# Makefile for desktop (GUI desktop environment) on MontaukOS
# Copyright (c) 2025 Daniel Hammer

MAKEFLAGS += -rR
.SUFFIXES:

# ---- Toolchain ----

TOOLCHAIN_PREFIX := $(shell cd ../../.. && pwd)/toolchain/local/bin/x86_64-montauk-
ifeq ($(wildcard $(TOOLCHAIN_PREFIX)gcc),)
    CXX = $(error x86_64-montauk toolchain not found. Run ./toolchain/build-montauk-toolchain.sh first)
else
    CXX := $(TOOLCHAIN_PREFIX)g++
endif

# ---- Paths ----

PROG_INC := ../../include
JPEG_LIB := ../../lib/libjpeg
LIBC_LIB := ../../lib/libc
BEARSSL  := ../../lib/bearssl
LOADER_LIB := ../../lib/libloader/liblibloader.a
LINK_LD  := ../../link.ld
BINDIR   := ../../bin
OBJDIR   := obj

# ---- C++ compiler flags ----

CXXFLAGS := \
    -std=gnu++20 \
    -g -O2 -pipe \
    -Wall \
    -Wextra \
    -Wno-unused-parameter \
    -Wno-unused-function \
    -ffreestanding \
    -fno-stack-protector \
    -fno-stack-check \
    -fno-rtti \
    -fno-exceptions \
    -ffunction-sections \
    -fdata-sections \
    -msse \
    -msse2 \
    -MMD -MP \
    -I $(PROG_INC) \
    -isystem $(PROG_INC)/libc \
    -I $(BEARSSL)/inc

# ---- Linker flags ----

LDFLAGS := \
    -nostdlib \
    -Wl,--gc-sections \
    -T $(LINK_LD)

# ---- C++ source files ----

CORE_SRCS := main.cpp window.cpp panel.cpp messaging.cpp desktop_icons.cpp wifi.cpp battery.cpp brightness.cpp compose.cpp input.cpp dialogs.cpp launcher.cpp desktop_builtin.cpp desktop_catalog.cpp consent.cpp font_data.cpp stb_truetype_impl.cpp
APP_SRCS  := $(sort $(shell find apps -name '*.cpp' -print))
SRCS      := $(CORE_SRCS) $(APP_SRCS)
OBJS      := $(addprefix $(OBJDIR)/,$(SRCS:.cpp=.o))

# ---- Target ----

TARGET := $(BINDIR)/os/desktop.elf

.PHONY: all clean

all: $(TARGET)

# ---- Libraries ----

LIBS := $(LOADER_LIB) $(JPEG_LIB)/libjpeg.a $(BEARSSL)/libbearssl.a $(LIBC_LIB)/liblibc.a

$(TARGET): $(OBJS) $(LIBS) $(LINK_LD) Makefile
	mkdir -p $(BINDIR)/os
	$(CXX) $(CXXFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@

# Sources
$(OBJDIR)/%.o: %.cpp Makefile
	mkdir -p $(dir $@)
	$(CXX) $(CXXFLAGS) -c $< -o $@

-include $(OBJS:.o=.d)

clean:
	rm -rf $(OBJDIR) $(TARGET)