mar 2009