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 GCCOPT := $(call gcc_ok,-fno-stack-protector,)
  11 EFIINC = $(objdir)/include/efi
  12 LIBDIR  = $(objdir)/lib
  13
  14 ifeq ($(ARCH),i386)
  15         ARCHOPT = -m32 -march=i386
  16         EFI_SUBARCH = ia32
  17 endif
  18 ifeq ($(ARCH),x86_64)
  19         ARCHOPT = -m64 -march=x86-64
  20         EFI_SUBARCH = $(ARCH)
  21 endif
  22
  23 output = $(shell $(topdir)/efi/check-gnu-efi.sh $(EFI_SUBARCH) $(objdir))
  24 ifneq ($(output),)
  25 $(error Failed to build gnu-efi for $(EFI_SUBARCH))
  26 endif
  27
  28 #LIBDIR=/usr/lib
  29 FORMAT=efi-app-$(EFI_SUBARCH)
  30
  31 CFLAGS = -I$(EFIINC) -I$(EFIINC)/$(EFI_SUBARCH) \
  32                 -DEFI_FUNCTION_WRAPPER -fPIC -fshort-wchar -ffreestanding \
  33                 -Wall -I$(com32)/include -I$(com32)/include/sys \
  34                 -I$(core)/include -I$(core)/ $(ARCHOPT) \
  35                 -I$(com32)/lib/ -I$(com32)/libutil/include -std=gnu99 \
  36                 -DELF_DEBUG -DSYSLINUX_EFI -I$(objdir) \
  37                 $(GCCWARN) -D__COM32__ -mno-red-zone \
  38                 -DLDLINUX=\"$(LDLINUX)\" -fvisibility=hidden \
  39                 -Wno-unused-parameter $(GCCOPT)
  40
  41 CRT0 := $(LIBDIR)/crt0-efi-$(EFI_SUBARCH).o
  42 LDSCRIPT := $(LIBDIR)/elf_$(EFI_SUBARCH)_efi.lds
  43
  44 LDFLAGS = -T $(SRC)/$(ARCH)/syslinux.ld -Bsymbolic -pie -nostdlib -znocombreloc \
  45                 -L$(LIBDIR) --hash-style=gnu -m elf_$(ARCH) $(CRT0) -E
  46
  47 SFLAGS     = $(GCCOPT) $(GCCWARN) $(ARCHOPT) \
  48              -fomit-frame-pointer -D__COM32__ \
  49              -nostdinc -iwithprefix include \
  50              -I$(com32)/libutil/include -I$(com32)/include -I$(com32)/include/sys $(GPLINCLUDE)
  51
  52 %.o: %.S        # Cancel old rule
  53
  54 %.o: %.c
  55
  56 .PRECIOUS: %.o
  57 %.o: %.S
  58         $(CC) $(SFLAGS) -c -o $@ $<
  59
  60 .PRECIOUS: %.o
  61 %.o: %.c
  62         $(CC) $(CFLAGS) -c -o $@ $<
  63
  64 #%.efi: %.so
  65 #       $(OBJCOPY) -j .text -j .sdata -j .data -j .dynamic -j .dynsym -j .rel \
  66 #               -j .rela -j .reloc --target=$(FORMAT) $*.so $@