arch/mips/config.mk

   1 #
   2 # (C) Copyright 2003
   3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 #
   5 # SPDX-License-Identifier:      GPL-2.0+
   6 #
   7
   8 ifdef CONFIG_SYS_BIG_ENDIAN
   9 32bit-emul              := elf32btsmip
  10 64bit-emul              := elf64btsmip
  11 32bit-bfd               := elf32-tradbigmips
  12 64bit-bfd               := elf64-tradbigmips
  13 PLATFORM_CPPFLAGS       += -EB
  14 PLATFORM_LDFLAGS        += -EB
  15 endif
  16
  17 ifdef CONFIG_SYS_LITTLE_ENDIAN
  18 32bit-emul              := elf32ltsmip
  19 64bit-emul              := elf64ltsmip
  20 32bit-bfd               := elf32-tradlittlemips
  21 64bit-bfd               := elf64-tradlittlemips
  22 PLATFORM_CPPFLAGS       += -EL
  23 PLATFORM_LDFLAGS        += -EL
  24 endif
  25
  26 ifdef CONFIG_32BIT
  27 PLATFORM_CPPFLAGS       += -mabi=32
  28 PLATFORM_LDFLAGS        += -m $(32bit-emul)
  29 OBJCOPYFLAGS            += -O $(32bit-bfd)
  30 endif
  31
  32 ifdef CONFIG_64BIT
  33 PLATFORM_CPPFLAGS       += -mabi=64
  34 PLATFORM_LDFLAGS        += -m$(64bit-emul)
  35 OBJCOPYFLAGS            += -O $(64bit-bfd)
  36 endif
  37
  38 PLATFORM_CPPFLAGS += -D__MIPS__
  39
  40 #
  41 # From Linux arch/mips/Makefile
  42 #
  43 # GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
  44 # code since it only slows down the whole thing.  At some point we might make
  45 # use of global pointer optimizations but their use of $28 conflicts with
  46 # the current pointer optimization.
  47 #
  48 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
  49 # machines may also.  Since BFD is incredibly buggy with respect to
  50 # crossformat linking we rely on the elf2ecoff tool for format conversion.
  51 #
  52 # cflags-y                      += -G 0 -mno-abicalls -fno-pic -pipe
  53 # cflags-y                      += -msoft-float
  54 # LDFLAGS_vmlinux               += -G 0 -static -n -nostdlib
  55 # MODFLAGS                      += -mlong-calls
  56 #
  57 # On the other hand, we want PIC in the U-Boot code to relocate it from ROM
  58 # to RAM. $28 is always used as gp.
  59 #
  60 ifdef CONFIG_SPL_BUILD
  61 PF_ABICALLS                     := -mno-abicalls
  62 PF_PIC                          := -fno-pic
  63 PF_PIE                          :=
  64 else
  65 PF_ABICALLS                     := -mabicalls
  66 PF_PIC                          := -fpic
  67 PF_PIE                          := -pie
  68 PF_OBJCOPY                      := -j .got -j .u_boot_list -j .rel.dyn -j .padding
  69 PF_OBJCOPY                      += -j .dtb.init.rodata
  70 endif
  71
  72 PLATFORM_CPPFLAGS               += -G 0 $(PF_ABICALLS) $(PF_PIC)
  73 PLATFORM_CPPFLAGS               += -msoft-float
  74 PLATFORM_LDFLAGS                += -G 0 -static -n -nostdlib
  75 PLATFORM_RELFLAGS               += -ffunction-sections -fdata-sections
  76 LDFLAGS_FINAL                   += --gc-sections $(PF_PIE)
  77 OBJCOPYFLAGS                    += -j .text -j .rodata -j .data $(PF_OBJCOPY)