Make.common

#
# Make.common
# Common make rules for building with gnu-efi
#

# This program is licensed under the terms of the GNU GPL, version 3,
# or (at your option) any later version.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

# This file contains make definitions common to several (or all) of the make
# files in the rEFInd code subdirectories. Some options are specific to
# particular architectures or build systems and others are more universal.

#
# Environment definitions -- where stuff is and what sort of system is being
# used to compile rEFInd....
#

EFIINC          = /usr/include/efi
GNUEFILIB       = /usr/lib
EFILIB          = /usr/lib
EFICRT0         = /usr/lib

# Comment out above and uncomment below if using locally-compiled GNU-EFI....
#EFIINC          = /usr/local/include/efi
#GNUEFILIB       = /usr/local/lib
#EFILIB          = /usr/local/lib
#EFICRT0         = /usr/local/lib

HOSTARCH        = $(shell uname -m | sed s,i[3456789]86,ia32,)
ARCH            ?= $(HOSTARCH)

# Note: TIANOBASE is defined in master Makefile and exported
GENFW           = $(TIANOBASE)/BaseTools/Source/C/bin/GenFw
prefix          = /usr/bin/
ifeq ($(ARCH),aarch64)
  CC            = $(prefix)aarch64-linux-gnu-gcc
  AS            = $(prefix)aarch64-linux-gnu-as
  LD            = $(prefix)aarch64-linux-gnu-ld
  AR            = $(prefix)aarch64-linux-gnu-ar
  RANLIB        = $(prefix)aarch64-linux-gnu-ranlib
  OBJCOPY       = $(prefix)aarch64-linux-gnu-objcopy
else
  CC            = $(prefix)gcc
  AS            = $(prefix)as
  LD            = $(prefix)ld
  AR            = $(prefix)ar
  RANLIB        = $(prefix)ranlib
  OBJCOPY       = $(prefix)objcopy
endif

ifeq ($(MAKEWITH),TIANO)
# Below file defines TARGET (RELEASE or DEBUG) and TOOL_CHAIN_TAG (GCC44, GCC45, GCC46, or GCC47)
include $(TIANOBASE)/Conf/target.txt
endif

#
# C compiler flags
#

# ...for both GNU-EFI and TianoCore....
OPTIMFLAGS      = -Os -fno-strict-aliasing
CFLAGS          = $(OPTIMFLAGS) -fno-stack-protector -fshort-wchar -Wall

# ...for GNU-EFI....
GNUEFI_CFLAGS   = -fpic -I$(EFIINC) -I$(EFIINC)/$(ARCH) -I$(EFIINC)/protocol -I../include -I../refind -I../libeg -I../mok

# ...and for TianoCore....
TIANO_INCLUDE_DIRS = -I $(TIANOBASE)/MdePkg \
                     -I $(TIANOBASE)/MdePkg/Include \
                     -I $(TIANOBASE)/MdeModulePkg/ \
                     -I $(TIANOBASE)/MdeModulePkg/Include \
                     -I $(TIANOBASE)/IntelFrameworkPkg/Include \
                     -I $(TIANOBASE)/MdePkg/Include/$(ARCHDIR) \
                     -I .. \
                     -I ../refind \
                     -I ../libeg \
                     -I ../include \
                     -I ../mok
#
# Linker flags
#

# for GNU-EFI....
SUBSYSTEM_LDFLAG  =
GNUEFI_LDSCRIPT   = $(EFICRT0)/elf_$(ARCH)_efi.lds
CRTOBJS           = $(EFICRT0)/crt0-efi-$(ARCH).o
GNUEFI_LDFLAGS    = -T $(GNUEFI_LDSCRIPT) -shared -Bsymbolic -nostdlib -L$(EFILIB) -L$(GNUEFILIB) $(CRTOBJS)
GNUEFI_LIBS       = -lefi -lgnuefi $(shell $(CC) -print-libgcc-file-name)
#LIBS            = -lefi -lgnuefi $(shell $(CC) $(ARCH3264) -print-libgcc-file-name)

# ...and for TianoCore....
ENTRYPOINT=efi_main
TIANO_LDSCRIPT   = $(TIANOBASE)/BaseTools/Scripts/GccBase.lds
TIANO_LDFLAGS   = -nostdlib -n -q --gc-sections --script=$(TIANO_LDSCRIPT) \
                  --entry $(ENTRYPOINT) -u $(ENTRYPOINT) -m $(LD_CODE)

#
# objcopy flags for GNU-EFI
#

FORMAT          = --target=efi-app-$(ARCH)
FORMAT_DRIVER   = --target=efi-bsdrv-$(ARCH)

#
# Modifications on a per-architecture basis....
#

ifeq ($(ARCH),x86_64)
  GNUEFI_LDFLAGS += -znocombreloc -zdefs

  ARCH_CFLAGS = -DEFIX64 -DEFI_FUNCTION_WRAPPER -m64 -mno-red-zone
ifeq ($(MAKEWITH),TIANO)
  ARCH_CFLAGS += -mcmodel=large "-DEFIAPI=__attribute__((ms_abi))"
endif
  ARCHDIR = X64
  UC_ARCH = X64
  FILENAME_CODE = x64
  LD_CODE = elf_x86_64
endif

ifeq ($(ARCH),ia32)
  GNUEFI_LDFLAGS += -znocombreloc -zdefs

  # In practice, cross-compiling filesystem drivers works, but not the main
  # rEFInd binary....
  ifeq ($(HOSTARCH),x86_64)
    GNUEFILIB := $(GNUEFILIB)32
    EFILIB    := $(EFILIB)32
    EFICRT0   := $(EFICRT0)32
  endif

  ARCH_CFLAGS = -m32 -DEFI32 -malign-double
  ARCHDIR = Ia32
  UC_ARCH = IA32
  FILENAME_CODE = ia32
  LD_CODE = elf_i386
endif

ifeq ($(ARCH), aarch64)
  GNUEFI_CFLAGS += -DEFIAARCH64
  FORMAT          = -O binary
  FORMAT_DRIVER   = -O binary
  SUBSYSTEM_LDFLAG = -defsym=EFI_SUBSYSTEM=0xa
  LDFLAGS         += --warn-common --no-undefined --fatal-warnings

  ARCH_CFLAGS = -fno-merge-constants -ffreestanding -DEFIAARCH64
  ifeq ($(MAKEWITH),TIANO)
    ARCH_CFLAGS += -mcmodel=large -Wno-address -Wno-missing-braces -Wno-array-bounds -ffunction-sections -fdata-sections
  endif
  ifeq ($(MAKEWITH),GNUEFI)
    ARCH_CFLAGS += -fno-stack-check
  endif
  ARCHDIR = AArch64
  UC_ARCH = AARCH64
  FILENAME_CODE = aa64
  LD_CODE = aarch64elf
endif

# GNU-EFI compilation path uses .o files for compiled object code
%.o: %.c
	$(CC) $(CFLAGS) $(ARCH_CFLAGS) $(GNUEFI_CFLAGS) $(LOCAL_GNUEFI_CFLAGS) \
	      -D__MAKEWITH_GNUEFI -c $< -o $@

# TianoCore compilation path uses .obj files for compiled object code
%.obj: %.c
	$(CC) $(CFLAGS) $(ARCH_CFLAGS) $(TIANO_INCLUDE_DIRS) -DNO_BUILTIN_VA_FUNCS \
	      -D__MAKEWITH_TIANO -c $< -o $@

# rules for EFI applications

ifneq (,$(filter %.efi,$(TARGET)))

SHLIB_TARGET = $(subst .efi,.so,$(TARGET))

endif


# rules for libraries

ifneq (,$(filter %.a,$(TARGET)))

$(TARGET): $(OBJS)
	$(AR) cq $@ $(OBJS)

endif

# utility rules

#clean:
#	rm -f $(TARGET) *~ *.so $(OBJS) *.efi *.obj refind_*.txt refind_*.dll *.lib

# EOF