mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 01:38:22 +00:00
3b6407b8ed
As of clang-5.0, things have changed a bit. First, we cannot automatically guess -target values as if we do not pass one with CC then cc-option will fail. Second, to disable movt/movw relocations the argument has become -mno-movt. Related to the target part, we cannot use arm-none-eabi as that ends up being too generic of an ARM target for things like say rpi_3_32b to work. Signed-off-by: Tom Rini <trini@konsulko.com>
175 lines
4.8 KiB
Makefile
175 lines
4.8 KiB
Makefile
#
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# (C) Copyright 2000-2002
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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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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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