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Make.common
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ARCH = x64
# You can alter the subsystem according to your EFI binary target:
# 10 = EFI application
# 11 = EFI boot service driver
# 12 = EFI runtime driver
SUBSYSTEM = 11
# Try to auto-detect the target ARCH
ifeq ($(shell uname -o),Msys)
IS_MINGW32 = $(findstring MINGW32,$(shell uname -s))
IS_MINGW64 = $(findstring MINGW64,$(shell uname -s))
ifeq ($(IS_MINGW32),MINGW32)
ARCH = ia32
endif
ifeq ($(IS_MINGW64),MINGW64)
ARCH = x64
endif
else
ifeq ($(shell uname -m),x86_64)
ARCH = x64
else ifeq ($(shell uname -m),arm)
ARCH = arm
CROSS_COMPILE =
else ifeq ($(shell uname -m),aa64)
ARCH = aarch64
CROSS_COMPILE =
else ifeq ($(shell uname -m),riscv64)
ARCH = riscv64
CROSS_COMPILE =
else
ARCH = ia32
endif
endif
# Auto-detect the host arch for MinGW
ifeq ($(shell uname -m),x86_64)
MINGW_HOST = w64
else
MINGW_HOST = w32
endif
CRT0_ARCH = $(ARCH)
ifeq ($(ARCH),x64)
GNUEFI_ARCH = x86_64
GCC_ARCH = x86_64
CPU_ARCH = x86_64
CROSS_COMPILE = $(GCC_ARCH)-$(MINGW_HOST)-mingw32-
EP_PREFIX =
CFLAGS = -m64 -mno-red-zone
LDFLAGS = -Wl,-dll -Wl,--subsystem,$(SUBSYSTEM)
else ifeq ($(ARCH),ia32)
GNUEFI_ARCH = ia32
GCC_ARCH = i686
CPU_ARCH = i386
CROSS_COMPILE = $(GCC_ARCH)-$(MINGW_HOST)-mingw32-
EP_PREFIX = _
CFLAGS = -m32 -mno-red-zone -Wno-pointer-to-int-cast
LDFLAGS = -Wl,-dll -Wl,--subsystem,$(SUBSYSTEM)
else ifeq ($(ARCH),arm)
GNUEFI_ARCH = arm
GCC_ARCH = arm
CPU_ARCH = arm
CROSS_COMPILE = $(GCC_ARCH)-linux-gnueabihf-
EP_PREFIX =
CFLAGS = -marm -fpic -fshort-wchar -Wno-pointer-to-int-cast
LDFLAGS = -Wl,--no-wchar-size-warning -Wl,--defsym=EFI_SUBSYSTEM=$(SUBSYSTEM)
CRT0_LIBS = -lgnuefi
else ifeq ($(ARCH),aa64)
GNUEFI_ARCH = aarch64
GCC_ARCH = aarch64
CPU_ARCH = arm64
CRT0_ARCH = aarch64
CROSS_COMPILE = $(GCC_ARCH)-linux-gnu-
EP_PREFIX =
CFLAGS = -fpic -fshort-wchar -Wno-pointer-to-int-cast
LDFLAGS = -Wl,--no-wchar-size-warning -Wl,--defsym=EFI_SUBSYSTEM=$(SUBSYSTEM)
CRT0_LIBS = -lgnuefi
else ifeq ($(ARCH),riscv64)
GNUEFI_ARCH = riscv64
GCC_ARCH = riscv64
CPU_ARCH = riscv64
CRT0_ARCH = riscv64
CROSS_COMPILE = $(GCC_ARCH)-linux-gnu-
EP_PREFIX =
CFLAGS = -fpic -fshort-wchar -Wno-pointer-to-int-cast
LDFLAGS = -Wl,--defsym=EFI_SUBSYSTEM=$(SUBSYSTEM)
CRT0_LIBS = -lgnuefi
endif
TOPDIR := $(dir $(lastword $(MAKEFILE_LIST)))
GNUEFI_DIR = $(TOPDIR)/gnu-efi
GNUEFI_LIBS = lib
GRUB_DIR = $(TOPDIR)/grub
SRC_DIR = $(TOPDIR)/src
GNUEFI_INC = $(GNUEFI_DIR)/inc
GNUEFI_LIBDIR = $(GNUEFI_DIR)/$(GNUEFI_ARCH)/lib
GNUEFI_LIB = $(GNUEFI_LIBDIR)/libefi.a
# If the compiler produces an elf binary, we need to fiddle with a PE crt0
ifneq ($(CRT0_LIBS),)
CRT0_DIR = $(GNUEFI_DIR)/$(GNUEFI_ARCH)/gnuefi
LDFLAGS += -L$(CRT0_DIR) -T $(GNUEFI_DIR)/gnuefi/elf_$(CRT0_ARCH)_efi.lds $(CRT0_DIR)/crt0-efi-$(CRT0_ARCH).o
GNUEFI_LIBS += gnuefi
endif
# SYSTEMROOT is only defined on Windows systems
ifneq ($(SYSTEMROOT),)
# MinGW on Windows doesn't use (tuple)-ar but (tuple)-gcc-ar
# so we remove the cross compiler tuple altogether
CROSS_COMPILE =
endif
CC := $(CROSS_COMPILE)gcc
OBJCOPY := $(CROSS_COMPILE)objcopy
CFLAGS += -fno-stack-protector -Wshadow -Wall -Wunused -Werror-implicit-function-declaration
CFLAGS += -Wno-pointer-sign # -funsigned-char does not work :(
CFLAGS += -I$(GNUEFI_DIR)/inc -I$(GNUEFI_DIR)/inc/$(GNUEFI_ARCH) -I$(GNUEFI_DIR)/inc/protocol
CFLAGS += -DCONFIG_$(GNUEFI_ARCH) -D__MAKEWITH_GNUEFI -DGNU_EFI_USE_MS_ABI -DNO_ZSTD -DNO_RAID_REBUILD
LDFLAGS += -L$(GNUEFI_DIR)/$(GNUEFI_ARCH)/lib -e $(EP_PREFIX)efi_main
LDFLAGS += -s -Wl,-Bsymbolic -nostdlib -shared
LIBS = -lefi $(CRT0_LIBS)
ifeq (, $(shell which $(CC)))
$(error The selected compiler ($(CC)) was not found)
endif
GCCVERSION := $(shell $(CC) -dumpversion | cut -f1 -d.)
GCCMINOR := $(shell $(CC) -dumpversion | cut -f2 -d.)
GCCMACHINE := $(shell $(CC) -dumpmachine)
GCCNEWENOUGH := $(shell ( [ $(GCCVERSION) -gt "4" ] \
|| ( [ $(GCCVERSION) -eq "4" ] \
&& [ $(GCCMINOR) -ge "7" ] ) ) \
&& echo 1)
ifneq ($(GCCNEWENOUGH),1)
$(error You need GCC 4.7 or later)
endif
ifneq ($(GCC_ARCH),$(findstring $(GCC_ARCH), $(GCCMACHINE)))
$(error The selected compiler ($(CC)) is not set for $(TARGET))
endif
ifdef DRIVERNAME
CFLAGS += -DDRIVERNAME=$(DRIVERNAME)
CFLAGS += -I$(GRUB_DIR) -I$(GRUB_DIR)/include -I$(GRUB_DIR)/grub-core/lib/minilzo
CFLAGS += -DGRUB_FILE=\"$(subst $(srcdir)/,,$<)\"
LDFLAGS += -shared -L$(GNUEFI_LIBDIR) -L$(GRUB_DIR) -e $(EP_PREFIX)InitializeDriver
LIBS += -lgrub -lefi
OBJS = utf8.o path.o missing.o logging.o grub_file.o this.o file.o driver.o \
$(GRUB_DIR)/grub-core/fs/fshelp.o $(GRUB_DIR)/grub-core/$(FSDIR)/$(DRIVERNAME).o
DRIVER = $(DRIVERNAME)_$(ARCH)
endif
ifdef EXTRAOBJS
OBJS += $(addprefix $(GRUB_DIR)/grub-core/$(FSDIR)/,$(EXTRAOBJS))
endif
ifdef EXTRAMODULE
CFLAGS += -DEXTRAMODULE=$(EXTRAMODULE)
OBJS += $(GRUB_DIR)/grub-core/$(EXTRAMODULEDIR)/$(EXTRAMODULE).o
endif
ifdef EXTRAMODULE2
CFLAGS += -DEXTRAMODULE2=$(EXTRAMODULE2)
OBJS += $(GRUB_DIR)/grub-core/$(EXTRAMODULE2DIR)/$(EXTRAMODULE2).o
endif
ifdef OBJS
# http://scottmcpeak.com/autodepend/autodepend.html
-include $(OBJS:.o=.d)
endif
$(GNUEFI_LIB):
$(MAKE) -C$(GNUEFI_DIR) CROSS_COMPILE=$(CROSS_COMPILE) ARCH=$(GNUEFI_ARCH) $(GNUEFI_LIBS)
.PHONY: driver clean.common clean.driver
driver: $(DRIVER).efi
$(DRIVER).efi: $(OBJS)
@echo [LD] $(notdir $@)
ifeq ($(CRT0_LIBS),)
@$(CC) $(LDFLAGS) $(OBJS) -o $(DRIVER).efi $(LIBS)
else
@$(CC) $(LDFLAGS) $(OBJS) -o $(DRIVER).elf $(LIBS)
@$(OBJCOPY) -j .text -j .sdata -j .data -j .dynamic -j .dynsym -j .rel* \
-j .rela* -j .reloc -j .eh_frame -O binary $(DRIVER).elf $@
@rm -f $(DRIVER).elf
endif
@chmod a-x $(DRIVER).efi
%.o: %.c
@echo [CC] $(notdir $@)
@$(CC) $(CFLAGS) -ffreestanding -c $< -o $@
@$(CC) -MM $(CFLAGS) $*.c > $*.d
clean.common:
$(MAKE) -C$(GNUEFI_DIR) ARCH=$(GNUEFI_ARCH) clean
$(shell find . | grep "\.d$$" | xargs rm -f 2>/dev/null)
clean.driver:
rm -f $(GRUB_DIR)/grub-core/fs/*.o $(GRUB_DIR)/grub-core/fs/*.d $(GRUB_DIR)/grub-core/io/*.o $(GRUB_DIR)/grub-core/io/*.d \
$(GRUB_DIR)/grub-core/fs/zfs/*.o $(GRUB_DIR)/grub-core/fs/zfs/*.d $(SRC_DIR)/*.o $(SRC_DIR)/*.d $(SRC_DIR)/*.so $(SRC_DIR)/*.efi