mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 10:46:15 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
174 lines
4.8 KiB
Makefile
174 lines
4.8 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0+
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#
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# (C) Copyright 2000-2002
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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ifndef CONFIG_STANDALONE_LOAD_ADDR
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ifneq ($(CONFIG_ARCH_OMAP2PLUS),)
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CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
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else
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CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
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endif
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endif
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CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections
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CFLAGS_EFI := -fpic -fshort-wchar
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LDFLAGS_FINAL += --gc-sections
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PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \
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-fno-common -ffixed-r9
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PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \
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$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
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# LLVM support
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LLVM_RELFLAGS := $(call cc-option,-mllvm,) \
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$(call cc-option,-mno-movt,)
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PLATFORM_RELFLAGS += $(LLVM_RELFLAGS)
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PLATFORM_CPPFLAGS += -D__ARM__
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ifdef CONFIG_ARM64
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PLATFORM_ELFFLAGS += -B aarch64 -O elf64-littleaarch64
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else
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PLATFORM_ELFFLAGS += -B arm -O elf32-littlearm
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endif
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# Choose between ARM/Thumb instruction sets
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ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
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AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always)
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PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \
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$(call cc-option, -mthumb -mthumb-interwork,\
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$(call cc-option,-marm,)\
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$(call cc-option,-mno-thumb-interwork,)\
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)
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else
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PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
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$(call cc-option,-mno-thumb-interwork,)
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endif
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# Only test once
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ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
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archprepare: checkthumb checkgcc6
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checkthumb:
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@if test "$(call cc-name)" = "gcc" -a \
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"$(call cc-version)" -lt "0404"; then \
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echo -n '*** Your GCC does not produce working '; \
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echo 'binaries in THUMB mode.'; \
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echo '*** Your board is configured for THUMB mode.'; \
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false; \
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fi
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else
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archprepare: checkgcc6
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endif
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checkgcc6:
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@if test "$(call cc-name)" = "gcc" -a \
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"$(call cc-version)" -lt "0600"; then \
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echo '*** Your GCC is older than 6.0 and is not supported'; \
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false; \
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fi
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# Try if EABI is supported, else fall back to old API,
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# i. e. for example:
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# - with ELDK 4.2 (EABI supported), use:
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# -mabi=aapcs-linux
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# - with ELDK 4.1 (gcc 4.x, no EABI), use:
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# -mabi=apcs-gnu
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# - with ELDK 3.1 (gcc 3.x), use:
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# -mapcs-32
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PF_CPPFLAGS_ABI := $(call cc-option,\
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-mabi=aapcs-linux,\
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$(call cc-option,\
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-mapcs-32,\
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$(call cc-option,\
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-mabi=apcs-gnu,\
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)\
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)\
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)
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PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
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# For EABI, make sure to provide raise()
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ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
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# This file is parsed many times, so the string may get added multiple
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# times. Also, the prefix needs to be different based on whether
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# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
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# before adding the correct one.
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PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \
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$(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
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endif
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# needed for relocation
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LDFLAGS_u-boot += -pie
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#
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# FIXME: binutils versions < 2.22 have a bug in the assembler where
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# branches to weak symbols can be incorrectly optimized in thumb mode
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# to a short branch (b.n instruction) that won't reach when the symbol
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# gets preempted
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#
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# http://sourceware.org/bugzilla/show_bug.cgi?id=12532
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#
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ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
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ifeq ($(GAS_BUG_12532),)
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export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
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then echo y; else echo n; fi)
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endif
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ifeq ($(GAS_BUG_12532),y)
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PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
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endif
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endif
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ifneq ($(CONFIG_SPL_BUILD),y)
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# Check that only R_ARM_RELATIVE relocations are generated.
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ALL-y += checkarmreloc
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# The movt / movw can hardcode 16 bit parts of the addresses in the
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# instruction. Relocation is not supported for that case, so disable
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# such usage by requiring word relocations.
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PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
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PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic)
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endif
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# limit ourselves to the sections we want in the .bin.
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ifdef CONFIG_ARM64
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OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \
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-j .u_boot_list -j .rela.dyn -j .got -j .got.plt \
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-j .binman_sym_table
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else
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OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
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-j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn \
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-j .binman_sym_table
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endif
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# if a dtb section exists we always have to include it
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# there are only two cases where it is generated
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# 1) OF_EMBEDED is turned on
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# 2) unit tests include device tree blobs
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OBJCOPYFLAGS += -j .dtb.init.rodata
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ifdef CONFIG_EFI_LOADER
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OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel
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endif
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ifneq ($(CONFIG_IMX_CONFIG),)
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ifdef CONFIG_SPL
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ifndef CONFIG_SPL_BUILD
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ALL-y += SPL
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endif
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else
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ifeq ($(CONFIG_OF_SEPARATE),y)
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ALL-y += u-boot-dtb.imx
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else
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ALL-y += u-boot.imx
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endif
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endif
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ifneq ($(CONFIG_VF610),)
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ALL-y += u-boot.vyb
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endif
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endif
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EFI_LDS := elf_arm_efi.lds
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EFI_CRT0 := crt0_arm_efi.o
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EFI_RELOC := reloc_arm_efi.o
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