mk/efi.mk

   1 include $(MAKEDIR)/syslinux.mk
   2
   3 com32 = $(topdir)/com32
   4 core = $(topdir)/core
   5
   6 # Support IA32 and x86_64 platforms with one build
   7 # Set up architecture specifics; for cross compilation, set ARCH as apt
   8 # gnuefi sets up architecture specifics in ia32 or x86_64 sub directories
   9 # set up the LIBDIR and EFIINC for building for the appropriate architecture
  10 # For now, the following assumptions are made:
  11 # 1. gnu-efi lib for IA32 is installed in /usr/local/lib
  12 # and the include files in /usr/local/include/efi.
  13 # 2. gnu-efi lib for x86_64 is installed in /usr/lib
  14 # and the include files in /usr/include/efi.
  15 ifeq ($(ARCH),i386)
  16         SARCHOPT = -march=i386
  17         CARCHOPT = -m32 -march=i386
  18         EFI_SUBARCH = ia32
  19 endif
  20 ifeq ($(ARCH),x86_64)
  21         SARCHOPT = -march=x86-64
  22         CARCHOPT = -m64 -march=x86-64
  23         EFI_SUBARCH = $(ARCH)
  24 endif
  25
  26 EFIINC = $(shell $(topdir)/efi//find-gnu-efi.sh include $(EFI_SUBARCH))
  27 $(if $(EFIINC),, \
  28         $(error Missing $(EFI_SUBARCH) gnu-efi header files))
  29
  30 LIBDIR = $(shell $(topdir)/efi/find-gnu-efi.sh lib $(EFI_SUBARCH))
  31 $(if $(LIBDIR),, \
  32         $(error Missing $(EFI_SUBARCH) gnu-efi libraries))
  33
  34 #LIBDIR=/usr/lib
  35 FORMAT=efi-app-$(EFI_SUBARCH)
  36
  37 CFLAGS = -I$(EFIINC) -I$(EFIINC)/$(EFI_SUBARCH) \
  38                 -DEFI_FUNCTION_WRAPPER -fPIC -fshort-wchar -ffreestanding \
  39                 -Wall -I$(com32)/include -I$(com32)/include/sys \
  40                 -I$(core)/include -I$(core)/ $(CARCHOPT) \
  41                 -I$(com32)/lib/ -I$(com32)/libutil/include -std=gnu99 \
  42                 -DELF_DEBUG -DSYSLINUX_EFI \
  43                 $(GCCWARN) -D__COM32__ -mno-red-zone
  44
  45 # gnuefi sometimes installs these under a gnuefi/ directory, and sometimes not
  46 CRT0 := $(shell find $(LIBDIR) -name crt0-efi-$(EFI_SUBARCH).o 2>/dev/null | tail -n1)
  47 LDSCRIPT := $(shell find $(LIBDIR) -name elf_$(EFI_SUBARCH)_efi.lds 2>/dev/null | tail -n1)
  48
  49 LDFLAGS = -T $(SRC)/$(ARCH)/syslinux.ld -Bsymbolic -pie -nostdlib -znocombreloc \
  50                 -L$(LIBDIR) --hash-style=gnu -m elf_$(ARCH) $(CRT0) -E
  51
  52 SFLAGS     = $(GCCOPT) $(GCCWARN) $(SARCHOPT) \
  53              -fomit-frame-pointer -D__COM32__ \
  54              -nostdinc -iwithprefix include \
  55              -I$(com32)/libutil/include -I$(com32)/include -I$(com32)/include/sys $(GPLINCLUDE)
  56
  57 .PRECIOUS: %.o
  58 %.o: %.S
  59         $(CC) $(SFLAGS) -c -o $@ $<
  60
  61 .PRECIOUS: %.o
  62 %.o: %.c
  63         $(CC) $(CFLAGS) -c -o $@ $<
  64
  65 #%.efi: %.so
  66 #       $(OBJCOPY) -j .text -j .sdata -j .data -j .dynamic -j .dynsym -j .rel \
  67 #               -j .rela -j .reloc --target=$(FORMAT) $*.so $@