# ============================================================================
# Makefile for windrv demo - Windows 3.x display driver loader for DJGPP/DOS
#
# Targets:
#   all    - Build libwindrv.a and demo.exe (default)
#   lib    - Build only libwindrv.a
#   demo   - Build only demo.exe
#   clean  - Remove all build artifacts
#
# Output:
#   bin/demo.exe      - Demo program
#   bin/CWSDPMI.EXE   - DPMI host (extracted from tools/cwsdpmi.zip)
#   bin/*.DRV          - Driver files (copied from drivers/)
#   win31drv/libwindrv.a - Static library
# ============================================================================

DJGPP_PREFIX ?= $(HOME)/djgpp/djgpp

CC      = $(DJGPP_PREFIX)/bin/i586-pc-msdosdjgpp-gcc
CFLAGS  = -Wall -Wextra -O2 -std=gnu99 -Iwin31drv
LDFLAGS = -lm

# DJGPP binutils need libfl.so.2 which may not be installed system-wide
export LD_LIBRARY_PATH := $(realpath tools/lib):$(LD_LIBRARY_PATH)

OBJDIR  = obj
BINDIR  = bin

LIBDIR  = win31drv
LIB     = $(LIBDIR)/libwindrv.a

DEMO_SRC = demo.c
DEMO_OBJ = $(OBJDIR)/demo.o
DEMO_EXE = $(BINDIR)/demo.exe

.PHONY: all clean lib demo

all: lib demo

lib:
	$(MAKE) -C $(LIBDIR)

demo: $(DEMO_EXE)

$(DEMO_EXE): $(DEMO_OBJ) lib | $(BINDIR)
	$(CC) $(CFLAGS) -o $@ $(DEMO_OBJ) -L$(LIBDIR) -lwindrv $(LDFLAGS)
	unzip -oj tools/cwsdpmi.zip bin/CWSDPMI.EXE -d $(BINDIR) 2>/dev/null; true
	cp tools/TEST.BAT $(BINDIR)/
	-cp -n drivers/*.DRV $(BINDIR)/ 2>/dev/null; true
	-cp -n fon/*.FON $(BINDIR)/ 2>/dev/null; true
	-cp -n ttf/*.TTF $(BINDIR)/ 2>/dev/null; true

$(OBJDIR)/%.o: %.c | $(OBJDIR)
	$(CC) $(CFLAGS) -c -o $@ $<

$(OBJDIR):
	mkdir -p $(OBJDIR)

$(BINDIR):
	mkdir -p $(BINDIR)

# Dependencies
$(OBJDIR)/demo.o: demo.c win31drv/windrv.h win31drv/wintypes.h

clean:
	$(MAKE) -C $(LIBDIR) clean
	-rm -rf $(OBJDIR) $(BINDIR)