Just adding the .fncs versions doesn't get these files generated.
DOC_FUNCS_SGML=\
fcatomic.sgml \
fcblanks.sgml \
DOC_FUNCS_SGML=\
fcatomic.sgml \
fcblanks.sgml \
fccharset.sgml \
fcconfig.sgml \
fcconstant.sgml \
fccharset.sgml \
fcconfig.sgml \
fcconstant.sgml \
fcfile.sgml \
fcfontset.sgml \
fcfreetype.sgml \
fcinit.sgml \
fcfile.sgml \
fcfontset.sgml \
fcfreetype.sgml \
fcinit.sgml \
fcmatrix.sgml \
fcobjectset.sgml \
fcobjecttype.sgml \
fcmatrix.sgml \
fcobjectset.sgml \
fcobjecttype.sgml \