When compiling inkscape-0.48.4_8 from ports under an installation of ImageMagick w/ openmp,linking stage fails w/ the below message.

3 warnings generated.
  AR     libinkscape.a
2 warnings generated.
  CXXLD  inkscape
  CXXLD  inkview
libinkscape.a(imagemagick.o): In function `Inkscape::Extension::Internal::Bitmap::ImageMagickDocCache::readImage(char const*, Magick::Image*)':
extension/internal/bitmap/imagemagick.cpp:(.text+0x262): undefined reference to `Magick::Blob::base64(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)'
extension/internal/bitmap/imagemagick.cpp:(.text+0x2ca): undefined reference to `Magick::Image::read(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)'
libinkscape.a(imagemagick.o): In function `Inkscape::Extension::Internal::Bitmap::ImageMagickDocCache::readImage(char const*, Magick::Image*)':
extension/internal/bitmap/imagemagick.cpp:(.text+0x262): undefined reference to `Magick::Blob::base64(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)'
extension/internal/bitmap/imagemagick.cpp:(.text+0x2ca): undefined reference to `Magick::Image::read(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)'
c++: error: linker command failed with exit code 1 (use -v to see invocation)
gmake[4]: *** [inkscape] Error 1
gmake[4]: *** Waiting for unfinished jobs....
c++: error: linker command failed with exit code 1 (use -v to see invocation)
gmake[4]: *** [inkview] Error 1
gmake[4]: Leaving directory `/usr/ports/graphics/inkscape/work/inkscape-0.48.4/src'
gmake[3]: *** [all-recursive] Error 1
gmake[3]: Leaving directory `/usr/ports/graphics/inkscape/work/inkscape-0.48.4'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory `/usr/ports/graphics/inkscape/work/inkscape-0.48.4'
===> Compilation failed unexpectedly.
Try to set MAKE_JOBS_UNSAFE=yes and rebuild before reporting the failure to
the maintainer.
*** Error code 1

after deinstalling ImageMagick and installing again it w/o openmp and compile, it works fine.