pkg/54137: www/netsurf fails to build on Darwin

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>Number:         54137
>Category:       pkg
>Synopsis:       www/netsurf fails to build on Darwin
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Apr 23 21:45:00 +0000 2019
>Originator:     Jonathan Schleifer
>Release:        HEAD
>Organization:
>Environment:
>Description:
When trying to build www/netsurf, all files get compiled successfully, but linking fails with:

Undefined symbols for architecture x86_64:
  "_iconv", referenced from:
      _utf8_convert in utils_utf8.o
      _utf8_convert_html_chunk in utils_utf8.o
      _parserutils__filter_process_chunk in libparserutils.a(src_input_filter.o)
      _parserutils__filter_reset in libparserutils.a(src_input_filter.o)
  "_iconv_close", referenced from:
      _utf8_finalise in utils_utf8.o
      _utf8_convert in utils_utf8.o
      _utf8_to_html in utils_utf8.o
      _parserutils__filter_destroy in libparserutils.a(src_input_filter.o)
      _filter_set_encoding in libparserutils.a(src_input_filter.o)
  "_iconv_open", referenced from:
      _utf8_convert in utils_utf8.o
      _utf8_to_html in utils_utf8.o
      _filter_set_encoding in libparserutils.a(src_input_filter.o)
  "_timerisset", referenced from:
      _netsurf_render_log in utils_log.o
ld: symbol(s) not found for architecture x86_64
>How-To-Repeat:
cd www/netsurf && bmake
>Fix: