Created attachment 208610 [details]
devel/libffcall is currently a BUILD_DEPEND of lang/clisp, which suggests that it can be removed after the build. 'pkg autoremove' also lists libffcall as a package which can be removed. However, if you really remove libffcall, clisp will fail to run and 'pkg check' will complain there is a missing dependency.
ld-elf.so.1: Shared object "libffcall.so.0" not found, required by "lisp.run"
# pkg check -dn clisp
Checking clisp: 100%
clisp is missing a required shared library: libffcall.so.0
Fix it by adding devel/libffcall to LIB_DEPENDS.