Makefile

# =====================================================
#      Makefile
#      ApexBIOS compile script
#
#      Based on GPL-3.0 open source agreement
#      Copyright © 2020 ViudiraTech, based on the GPLv3 agreement.
# =====================================================

ifeq ($(VERBOSE), 1)
  V=
  Q=
else
  V=@printf "\033[1;32m[Build]\033[0m $@ ...\n";
  Q=@
endif

ASM             = nasm
ASMFLAGS        = -fbin

CC              = gcc
CFLAGS          = -m32 -ffreestanding -fno-pic -w -Os -I ./src/include/ -fno-stack-protector

LD              = ld
LDFLAGS         = -nostdlib -static -T scripts/linker.ld

SRCDIR         := src
OBJDIR         := build

C_SOURCES      := $(shell find * -name "*.c")
S_SOURCES      := $(shell find * -name "*.s")
HEADERS        := $(shell find * -name "*.h")

rwildcard       = $(foreach d,$(wildcard $(1:=/*)),$(call rwildcard,$d,$2) $(filter $(subst *,%,$2),$d))
reverse         = $(if $(1),$(call reverse,$(wordlist 2,$(words $(1)),$(1)))) $(firstword $(1))
SRC             = $(call rwildcard,$(SRCDIR),*.c)
OBJS            = $(call reverse,$(patsubst $(SRCDIR)/%.c, $(OBJDIR)/%.o, $(SRC)))

OUTFILE         = bios.rom

$(OBJDIR)/%.o: $(SRCDIR)/%.c
	@mkdir -p $(@D)
	$(V)$(CC) $(CFLAGS) -c $^ -o $@

%.fmt: %
	$(Q)printf "\033[1;32m[Format]\033[0m $< ...\n"
	$(Q)clang-format -i $<

.PHONY: format build clean run

build: $(OBJS)
	@$(LD) $(LDFLAGS) $(OBJS) src/lib/logo.lib src/lib/EPA.lib -o build/c_entry.bin
	@printf "\n\033[1;32m[LINK]\033[0m Linking..."

	@stat -L -c "" build/c_entry.bin
	@$(ASM) $(ASMFLAGS) src/entry16.asm -o $(OUTFILE)
	@printf "\033[1;32m[Done]\033[0m Compilation complete.\n\n"

format: $(C_SOURCES:%=%.fmt) $(S_SOURCES:%=%.fmt) $(HEADERS:%=%.fmt)
	$(Q)printf "\033[1;32m[Done]\033[0m Code Format complete.\n\n"

clean:
	@rm -rf build bios.rom
	@printf "\033[1;32m[Done]\033[0m Clean done.\n\n"

run:
	qemu-system-x86_64 -bios $(OUTFILE) -serial stdio -vga none -device ramfb -m 256M