tentative pioneers 15.1 homebrew formula, still having problems with icons

pioneers.rb

require 'formula'

class Pioneers < Formula
  url 'https://downloads.sourceforge.net/project/pio/Source/pioneers-15.1.tar.gz'
  homepage 'http://pio.sourceforge.net/'
  sha1 'cea94cd77edef31b3f9e601077dff9b199dfeaf4'

  fails_with :clang do
    build 318
    cause "'#line directive requires a positive integer' argument in generated file"
  end

  depends_on 'pkg-config' => :build
  depends_on 'intltool' => :build
  depends_on 'gettext'
  depends_on 'gtk+'
  depends_on 'gdk-pixbuf'
  depends_on 'librsvg' # svg images for gdk-pixbuf
  depends_on 'hicolor-icon-theme'

  def install
    # fix usage of echo options not supported by sh
    inreplace "Makefile.in", /\becho/, "/bin/echo"

    inreplace "configure", / -Wl,--as-needed/, ""
    inreplace "configure.ac", / -Wl,--as-needed/, ""
    inreplace "configure", / -Wl,-z,(relro|now)/, ""
    inreplace "configure.ac", / -Wl,-z,(relro|now)/, ""

    system "./configure", "--disable-debug", "--disable-dependency-tracking",
                          "--prefix=#{prefix}"
    system "make install"
  end
end