diff -ruN frogatto.orig/Makefile frogatto/Makefile
--- frogatto.orig/Makefile	2018-06-16 11:04:06.590814000 +0300
+++ frogatto/Makefile	2018-06-16 14:07:26.780044000 +0300
@@ -3,7 +3,7 @@
 
 PORTNAME=	frogatto
 PORTVERSION=	1.3.1
-PORTREVISION=	14
+PORTREVISION=	15
 CATEGORIES=	games
 
 MAINTAINER=	fiziologus@gmail.com
@@ -26,6 +26,7 @@
 ALL_TARGET=	game server
 USE_GL=		glew glu
 USE_SDL=	sdl image mixer ttf
+USE_CXXSTD=	c++11
 
 PLIST_FILES=	bin/${PORTNAME} bin/${PORTNAME}-server
 
diff -ruN frogatto.orig/files/patch-Makefile frogatto/files/patch-Makefile
--- frogatto.orig/files/patch-Makefile	2018-06-16 11:03:41.104439000 +0300
+++ frogatto/files/patch-Makefile	2018-06-16 13:58:33.950319000 +0300
@@ -14,7 +14,7 @@
  
  # Initial compiler options, used before CXXFLAGS and CPPFLAGS.
 -BASE_CXXFLAGS += -g -fno-inline-functions -fthreadsafe-statics -Wnon-virtual-dtor -Werror -Wignored-qualifiers -Wformat -Wswitch
-+BASE_CXXFLAGS += -fno-inline-functions -fthreadsafe-statics -Wnon-virtual-dtor -Werror -Wformat -Wswitch
++BASE_CXXFLAGS += -fno-inline-functions -fthreadsafe-statics -Wnon-virtual-dtor -Werror -Wformat -Wswitch -Wno-narrowing
  
  # Compiler include options, used after CXXFLAGS and CPPFLAGS.
  INC := $(shell pkg-config --cflags x11 sdl glu glew SDL_image libpng zlib)
diff -ruN frogatto.orig/files/patch-src-code_editor_dialog.cpp frogatto/files/patch-src-code_editor_dialog.cpp
--- frogatto.orig/files/patch-src-code_editor_dialog.cpp	1970-01-01 03:00:00.000000000 +0300
+++ frogatto/files/patch-src-code_editor_dialog.cpp	2018-06-16 13:02:03.890768000 +0300
@@ -0,0 +1,11 @@
+--- src/code_editor_dialog.cpp.orig	2018-06-16 12:59:49.843741000 +0300
++++ src/code_editor_dialog.cpp	2018-06-16 13:01:13.695918000 +0300
+@@ -55,7 +55,7 @@
+ 
+ 	//std::cerr << "CED: " << x() << "," << y() << "; " << width() << "," << height() << std::endl;
+ 	drag_widget* dragger = new drag_widget(x(), y(), width(), height(),
+-		drag_widget::DRAG_HORIZONTAL, NULL, 
++		drag_widget::DRAG_HORIZONTAL, [](int, int){}, 
+ 		boost::bind(&code_editor_dialog::on_drag_end, this, _1, _2), 
+ 		boost::bind(&code_editor_dialog::on_drag, this, _1, _2));
+ 
diff -ruN frogatto.orig/files/patch-src-surface_cache.cpp frogatto/files/patch-src-surface_cache.cpp
--- frogatto.orig/files/patch-src-surface_cache.cpp	1970-01-01 03:00:00.000000000 +0300
+++ frogatto/files/patch-src-surface_cache.cpp	2018-06-16 14:01:18.086215000 +0300
@@ -0,0 +1,11 @@
+--- src/surface_cache.cpp.orig	2018-06-16 13:59:29.319430000 +0300
++++ src/surface_cache.cpp	2018-06-16 14:00:09.140102000 +0300
+@@ -116,7 +116,7 @@
+ 	}
+ #endif // ANDROID
+ 	//std::cerr << "loading image '" << fname << "'\n";
+-	if(surf.get() == false || surf->w == 0) {
++	if(surf.get() == nullptr || surf->w == 0) {
+ 		if(key != "") {
+ 			std::cerr << "failed to load image '" << key << "'\n";
+ 		}
diff -ruN frogatto.orig/files/patch-src-texture.hpp frogatto/files/patch-src-texture.hpp
--- frogatto.orig/files/patch-src-texture.hpp	1970-01-01 03:00:00.000000000 +0300
+++ frogatto/files/patch-src-texture.hpp	2018-06-16 11:12:47.488775000 +0300
@@ -0,0 +1,11 @@
+--- src/texture.hpp.orig	2018-06-16 11:06:31.462187000 +0300
++++ src/texture.hpp	2018-06-16 11:11:11.775394000 +0300
+@@ -58,7 +58,7 @@
+ 	unsigned int get_id() const;
+ 	static void set_current_texture(unsigned int id);
+ 	void set_as_current_texture() const;
+-	bool valid() const { return id_; }
++	bool valid() const { return static_cast<bool>(id_); }
+ 
+ 	static texture get(const std::string& str, int options=0);
+ 	static texture get(const std::string& str, const std::string& algorithm);