mandoc build failure.

[bch <brad.harder%gmail.com@localhost>]

dependall ===> tools/groff
dependall ===> tools/mandoc
#      link  mandoc/mandoc
cc -O -DOSNAME=\"NetBSD\ 7.99\" -DHAVE_CONFIG_H -I.
-I/usr/src/obj/tooldir.NetBSD-7.99.24-amd64/include/compat
-I/usr/src/tools/compat -DHAVE_NBTOOL_CONFIG_H=1
-D_FILE_OFFSET_BITS=64   -o mandoc main.lo out.lo tree.lo eqn_html
.lo eqn_term.lo html.lo man_html.lo mdoc_html.lo tbl_html.lo
manpath.lo man_term.lo mdoc_term.lo term.lo term_ascii.lo term_ps.lo
tbl_term.lo man.lo mandoc_aux.lo man_hash.lo man_macro.lo
man_validate.lo att.lo lib.lo mdoc.lo
mdoc_argv.lo mdoc_hash.lo mdoc_macro.lo mdoc_man.lo mdoc_validate.lo
msec.lo preconv.lo st.lo eqn.lo roff.lo tbl.lo tbl_data.lo
tbl_layout.lo tbl_opts.lo mandoc.lo read.lo compat_strtonum.lo
compat_reallocarray.lo -L/usr/src/o
bj/tooldir.NetBSD-7.99.24-amd64/lib -lnbcompat -lrt -lz
main.lo: In function `main':
main.c:(.text+0x1265): undefined reference to `mchars_alloc'
main.c:(.text+0x1674): undefined reference to `mchars_free'
html.lo: In function `print_encode':
html.c:(.text+0x58c): undefined reference to `mchars_num2uc'
html.c:(.text+0x59f): undefined reference to `mchars_num2char'
html.c:(.text+0x5bd): undefined reference to `mchars_spec2cp'
term.lo: In function `term_word':
term.c:(.text+0xb12): undefined reference to `mchars_num2uc'
term.c:(.text+0xb26): undefined reference to `mchars_num2char'
term.c:(.text+0xb59): undefined reference to `mchars_spec2str'
term.c:(.text+0xb8d): undefined reference to `mchars_spec2cp'
term.lo: In function `term_strlen':
term.c:(.text+0xe10): undefined reference to `mchars_num2uc'
term.c:(.text+0xe24): undefined reference to `mchars_num2char'
term.c:(.text+0xe58): undefined reference to `mchars_spec2str'
term.c:(.text+0xe80): undefined reference to `mchars_spec2cp'
term_ascii.lo: In function `ascii_uc2str':
term_ascii.c:(.text+0x46f): undefined reference to `mchars_uc2str'
roff.lo: In function `roff_parseln':
roff.c:(.text+0x2bbb): undefined reference to `mchars_spec2cp'

*** Failed target:  mandoc
*** Failed command: cc -O -DOSNAME=\"NetBSD\ 7.99\" -DHAVE_CONFIG_H
-I. -I/usr/src/obj/tooldir.NetBSD-7.99.24-amd64/include/compat
-I/usr/src/tools/compat -DHAVE_NBTOOL_CONFIG_H=1
-D_FILE_OFFSET_BITS=64 -o mandoc main.lo out.l
o tree.lo eqn_html.lo eqn_term.lo html.lo man_html.lo mdoc_html.lo
tbl_html.lo manpath.lo man_term.lo mdoc_term.lo term.lo term_ascii.lo
term_ps.lo tbl_term.lo man.lo mandoc_aux.lo man_hash.lo man_macro.lo
man_validate.lo att.
lo lib.lo mdoc.lo mdoc_argv.lo mdoc_hash.lo mdoc_macro.lo mdoc_man.lo
mdoc_validate.lo msec.lo preconv.lo st.lo eqn.lo roff.lo tbl.lo
tbl_data.lo tbl_layout.lo tbl_opts.lo mandoc.lo read.lo
compat_strtonum.lo compat_reallocarr
ay.lo -L/usr/src/obj/tooldir.NetBSD-7.99.24-amd64/lib -lnbcompat -lrt -lz
*** Error code 1

Stop.
nbmake[6]: stopped in /usr/src/tools/mandoc

*** Failed target:  dependall
*** Failed command: cd "/usr/src/tools/mandoc";
/usr/src/obj/tooldir.NetBSD-7.99.24-amd64/bin/nbmake realall
*** Error code 1