Add this

Makefile (copy 1)

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+CONFIG ?= config.default
+-include $(CONFIG)
+
+
+BINARY    ?= Chocolate-Wolfenstein-3D
+PREFIX    ?= /usr/local
+MANPREFIX ?= $(PREFIX)
+UNAME := $(shell uname -s)
+
+INSTALL         ?= install
+INSTALL_PROGRAM ?= $(INSTALL) -m 555 -s
+INSTALL_MAN     ?= $(INSTALL) -m 444
+INSTALL_DATA    ?= $(INSTALL) -m 444
+
+#CFLAGS += -Wall
+#CFLAGS += -W
+CFLAGS += -Wpointer-arith
+CFLAGS += -Wreturn-type
+CFLAGS += -Wwrite-strings
+CFLAGS += -Wcast-align
+
+CCFLAGS += $(CFLAGS)
+CCFLAGS += -Werror-implicit-function-declaration
+CCFLAGS += -Wimplicit-int
+CCFLAGS += -Wsequence-point -Iinclude -ISDL_mixer -ISDL1.3/include
+
+CXXFLAGS += $(CFLAGS)
+
+LDFLAGS += $(LDFLAGS_SDL) -lm
+
+SRCS :=
+SRCS += fmopl.cpp
+SRCS += id_ca.cpp
+SRCS += id_in.cpp
+SRCS += id_pm.cpp
+SRCS += id_sd.cpp
+SRCS += id_us_1.cpp
+SRCS += id_vh.cpp
+SRCS += id_vl.cpp
+SRCS += signon.cpp
+SRCS += wl_act1.cpp
+SRCS += wl_act2.cpp
+SRCS += wl_agent.cpp
+SRCS += wl_debug.cpp
+SRCS += wl_draw.cpp
+SRCS += wl_game.cpp
+SRCS += wl_inter.cpp
+SRCS += wl_main.cpp
+SRCS += wl_menu.cpp
+SRCS += wl_play.cpp
+SRCS += wl_state.cpp
+SRCS += wl_text.cpp
+SRCS += surface.cpp
+
+SRCS += SDL1.3/src/SDL.cpp
+SRCS += SDL1.3/src/SDL_assert.cpp
+SRCS += SDL1.3/src/SDL_error.cpp
+SRCS += SDL1.3/src/SDL_log.cpp
+
+SRCS += SDL1.3/src/stdlib/SDL_malloc.cpp
+SRCS += SDL1.3/src/stdlib/SDL_getenv.cpp
+SRCS += SDL1.3/src/stdlib/SDL_stdlib.cpp
+SRCS += SDL1.3/src/stdlib/SDL_string.cpp
+
+SRCS += SDL1.3/src/events/SDL_events.cpp
+
+SRCS += SDL1.3/src/joystick/SDL_joystick.cpp
+
+SRCS += SDL1.3/src/atomic/SDL_atomic.cpp
+SRCS += SDL1.3/src/atomic/SDL_spinlock.cpp
+
+SRCS += SDL1.3/src/video/SDL_blit.cpp
+SRCS += SDL1.3/src/video/SDL_blit_0.cpp
+SRCS += SDL1.3/src/video/SDL_blit_1.cpp
+SRCS += SDL1.3/src/video/SDL_blit_A.cpp
+SRCS += SDL1.3/src/video/SDL_blit_N.cpp
+SRCS += SDL1.3/src/video/SDL_surface.cpp
+SRCS += SDL1.3/src/video/SDL_fillrect.cpp
+SRCS += SDL1.3/src/video/SDL_rect.cpp
+SRCS += SDL1.3/src/video/SDL_RLEaccel.cpp
+SRCS += SDL1.3/src/video/SDL_pixels.cpp
+SRCS += SDL1.3/src/video/SDL_stretch.cpp
+SRCS += SDL1.3/src/video/SDL_blit_auto.cpp
+SRCS += SDL1.3/src/video/SDL_blit_copy.cpp
+SRCS += SDL1.3/src/video/SDL_blit_slow.cpp
+
+SRCS += SDL1.3/src/audio/SDL_audio.cpp
+SRCS += SDL1.3/src/audio/SDL_audiocvt.cpp
+SRCS += SDL1.3/src/audio/SDL_mixer.cpp
+SRCS += SDL1.3/src/audio/SDL_wave.cpp
+
+SRCS += SDL_mixer/mixer.cpp
+SRCS += SDL_mixer/music.cpp
+
+OBJS = $(filter %.o, $(SRCS:.c=.o) $(SRCS:.cpp=.o))
+
+.SUFFIXES:
+.SUFFIXES: .c .cpp .o
+
+Q ?= @
+
+all: $(BINARY)
+
+$(BINARY): $(OBJS)
+	@echo '===> LD $@'
+	$(Q)$(CC) $(CFLAGS) $(OBJS) $(LDFLAGS) -o $@
+
+.c.o:
+	@echo '===> CC $<'
+	$(Q)$(CC) $(CCFLAGS) -c $< -o $@
+
+.cpp.o:
+	@echo '===> CXX $<'
+	$(Q)$(CXX) $(CXXFLAGS) -c $< -o $@
+
+clean distclean:
+	@echo '===> CLEAN'
+	$(Q)rm -fr $(OBJS) $(BINARY)
+
+install: $(BINARY)
+	@echo '===> INSTALL'
+	$(Q)$(INSTALL) -d $(PREFIX)/bin
+	$(Q)$(INSTALL_PROGRAM) $(BINARY) $(PREFIX)/bin