unable to build head - iconv issues

uname -a:  FreeBSD develop 12.0-CURRENT FreeBSD 12.0-CURRENT #0
r329949: Sat Feb 24 07:58:23 UTC 2018
eax_at_fasteagle:/srv/obj/fbsd/head/srv/src/fbsd/head/amd64.amd64/sys/GENERIC
 amd64

src-env.conf:

MAKEOBJDIRPREFIX=/srv/obj

src.conf:

MALLOC_PRODUCTION=yes
WITHOUT_SVNLITE=true

version: head:330309

∴make buildworld
...
===> bin/csh (all)
cc -target x86_64-unknown-freebsd12.0
--sysroot=/srv/obj/srv/src/fbsd/head/tmp
-B/srv/obj/srv/src/fbsd/head/tmp/usr/bin -O2 -pipe -I.
-I/srv/src/fbsd/head/bin
/csh -I/srv/src/fbsd/head/contrib/tcsh -D_PATH_TCSHELL='"/bin/csh"'
-DHAVE_ICONV -g -std=gnu99 -fstack-protector-strong -Wsystem-headers
-Werror -Wno-pointer-
sign -Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable
-Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality
-Wno-unused-functio
n -Wno-enum-conversion -Wno-unused-local-typedef
-Wno-address-of-packed-member -Wno-switch -Wno-switch-enum
-Wno-knr-promoted-parameter -Wno-parentheses -Qunu
sed-arguments  -o csh.full sh.o sh.dir.o sh.dol.o sh.err.o sh.exec.o
sh.char.o sh.exp.o sh.file.o sh.func.o sh.glob.o sh.hist.o sh.init.o
sh.lex.o sh.misc.o s
h.parse.o sh.print.o sh.proc.o sh.sem.o sh.set.o sh.time.o glob.o
mi.termios.o tw.help.o tw.init.o tw.parse.o tw.spell.o tw.comp.o
tw.color.o ed.chared.o ed.d
efns.o ed.init.o ed.inputl.o ed.refresh.o ed.screen.o ed.xmap.o
ed.term.o tc.alloc.o tc.bind.o tc.const.o tc.disc.o tc.func.o tc.nls.o
tc.os.o tc.printf.o tc.
prompt.o tc.sched.o tc.sig.o tc.str.o tc.vers.o tc.who.o dotlock.o
tc.defs.o   -ltermcapw  -lcrypt
/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.c:1275 (/srv/src/fbsd/head/contrib/tcsh/sh.c:1275)
>>>               sh.o:(main)

/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.c:1278 (/srv/src/fbsd/head/contrib/tcsh/sh.c:1278)
>>>               sh.o:(main)

/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.c:896 (/srv/src/fbsd/head/contrib/tcsh/sh.c:896)
>>>               sh.o:(main)

/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.c:2306 (/srv/src/fbsd/head/contrib/tcsh/sh.c:2306)
>>>               sh.o:(process)

/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.c:2322 (/srv/src/fbsd/head/contrib/tcsh/sh.c:2322)
>>>               sh.o:(process)

/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.c:2324 (/srv/src/fbsd/head/contrib/tcsh/sh.c:2324)
>>>               sh.o:(process)

/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.c:2309 (/srv/src/fbsd/head/contrib/tcsh/sh.c:2309)
>>>               sh.o:(process)

/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.c:2319 (/srv/src/fbsd/head/contrib/tcsh/sh.c:2319)
>>>               sh.o:(process)

/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.dir.c:93 (/srv/src/fbsd/head/contrib/tcsh/sh.dir.c:93)
>>>               sh.dir.o:(dinit)

/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.dir.c:93 (/srv/src/fbsd/head/contrib/tcsh/sh.dir.c:93)
>>>               sh.dir.o:(dinit)

/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.err.c:210 (/srv/src/fbsd/head/contrib/tcsh/sh.err.c:210)
>>>               sh.err.o:(errinit)

/srv/obj/srv/src/fbsd/head/tmp/usr/bin/ld: error: undefined symbol:
iconv_catgets
>>> referenced by sh.err.c:214 (/srv/src/fbsd/head/contrib/tcsh/sh.err.c:214)
>>>               sh.err.o:(errinit)

any ideas on how to fix this?


-- 
Eitan Adler