www/dillo2 doesn't build and returns with the errors bellow

REENTRANT -D_THREAD_SAFE -Wall -W -Wno-unused-parameter -Waggregate-return -MT gif.o -MD -MP -MF .deps/gif.Tpo -c -o gif.o gif.c
mv -f .deps/dns.Tpo .deps/dns.Po
cc -DHAVE_CONFIG_H -I. -I..  -I.. -DDILLO_SYSCONF='"/usr/local/etc/dillo/"' -DDILLO_DOCDIR='"/usr/local/share/doc/dillo/"'  -I/usr/local/include -I/usr/local/include/libpng15 -O2 -pipe -fno-strict-aliasing -DENABLE_IPV6 -DD_DNS_THREADED -D_REENTRANT -D_THREAD_SAFE -Wall -W -Wno-unused-parameter -Waggregate-return -MT jpeg.o -MD -MP -MF .deps/jpeg.Tpo -c -o jpeg.o jpeg.c
mv -f .deps/jpeg.Tpo .deps/jpeg.Po
cc -DHAVE_CONFIG_H -I. -I..  -I.. -DDILLO_SYSCONF='"/usr/local/etc/dillo/"' -DDILLO_DOCDIR='"/usr/local/share/doc/dillo/"'  -I/usr/local/include -I/usr/local/include/libpng15 -O2 -pipe -fno-strict-aliasing -DENABLE_IPV6 -DD_DNS_THREADED -D_REENTRANT -D_THREAD_SAFE -Wall -W -Wno-unused-parameter -Waggregate-return -MT png.o -MD -MP -MF .deps/png.Tpo -c -o png.o png.c
mv -f .deps/png.Tpo .deps/png.Po
c++ -DHAVE_CONFIG_H -I. -I..  -I.. -DDILLO_SYSCONF='"/usr/local/etc/dillo/"' -DDILLO_DOCDIR='"/usr/local/share/doc/dillo/"'  -I/usr/local/include -I/usr/local/include/libpng15 -I/usr/local/include -I/usr/local/include/freetype2 -O2 -pipe -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_THREAD_SAFE -D_REENTRANT -O2 -pipe -fno-strict-aliasing -Wall -W -Wno-unused-parameter -fno-rtti -fno-exceptions -MT imgbuf.o -MD -MP -MF .deps/imgbuf.Tpo -c -o imgbuf.o imgbuf.cc
mv -f .deps/imgbuf.Tpo .deps/imgbuf.Po
c++ -DHAVE_CONFIG_H -I. -I..  -I.. -DDILLO_SYSCONF='"/usr/local/etc/dillo/"' -DD
ILLO_DOCDIR='"/usr/local/share/doc/dillo/"'  -I/usr/local/include -I/usr/local/include/libpng15 -I/usr/local/include -I/usr/local/include/freetype2 -O2 -pipe -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_THREAD_SAFE -D_REENTRANT -O2 -pipe -fno-strict-aliasing -Wall -W -Wno-unused-parameter -fno-rtti -fno-exceptions -MT image.o -MD -MP -MF .deps/image.Tpo -c -o image.o image.cc
mv -f .deps/gif.Tpo .deps/gif.Po
c++ -DHAVE_CONFIG_H -I. -I..  -I.. -DDILLO_SYSCONF='"/usr/local/etc/dillo/"' -DDILLO_DOCDIR='"/usr/local/share/doc/dillo/"'  -I/usr/local/include -I/usr/local/include/libpng15 -I/usr/local/include -I/usr/local/include/freetype2 -O2 -pipe -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_THREAD_SAFE -D_REENTRANT -O2 -pipe -fno-strict-aliasing -Wall -W -Wno-unused-parameter -fno-rtti -fno-exceptions -MT menu.o -MD -MP -MF .deps/menu.Tpo -c -o menu.o menu.cc
mv -f .deps/image.Tpo .deps/image.Po
cc -DHAVE_CONFIG_H -I. -I..  -I.. -DDILLO_SYSCONF='"/usr/local/etc/dillo/"' -DDILLO_DOCDIR='"/usr/local/share/doc/dillo/"'  -I/usr/local/include -I/usr/local/include/libpng15 -O2 -pipe -fno-strict-aliasing -DENABLE_IPV6 -DD_DNS_THREADED -D_REENTRANT -D_THREAD_SAFE -Wall -W -Wno-unused-parameter -Waggregate-return -MT dpiapi.o -MD -MP -MF .deps/dpiapi.Tpo -c -o dpiapi.o dpiapi.c
mv -f .deps/dpiapi.Tpo .deps/dpiapi.Po
c++ -DHAVE_CONFIG_H -I. -I..  -I.. -DDILLO_SYSCONF='"/usr/local/etc/dillo/"' -DDILLO_DOCDIR='"/usr/local/share/doc/dillo/"'  -I/usr/local/include -I/usr/local/include/libpng15 -I/usr/local/include -I/usr/local/include/freetype2 -O2 -pipe -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_THREAD_SAFE -D_REENTRANT -O2 -pipe -fno-strict-aliasing -Wall -W -Wno-unused-parameter -fno-rtti -fno-exceptions -MT findbar.o -MD -MP -MF .deps/findbar.Tpo -c -o findbar.o findbar.cc
mv -f .deps/findbar.Tpo .deps/findbar.Po
c++ -DHAVE_CONFIG_H -I. -I..  -I.. -DDILLO_SYSCONF='"/usr/local/etc/dillo/"' -DDILLO_DOCDIR='"/usr/local/share/doc/dillo/"'  -I/usr/local/include -I/usr/local/include/libpng15 -I/usr/local/include -I/usr/local/include/freetype2 -O2 -pipe -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_THREAD_SAFE -D_REENTRANT -O2 -pipe -fno-strict-aliasing -Wall -W -Wno-unused-parameter -fno-rtti -fno-exceptions -MT xembed.o -MD -MP -MF .deps/xembed.Tpo -c -o xembed.o xembed.cc
mv -f .deps/xembed.Tpo .deps/xembed.Po
mv -f .deps/menu.Tpo .deps/menu.Po
c++ -I/usr/local/include/libpng15 -I/usr/local/include -I/usr/local/include/freetype2 -O2 -pipe -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D
_LARGEFILE64_SOURCE -D_THREAD_SAFE -D_REENTRANT -O2 -pipe -fno-strict-aliasing -Wall -W -Wno-unused-parameter -fno-rtti -fno-exceptions  -Wl,-rpath,/usr/lib:/usr/local/lib -L/usr/local/lib -o dillo dillo.o paths.o tipwin.o ui.o uicmd.o bw.o cookies.o auth.o md5.o digest.o colors.o misc.o history.o prefs.o prefsparser.o keys.o url.o bitvec.o klist.o chain.o utf8.o timeout.o dialog.o web.o nav.o cache.o decode.o dicache.o capi.o domain.o css.o cssparser.o styleengine.o plain.o html.o form.o table.o bookmark.o dns.o gif.o jpeg.o png.o imgbuf.o image.o menu.o dpiapi.o findbar.o xembed.o ../dlib/libDlib.a ../dpip/libDpip.a IO/libDiof.a ../dw/libDw-widgets.a ../dw/libDw-fltk.a ../dw/libDw-core.a ../lout/liblout.a -ljpeg -L/usr/local/lib -lpng15 -L/usr/local/lib -lm -Wl,-rpath,/usr/local/lib -L/usr/ports/x11-toolkits/fltk/work/fltk-1.3.2/src -lfltk -lXext -lXft -lfontconfig -lXinerama -lpthread -lm -lX11 -lz -lX11 
decode.o: In function `a_Decode_charset_init':
decode.c:(.text+0x60c): undefined reference to `libiconv_open'
decode.o: In function `Decode_charset':
decode.c:(.text+0x71d): undefined reference to `libiconv'
decode.o: In function `Decode_charset_free':
decode.c:(.text+0x7ae): undefined reference to `libiconv_close'
form.o: In function `DilloHtmlForm::buildQueryData(DilloHtmlInput*)':
form.cc:(.text+0x2d54): undefined reference to `libiconv_open'
form.cc:(.text+0x2d90): undefined reference to `libiconv_open'
form.cc:(.text+0x3216): undefined reference to `libiconv_close'
form.o: In function `DilloHtmlForm::encodeText(void*, Dstr**)':
form.cc:(.text+0x35da): undefined reference to `libiconv'
c++: error: linker command failed with exit code 1 (use -v to see invocation)
gmake[5]: *** [dillo] Error 1
gmake[5]: Leaving directory `/usr/ports/www/dillo2/work/dillo-3.0.4/src'
gmake[4]: *** [all-recursive] Error 1
gmake[4]: Leaving directory `/usr/ports/www/dillo2/work/dillo-3.0.4/src'
gmake[3]: *** [all-recursive] Error 1
gmake[3]: Leaving directory `/usr/ports/www/dillo2/work/dillo-3.0.4'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory `/usr/ports/www/dillo2/work/dillo-3.0.4'
===> Compilation failed unexpectedly.
Try to set MAKE_JOBS_UNSAFE=yes and rebuild before reporting the failure to
the maintainer.
*** Error code 1

Stop.
make: stopped in /usr/ports/www/dillo2

===>>> make build failed for www/dillo2
===>>> Aborting update

===>>> Installation of x11-toolkits/fltk (fltk-1.3.2_1) complete


===>>> You can restart from the point of failure with this command line:
       portmaster <flags> www/dillo2