Merge branch 'master' into jgrpp

# Conflicts:
#	config.lib
#	projects/openttd_vs140.vcxproj
#	projects/openttd_vs140.vcxproj.filters
#	projects/openttd_vs141.vcxproj
#	projects/openttd_vs141.vcxproj.filters
#	projects/openttd_vs142.vcxproj
#	projects/openttd_vs142.vcxproj.filters
#	src/aircraft_cmd.cpp
#	src/base_station_base.h
#	src/core/pool_type.hpp
#	src/disaster_vehicle.cpp
#	src/economy.cpp
#	src/engine.cpp
#	src/group.h
#	src/group_cmd.cpp
#	src/group_gui.cpp
#	src/lang/english.txt
#	src/lang/german.txt
#	src/linkgraph/linkgraph_gui.cpp
#	src/network/network_command.cpp
#	src/network/network_server.cpp
#	src/openttd.cpp
#	src/order_cmd.cpp
#	src/road_cmd.cpp
#	src/saveload/afterload.cpp
#	src/saveload/cargopacket_sl.cpp
#	src/saveload/linkgraph_sl.cpp
#	src/saveload/order_sl.cpp
#	src/saveload/station_sl.cpp
#	src/saveload/town_sl.cpp
#	src/saveload/vehicle_sl.cpp
#	src/screenshot.cpp
#	src/screenshot.h
#	src/settings_gui.cpp
#	src/settings_type.h
#	src/smallmap_gui.cpp
#	src/station.cpp
#	src/station_cmd.cpp
#	src/table/settings.ini
#	src/toolbar_gui.cpp
#	src/town_cmd.cpp
#	src/train.h
#	src/train_cmd.cpp
#	src/train_gui.cpp
#	src/vehicle.cpp
#	src/vehicle_base.h
#	src/vehiclelist.cpp
#	src/window_type.h

config.lib

@@ -1609,12 +1609,20 @@ make_cflags_and_ldflags() {
 			# extensions in a way that breaks build with at least ICC.
 			# This requires -O1 or more, so debug level 3 (-O0) is excluded.
 			CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
+			if [ "$os" = "MINGW" ]; then
+				# Prevent undefined references when _FORTIFY_SOURCE > 0
+				LDFLAGS="$LDFLAGS -fstack-protector"
+			fi
 		fi
 
 		cc_build_is_gcc=`basename "$cc_build" | grep "gcc" 2>/dev/null`
 		if [ -n "$cc_build_is_gcc" ]; then
 			# Add -O1 and fortify source to the tools needed for building, on gcc
 			CFLAGS_BUILD="$CFLAGS_BUILD -D_FORTIFY_SOURCE=2 -O1"
+			if [ "$os" = "MINGW" ]; then
+				# Prevent undefined references when _FORTIFY_SOURCE > 0
+				LDFLAGS_BUILD="$LDFLAGS_BUILD -fstack-protector"
+			fi
 		elif [ -n "`basename "$cc_build" | grep "clang" 2>/dev/null`" ]; then
 			# Add -O1 to the tools needed for building, on clang
 			CFLAGS_BUILD="$CFLAGS_BUILD -O1"