# Part of KPCOMM, Copyright (c) 2026 Scott Duensing, under the MIT License.
# See LICENSE.md for license information.
# SPDX-License-Identifier: MIT
#
# watcom.mk -- KPCOMM.DRV built on Linux with Open Watcom v2's 16-bit
# Windows target, for hosts without MSVC 1.52 (the makefile, for NMAKE, is
# the MSVC build). Uses the Open Watcom JoeyLib's installer sets up, unless
# WATCOM names another.
#
#   make -f watcom.mk                bin/kpcomm.drv
#   make -f watcom.mk clean          remove obj/ and bin/
#   make -f watcom.mk OBJ=DIR BIN=DIR   build somewhere else
#
# Compiler flags, as the MSVC build's: Windows target (-bt=windows) DLL
# (-bd), small model with SS != DS (-ms -zu), Windows prolog for exported
# functions (-zw), no stack probes (-s), 286 code (-2), structures packed
# on 2 bytes (-zp2), all warnings (-w4). The _asm blocks set variables
# Watcom cannot see set (W200), so those warnings are off (-wcd=200);
# kpcomm.lnk is commdrv.def for wlink.

WATCOM ?= $(abspath $(CURDIR)/../../joeylib/toolchains/opt/openWatcom)
export WATCOM
export PATH := $(WATCOM)/binl64:$(PATH)

CC      := wcc
LINK    := wlink
CFLAGS  := -q -bt=windows -bd -ms -zu -zw -s -2 -zp2 -os -w4 -wcd=200 -we -i=$(WATCOM)/h -i=$(WATCOM)/h/win

OBJ     ?= obj
BIN     ?= bin
TARGET  := $(BIN)/kpcomm.drv
OBJS    := $(OBJ)/commdrv.obj $(OBJ)/isr.obj $(OBJ)/lpt.obj

all: $(TARGET)

$(OBJ)/%.obj: %.c commdrv.h watcom.mk | $(OBJ)
	$(CC) $(CFLAGS) -fo=$@ $<

$(TARGET): $(OBJS) kpcomm.lnk | $(BIN)
	$(LINK) option quiet @kpcomm.lnk name $@ $(foreach o,$(OBJS),file $(o)) option map=$(OBJ)/kpcomm.map

$(OBJ) $(BIN):
	mkdir -p $@

clean:
	rm -rf $(OBJ) $(BIN)

.PHONY: all clean