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37a777e128
In case the build system builds a directory with empty Makefile, one which does not contain any obj-y entries, the build fails to link due to missing built-in.o . This happens because of this part of scripts/Makefile.build 81 ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),) 82 builtin-target := $(obj)/built-in.o 83 endif which does not assign builtin-target in case obj-y is empty. The built-in target is then not built at all, and built-in.o is not generated by this part of scripts/Makefile.build 325 ifdef builtin-target 326 quiet_cmd_link_o_target = AR $@ 327 # If the list of objects to link is empty, just create an empty built-in.o ... 335 targets += $(builtin-target) 336 endif # builtin-target This is the correct behavior. The final link however expects the built-in.o to exist in every directory included in the build, even in those where the aforementioned code skipped generation of built-in.o . Make sure the built-in.o does exist for every directory used in final link simply by doing touch on every built-in.o used for the link, which will create empty built-in.o in case any built-in.o is missing. A possible alternative fix is the always define the builtin-target and always generate built-in.o . Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org> Tested-by: Quentin Schulz <quentin.schulz@cherry.de>
75 lines
2.6 KiB
Makefile
75 lines
2.6 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0+
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# Copyright (c) 2011 The Chromium OS Authors.
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PLATFORM_CPPFLAGS += -D__SANDBOX__ -U_FORTIFY_SOURCE
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PLATFORM_CPPFLAGS += -fPIC -ffunction-sections -fdata-sections
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PLATFORM_LIBS += -lrt
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SDL_CONFIG ?= sdl2-config
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# Define this to avoid linking with SDL, which requires SDL libraries
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# This can solve 'sdl-config: Command not found' errors
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ifeq ($(CONFIG_SANDBOX_SDL),y)
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PLATFORM_LIBS += $(shell $(SDL_CONFIG) --libs)
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PLATFORM_CPPFLAGS += $(shell $(SDL_CONFIG) --cflags)
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endif
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SANITIZERS :=
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ifdef CONFIG_ASAN
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SANITIZERS += -fsanitize=address
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endif
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ifdef CONFIG_FUZZ
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SANITIZERS += -fsanitize=fuzzer
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endif
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KBUILD_CFLAGS += $(SANITIZERS)
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cmd_u-boot__ = \
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touch $(u-boot-main) ; \
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$(CC) -o $@ -Wl,-T u-boot.lds $(u-boot-init) \
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$(KBUILD_LDFLAGS:%=-Wl,%) \
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$(SANITIZERS) \
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$(LTO_FINAL_LDFLAGS) \
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-Wl,--whole-archive \
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$(u-boot-main) \
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$(u-boot-keep-syms-lto) \
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-Wl,--no-whole-archive \
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$(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map -Wl,--gc-sections
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cmd_u-boot-spl = (cd $(obj) && \
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touch $(patsubst $(obj)/%,%,$(u-boot-spl-main)) && \
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$(CC) -o $(SPL_BIN) -Wl,-T u-boot-spl.lds \
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$(KBUILD_LDFLAGS:%=-Wl,%) \
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$(SANITIZERS) \
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$(LTO_FINAL_LDFLAGS) \
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$(patsubst $(obj)/%,%,$(u-boot-spl-init)) \
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-Wl,--whole-archive \
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$(patsubst $(obj)/%,%,$(u-boot-spl-main)) \
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$(patsubst $(obj)/%,%,$(u-boot-spl-platdata)) \
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$(patsubst $(obj)/%,%,$(u-boot-spl-keep-syms-lto)) \
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-Wl,--no-whole-archive \
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$(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot-spl.map -Wl,--gc-sections)
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ifeq ($(HOST_ARCH),$(HOST_ARCH_X86_64))
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EFI_LDS := ${SRCDIR}/../../../arch/x86/lib/elf_x86_64_efi.lds
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EFI_TARGET := --target=efi-app-x86_64
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else ifeq ($(HOST_ARCH),$(HOST_ARCH_X86))
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EFI_LDS := ${SRCDIR}/../../../arch/x86/lib/elf_ia32_efi.lds
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EFI_TARGET := --target=efi-app-ia32
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else ifeq ($(HOST_ARCH),$(HOST_ARCH_AARCH64))
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EFI_LDS := ${SRCDIR}/../../../arch/arm/lib/elf_aarch64_efi.lds
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OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \
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-j __u_boot_list -j .rela.dyn -j .got -j .got.plt \
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-j .binman_sym_table -j .text_rest \
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-j .efi_runtime -j .efi_runtime_rel
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else ifeq ($(HOST_ARCH),$(HOST_ARCH_ARM))
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EFI_LDS := ${SRCDIR}/../../../arch/arm/lib/elf_arm_efi.lds
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OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
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-j .data -j .got -j .got.plt -j __u_boot_list -j .rel.dyn \
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-j .binman_sym_table -j .text_rest \
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-j .efi_runtime -j .efi_runtime_rel
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else ifeq ($(HOST_ARCH),$(HOST_ARCH_RISCV32))
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EFI_LDS := ${SRCDIR}/../../../arch/riscv/lib/elf_riscv32_efi.lds
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else ifeq ($(HOST_ARCH),$(HOST_ARCH_RISCV64))
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EFI_LDS := ${SRCDIR}/../../../arch/riscv/lib/elf_riscv64_efi.lds
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endif
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EFI_CRT0 := crt0_sandbox_efi.o
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EFI_RELOC := reloc_sandbox_efi.o
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