79 lines
2.1 KiB
Makefile
79 lines
2.1 KiB
Makefile
#
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# (C) Copyright 2003
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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ifdef CONFIG_SYS_BIG_ENDIAN
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32bit-emul := elf32btsmip
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64bit-emul := elf64btsmip
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32bit-bfd := elf32-tradbigmips
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64bit-bfd := elf64-tradbigmips
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PLATFORM_CPPFLAGS += -EB
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PLATFORM_LDFLAGS += -EB
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endif
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ifdef CONFIG_SYS_LITTLE_ENDIAN
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32bit-emul := elf32ltsmip
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64bit-emul := elf64ltsmip
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32bit-bfd := elf32-tradlittlemips
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64bit-bfd := elf64-tradlittlemips
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PLATFORM_CPPFLAGS += -EL
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PLATFORM_LDFLAGS += -EL
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endif
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ifdef CONFIG_32BIT
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PLATFORM_CPPFLAGS += -mabi=32
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PLATFORM_LDFLAGS += -m $(32bit-emul)
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OBJCOPYFLAGS += -O $(32bit-bfd)
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endif
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ifdef CONFIG_64BIT
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PLATFORM_CPPFLAGS += -mabi=64
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PLATFORM_LDFLAGS += -m$(64bit-emul)
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OBJCOPYFLAGS += -O $(64bit-bfd)
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endif
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PLATFORM_CPPFLAGS += -D__MIPS__
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#
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# From Linux arch/mips/Makefile
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#
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# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
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# code since it only slows down the whole thing. At some point we might make
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# use of global pointer optimizations but their use of $28 conflicts with
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# the current pointer optimization.
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#
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# The DECStation requires an ECOFF kernel for remote booting, other MIPS
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# machines may also. Since BFD is incredibly buggy with respect to
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# crossformat linking we rely on the elf2ecoff tool for format conversion.
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#
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# cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
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# cflags-y += -msoft-float
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# LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
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# MODFLAGS += -mlong-calls
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#
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# On the other hand, we want PIC in the U-Boot code to relocate it from ROM
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# to RAM. $28 is always used as gp.
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#
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ifdef CONFIG_SPL_BUILD
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PF_ABICALLS := -mno-abicalls
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PF_PIC := -fno-pic
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PF_PIE :=
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else
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PF_ABICALLS := -mabicalls
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PF_PIC := -fpic
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PF_PIE := -pie
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PF_OBJCOPY := -j .got -j .rel.dyn -j .padding
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PF_OBJCOPY += -j .dtb.init.rodata
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endif
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PLATFORM_CPPFLAGS += -G 0 $(PF_ABICALLS) $(PF_PIC)
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PLATFORM_CPPFLAGS += -msoft-float
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PLATFORM_LDFLAGS += -G 0 -static -n -nostdlib
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PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
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LDFLAGS_FINAL += --gc-sections $(PF_PIE)
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OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list
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OBJCOPYFLAGS += $(PF_OBJCOPY)
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