libMagick -compile error

[Vizion]

can anyone tell me how to deal with this..

Thanks in advance..

How does one find the source of a missing library?
In this case the error is 'cannot find -lgvc'
Where can I look up to find what I need to install??
thanks

David

mv -f coders/.deps/coders_dib_la-dib.Tpo coders/.deps/coders_dib_la-dib.Plo
/bin/sh /usr/local/bin/libtool --silent --tag=CC   --mode=link 
cc  -O2 -fno-strict-aliasing -pipe  -no-undefined -module -avoid-version -L/usr/local/lib -L/usr/X11R6/lib -R/usr/X11R6/lib -L/usr/local/lib -Wl,--rpath -Wl,/usr/local/lib -lfreetype -lz -L/usr/local/lib -o 
coders/dib.la -rpath /usr/local/lib/ImageMagick/modules-Q16/coders 
coders/coders_dib_la-dib.lo magick/libMagick.la
/bin/sh /usr/local/bin/libtool --silent --tag=CC   --mode=compile 
cc -DHAVE_CONFIG_H -I. -I./magick -I./wand   -I/usr/local/include/graphviz   -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include -I/usr/X11R6/include -I/usr/local/include/libxml2  -O2 -fno-strict-aliasing -pipe  -MT 
coders/coders_dot_la-dot.lo -MD -MP -MF 
coders/.deps/coders_dot_la-dot.Tpo -c -o coders/coders_dot_la-dot.lo 
`test -f 'coders/dot.c' || echo './'`coders/dot.c
mv -f coders/.deps/coders_dot_la-dot.Tpo coders/.deps/coders_dot_la-dot.Plo
/bin/sh /usr/local/bin/libtool --silent --tag=CC   --mode=link 
cc  -O2 -fno-strict-aliasing -pipe  -no-undefined -module -avoid-version -L/usr/local/lib -L/usr/X11R6/lib -R/usr/X11R6/lib -L/usr/local/lib -Wl,--rpath -Wl,/usr/local/lib -lfreetype -lz -L/usr/local/lib -o 
coders/dot.la -rpath /usr/local/lib/ImageMagick/modules-Q16/coders 
coders/coders_dot_la-dot.lo magick/libMagick.la -L/usr/local/lib -lgvc
/usr/bin/ld: cannot find -lgvc
gmake: *** [coders/dot.la] Error 1
*** Error code 2

Stop in /usr/ports/graphics/ImageMagick.
** Command failed [exit code 1]: /usr/bin/script -qa /tmp/portupgrade.24830.14 
env UPGRADE_TOOL=portupgrade UPGRADE_PORT=ImageMagick-6.2.9.8 
UPGRADE_PORT_VER=6.2.9.8 make
** Fix the problem and try again.