Kem-Templetons-MacBook-Pro:~ Kem$ sudo port uninstall ghostscript
--->  Unable to uninstall ghostscript @8.64_3, the following ports depend on it:
--->  	ImageMagick @6.5.4-0_0+graphviz+gs+jbig+jpeg2+lcms+q16+wmf
Error: port uninstall failed: Please uninstall the ports that depend on ghostscript first.
Kem-Templetons-MacBook-Pro:~ Kem$ sudo port uninstall ImageMagick
--->  Deactivating ImageMagick @6.5.4-0_0+graphviz+gs+jbig+jpeg2+lcms+q16+wmf
--->  Uninstalling ImageMagick @6.5.4-0_0+graphviz+gs+jbig+jpeg2+lcms+q16+wmf
Kem-Templetons-MacBook-Pro:~ Kem$ sudo port uninstall ghostscript
--->  Deactivating ghostscript @8.64_3
--->  Uninstalling ghostscript @8.64_3
Kem-Templetons-MacBook-Pro:~ Kem$ sudo port install ghostscript
--->  Building libffi
Error: Target org.macports.build returned: shell command failed (see log for details)
Log for libffi is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_libffi/libffi/main.log
Error: Problem while installing libffi
Error: Unable to execute port: upgrade pkgconfig failed
To report a bug, see <http://guide.macports.org/#project.tickets>