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#
# Copyright (c) 2026, Apollo Telephone Laboratories.
# Provided under the BSD-3 clause.
#
CFILES = $(shell find core/ -name "*.c")
OFILES = $(CFILES:.c=.o)
DFILES = $(CFILES:.c=.d)
CC = gcc
LD = ld
CFLAGS = \
-Wall \
-MMD \
-fpic \
-ffreestanding \
-fno-stack-protector \
-fno-stack-check \
-fshort-wchar \
-mno-red-zone \
-maccumulate-outgoing-args \
-Ihead \
-Ignu-efi/inc
LDFLAGS = \
-shared \
-Bsymbolic \
-Lgnu-efi/x86_64/lib \
-Lgnu-efi/x86_64/gnuefi \
-Tgnu-efi/gnuefi/elf_x86_64_efi.lds \
gnu-efi/x86_64/gnuefi/crt0-efi-x86_64.o
OBJCOPY_FLAGS = \
-j .text \
-j .sdata \
-j .data \
-j .rodata \
-j .dynamic \
-j .dynsym \
-j .rel \
-j .rela \
-j .rel.* \
-j .rela.* \
-j .reloc \
--output-target efi-app-x86_64 \
--subsystem=10
.PHONY: all
all: prebuild gnu-efi $(OFILES)
ld $(LDFLAGS) $(OFILES) -lgnuefi -lefi -o main.so
objcopy $(OBJCOPY_FLAGS) main.so BOOTX64.EFI
rm -f *.so
.PHONY: prebuild
prebuild:
echo -e "/* Generated by build; DO NOT edit */\n" >head/sboot/config.h
cat config.def.h >>head/sboot/config.h
gnu-efi:
git clone https://github.com/ncroxon/gnu-efi.git
cd gnu-efi; make
-include $(DFILES)
%.o: %.c
$(CC) -c $(CFLAGS) $< -o $@
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