@@ -, +, @@ 
 #include <boost/gil/extension/io/io_error.hpp>
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                    ^
 #include <boost/gil/extension/io/dynamic_io.hpp>
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                       ^
 #define GIL_DEFINE_BASE_TYPEDEFS(B, CM, CS)                                                  \
         ^
                          ^
---
 games/freeorion/Makefile             |   1 +
 games/freeorion/files/patch-boost168 | 168 +++++++++++++++++++++++++++
 2 files changed, 169 insertions(+)
 create mode 100644 games/freeorion/files/patch-boost168
--- b/games/freeorion/Makefile	
+++ b/games/freeorion/Makefile	
@@ -4,6 +4,7 @@ 
 PORTNAME=	freeorion
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.4.8-rc1
+PORTREVISION=	1
 CATEGORIES=	games
 
 MAINTAINER=	amdmi3@FreeBSD.org
--- /dev/null	
+++ b/games/freeorion/files/patch-boost168	
@@ -0,0 +1,168 @@ 
+https://github.com/freeorion/freeorion/pull/2221
+
+--- GG/CMakeLists.txt.orig	2018-06-14 14:12:09 UTC
++++ GG/CMakeLists.txt
+@@ -144,6 +144,16 @@ if(USE_STATIC_LIBS)
+     )
+ endif()
+ 
++target_compile_definitions(GiGi
++    PRIVATE
++
++        # Starting with boost 1.68 boost::gil integrates support for
++        # grayscale-alpha png images, so prefer their implementation
++        # instead of our hacky gilext code.
++        $<$<VERSION_LESS:${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION},1.68>:GIGI_CONFIG_USE_OLD_IMPLEMENTATION_OF_GIL_PNG_IO>
++        $<$<VERSION_GREATER:${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION},1.67>:BOOST_GIL_IO_ENABLE_GRAY_ALPHA>
++)
++
+ target_include_directories(GiGi SYSTEM
+     PRIVATE
+         ${Boost_INCLUDE_DIRS}
+--- GG/src/GUI.cpp.orig	2018-06-14 14:12:09 UTC
++++ GG/src/GUI.cpp
+@@ -37,14 +37,19 @@
+ #include <GG/ZList.h>
+ 
+ #if GG_HAVE_LIBPNG
+-# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 7)
+-#  pragma GCC diagnostic push
+-#  pragma GCC diagnostic ignored "-Wunused-local-typedefs"
++# if GIGI_CONFIG_USE_OLD_IMPLEMENTATION_OF_GIL_PNG_IO
++#  if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 7)
++#   pragma GCC diagnostic push
++#   pragma GCC diagnostic ignored "-Wunused-local-typedefs"
++#  endif
++#  include "gilext/io/png_io.hpp"
++#  include "gilext/io/png_io_v2_compat.hpp"
++#  if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 7)
++#   pragma GCC diagnostic pop
++#  endif
++# else
++#  include <boost/gil/extension/io/png.hpp>
+ # endif
+-# include "gilext/io/png_io.hpp"
+-# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 7)
+-#  pragma GCC diagnostic pop
+-# endif
+ #endif
+ 
+ #include <boost/algorithm/string/predicate.hpp>
+@@ -132,12 +137,15 @@ namespace {
+         glPopClientAttrib();
+ 
+         using namespace boost::gil;
+-        png_write_view(filename,
+-                       flipped_up_down_view(
+-                           interleaved_view(Value(size.x),
+-                                            Value(size.y),
+-                                            static_cast<rgba8_pixel_t*>(static_cast<void*>(&bytes[0])),
+-                                            Value(size.x) * sizeof(rgba8_pixel_t))));
++        write_view(
++            filename,
++            flipped_up_down_view(
++                interleaved_view(
++                    Value(size.x),
++                    Value(size.y),
++                    static_cast<rgba8_pixel_t*>(static_cast<void*>(&bytes[0])),
++                    Value(size.x) * sizeof(rgba8_pixel_t))),
++            png_tag());
+ #endif
+     }
+ }
+--- GG/src/Texture.cpp.orig	2018-06-14 14:12:09 UTC
++++ GG/src/Texture.cpp
+@@ -36,7 +36,12 @@
+ #include <boost/algorithm/string/case_conv.hpp>
+ 
+ #if GG_HAVE_LIBPNG
+-# include "gilext/io/png_dynamic_io.hpp"
++# if GIGI_CONFIG_USE_OLD_IMPLEMENTATION_OF_GIL_PNG_IO
++#  include "gilext/io/png_dynamic_io.hpp"
++#  include "gilext/io/png_io_v2_compat.hpp"
++# else
++#  include <boost/gil/extension/io/png.hpp>
++# endif
+ #endif
+ 
+ #include <iostream>
+@@ -241,12 +246,12 @@ void Texture::Load(const boost::filesystem::path& path
+         // formats above.
+ #if GG_HAVE_LIBPNG
+         if (extension == ".png")
+-            gil::png_read_image(path, image);
++            gil::read_image(filename, image, gil::image_read_settings<gil::png_tag>());
+         else
+ #endif
+ #if GG_HAVE_LIBTIFF
+         if (extension == ".tif" || extension == ".tiff")
+-            gil::tiff_read_image(filename, image);
++            gil::read_image(filename, image, gil::image_read_settings<gil::tiff_tag>());
+         else
+ #endif
+             throw BadFile("Texture file \"" + filename + "\" does not have a supported file extension");
+@@ -256,14 +261,14 @@ void Texture::Load(const boost::filesystem::path& path
+ #if GG_HAVE_LIBPNG
+         if (extension == ".png") {
+             gil::rgba8_image_t rgba_image;
+-            gil::png_read_and_convert_image(path, rgba_image);
++            gil::read_and_convert_image(filename, rgba_image, gil::image_read_settings<gil::png_tag>());
+             image.move_in(rgba_image);
+         }
+ #endif
+ #if GG_HAVE_LIBTIFF
+         if (extension == ".tif" || extension == ".tiff") {
+             gil::rgba8_image_t rgba_image;
+-            gil::tiff_read_and_convert_image(filename, rgba_image);
++            gil::read_and_convert_image(filename, rgba_image, gil::image_read_settings<gil::tiff_tag>());
+             image.move_in(rgba_image);
+         }
+ #endif
+--- GG/src/gilext/io/png_io_v2_compat.hpp.orig	2018-07-20 13:44:48 UTC
++++ GG/src/gilext/io/png_io_v2_compat.hpp
+@@ -0,0 +1,45 @@
++#ifndef GILEXT_PNG_IO_V2_COMPAT_H
++#define GILEXT_PNG_IO_V2_COMPAT_H
++
++namespace boost { namespace gil {
++
++struct png_tag {};
++
++template< typename Tag>
++struct image_read_settings {};
++
++template< typename String
++        , typename Image
++        , typename FormatTag
++        >
++inline
++void read_image( const String&    file_name
++               , Image&           image
++               , const FormatTag& tag
++               )
++{ boost::gil::png_read_image(file_name, image); }
++
++template< typename String
++        , typename Image
++        , typename FormatTag
++        >
++inline
++void read_and_convert_image( const String&    file_name
++                           , Image&           image
++                           , const FormatTag& tag
++                           )
++{ boost::gil::png_read_and_convert_image(file_name, image); }
++} }
++
++template< typename String
++        , typename View
++        , typename FormatTag
++        >
++inline
++void write_view( const String&    file_name
++               , const View&      view
++               , const FormatTag& tag
++               )
++{ boost::gil::png_write_view( file_name, view); }
++
++#endif