+CONVERT = convert
+WINDRES = windres
+
+CONVERT_ICON_ARGS = -transparent black -background transparent
+
+PROGBASE = rocksndiamonds
+PROGNAME = ../$(PROGBASE)
+
+EDITION ?= default
+
+
+# -----------------------------------------------------------------------------
+# configuring platform
+# -----------------------------------------------------------------------------
+
+ifeq ($(PLATFORM),unix) # compiling on Unix/Linux (generic)
+PROFILING_FLAGS = -pg
+endif
+
+ifeq ($(PLATFORM_BASE),cross-win) # cross-compiling to Windows
+PROGNAME = ../$(PROGBASE).exe
+EXTRA_LDFLAGS = -lshfolder -lwsock32
+endif
+
+ifeq ($(PLATFORM),emscripten) # compiling with Emscripten
+PROGNAME = ../$(PROGBASE).js
+CC = emcc
+AR = emar
+RANLIB = emranlib
+STRIP = true
+endif
+
+ifdef BUILD_DIST # distribution build
+ifeq ($(shell uname -s),Darwin) # compiling on Mac OS X
+MAC_TARGET_VERSION_MIN = 10.7
+EXTRA_FLAGS_MAC = -mmacosx-version-min=$(MAC_TARGET_VERSION_MIN)
+EXTRA_CFLAGS = $(EXTRA_FLAGS_MAC)
+EXTRA_LDFLAGS = $(EXTRA_FLAGS_MAC)
+MACOSX_DEPLOYMENT_TARGET = $MAC_TARGET_VERSION_MIN
+endif
+endif
+
+
+# -----------------------------------------------------------------------------
+# configuring target
+# -----------------------------------------------------------------------------
+
+ifndef TARGET # auto-detect compiling for SDL2
+ SDL_VERSION := $(shell sdl2-config --version 2> /dev/null)
+ ifdef SDL_VERSION
+ TARGET = sdl2
+ else
+ $(error SDL2 library not found)
+ endif
+endif
+
+# $(info Using SDL version $(SDL_VERSION) [TARGET == $(TARGET)])
+
+ifeq ($(TARGET),sdl2) # compiling for SDL2 target
+ifeq ($(PLATFORM),emscripten)
+SDL_LIBS = -s USE_SDL_IMAGE=2 -s USE_SDL_MIXER=2 -s USE_SDL_NET=2 -s USE_ZLIB=1
+SDL_FMTS = -s SDL2_IMAGE_FORMATS='["bmp","png","pcx","xpm"]'
+EXTRA_CFLAGS = $(SDL_LIBS)
+EXTRA_LDFLAGS = $(SDL_FMTS) -s INITIAL_MEMORY=65536000 -s ALLOW_MEMORY_GROWTH=1 --preload-file ../graphics/ --preload-file ../sounds/ --preload-file ../levels/ --preload-file ../music/ -s NO_EXIT_RUNTIME=0 -s ASYNCIFY -O2
+else
+SDL_LIBS = -lSDL2_image -lSDL2_mixer -lSDL2_net
+endif
+
+SYS_CFLAGS := -DTARGET_SDL2 $(shell sdl2-config --cflags)
+SYS_LDFLAGS := $(SDL_LIBS) $(shell sdl2-config --libs) -lm -lz
+endif
+
+
+# -----------------------------------------------------------------------------
+# configuring compile-time definitions
+# -----------------------------------------------------------------------------
+
+ifdef RO_GAME_DIR # path to read-only game data specified
+CONFIG_RO_GAME_DIR = -DRO_GAME_DIR="\"$(RO_GAME_DIR)\""
+endif
+
+ifdef RW_GAME_DIR # path to writable game data specified
+CONFIG_RW_GAME_DIR = -DRW_GAME_DIR="\"$(RW_GAME_DIR)\""
+endif
+
+CONFIG = $(CONFIG_RO_GAME_DIR) $(CONFIG_RW_GAME_DIR) $(JOYSTICK)
+
+DEBUG = -DDEBUG -g
+
+# PROFILING = $(PROFILING_FLAGS)
+
+# OPTIONS = $(DEBUG) -Wall # only for debugging purposes
+# OPTIONS = $(DEBUG) -O2 -Wall # only for debugging purposes
+# OPTIONS = $(DEBUG) -Wall # only for debugging purposes
+OPTIONS = $(DEBUG) -Wall -Wstrict-prototypes -Wmissing-prototypes
+# OPTIONS = $(DEBUG) -Wall -ansi -pedantic # only for debugging purposes
+# OPTIONS = -O2 -Wall -ansi -pedantic
+# OPTIONS = -O2 -Wall
+# OPTIONS = -O2
+
+ifdef BUILD_DIST # distribution build
+SYS_LDFLAGS := $(shell echo $(SYS_LDFLAGS) | \
+ sed -e "s%-rpath,[^ ]*%-rpath,'\$$ORIGIN/lib'%")
+OPTIONS = -O2 -Wall
+endif
+
+CFLAGS = $(OPTIONS) $(SYS_CFLAGS) $(EXTRA_CFLAGS) $(CONFIG)
+LDFLAGS = $(SYS_LDFLAGS) $(EXTRA_LDFLAGS)
+
+
+SRCS = main.c \
+ conf_gfx.c \
+ conf_snd.c \
+ conf_mus.c \
+ conf_hlp.c \
+ init.c \
+ config.c \
+ events.c \
+ tools.c \
+ screens.c \
+ game.c \
+ editor.c \
+ files.c \
+ tape.c \
+ anim.c \
+ network.c \
+ netserv.c
+
+OBJS = main.o \
+ conf_gfx.o \
+ conf_snd.o \
+ conf_mus.o \
+ conf_hlp.o \
+ init.o \
+ config.o \
+ events.o \
+ tools.o \
+ screens.o \
+ game.o \
+ editor.o \
+ files.o \
+ tape.o \
+ anim.o \
+ network.o \
+ netserv.o
+
+CNFS = conf_gfx.h \
+ conf_snd.h \
+ conf_mus.h \
+ conf_chr.c \
+ conf_chr.h \
+ conf_cus.c \
+ conf_cus.h \
+ conf_grp.c \
+ conf_grp.h \
+ conf_e2g.c \
+ conf_esg.c \
+ conf_e2s.c \
+ conf_fnt.c \
+ conf_g2s.c \
+ conf_g2m.c \
+ conf_var.c \
+ conf_act.c
+
+CNFS_CMD = ../build-scripts/create_element_defs.pl
+
+TIMESTAMP_FILE = conftime.h
+TIMESTAMP_FORMAT = %Y-%m-%d %H:%M
+
+# use SOURCE_DATE_EPOCH, or else last Git commit date, or else current date
+SOURCE_DATE_EPOCH ?= $(shell test -d ../.git && test `git ls-files -m | wc -l` -eq 0 && git show -s --format=%ct || date +%s)
+
+# get source date string from either GNU / Linux or BSD / Mac OS X style "date"
+SOURCE_DATE_STRING := $(shell date -u -d "@$(SOURCE_DATE_EPOCH)" "+$(TIMESTAMP_FORMAT)" 2>/dev/null || date -u -r "$(SOURCE_DATE_EPOCH)" "+$(TIMESTAMP_FORMAT)" 2>/dev/null || date -u "+$(TIMESTAMP_FORMAT)")
+
+COMMIT_HASH_FILE = confhash.h
+COMMIT_HASH_NONE = "[changed files]"
+
+# get last Git commit hash, if no files were changed
+SOURCE_HASH_STRING ?= $(shell test -d ../.git && test `git ls-files -m | wc -l` -eq 0 && git show -s --format=%h || echo "$(COMMIT_HASH_NONE)")
+
+LIBGAME_DIR = libgame
+LIBGAME = $(LIBGAME_DIR)/libgame.a