A continuing problem for GraphicsMagick users has been that there is a
lot of existing software which is hard-coded to use ImageMagick
utilities (e.g. "convert", "mogrify", and "montage") but
GraphicsMagick has provided 'gm' and it was up to the user to invent a
way to execute GraphicsMagick with the right options.
To resolve this problem, GraphicsMagick 1.1.1 and 1.2 will provide the
--enable-magick-compat configure option (default disabled) so that if
a user chooses to use GraphicsMagick rather than ImageMagick, symbolic
links may be created at install time to create a set of utilities
which precisely emulate the command line behavior of ImageMagick 5.5.2
(upon which GraphicsMagick is originally based). Take care when using
this option because if an existing ImageMagick install resides in the
directory where GraphicsMagick is being installed, its utilities will
be replaced by GraphicsMagick's versions.