Consider supporting Brew

[KJ7LNW]

here is a start:

class Xnec2c < Formula
  desc "Multi-threaded EM tool based on NEC2 to model antenna radiation patterns"
  homepage "https://www.xnec2c.org/"
  url "https://www.xnec2c.org/releases/xnec2c-v4.4.12.tar.gz"
  sha256 "e98af1e8b9098df9cc03f90950358b846cc6a2965e79c0114ab711fbe51272c5"
  license "GPL-3.0-or-later"

  depends_on "atk"
  depends_on "cairo"
  depends_on "gdk-pixbuf"
  depends_on "glib"
  depends_on "gtk+3"
  depends_on "librsvg"
  depends_on "pango"
  depends_on "autoconf"
  depends_on "automake"

  def install
    system "./autogen.sh"
    system "./configure", *std_configure_args
    system "make"
    system "make install"
    system "make desktop-install"
  end

  test do
    system "#{bin}/xnec2c", "-h"
  end
end