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The objtool build fails in a cross-compiled environment on a non-x86 host with "ARCH=x86_64": tools/objtool/objtool-in.o: In function `decode_instructions': tools/objtool/builtin-check.c:276: undefined reference to `arch_decode_instruction' We could override the ARCH environment variable and change it back to x86, similar to what the objtool Makefile was doing before; but it's tricky to override environment variables consistently. Instead, take a similar approach used by the Linux top-level Makefile and introduce a SRCARCH Makefile variable which evaluates to "x86" when ARCH is either "x86_64" or "x86". Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160722191920.ej62fnspnqurbaa7@treble Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
19 lines
410 B
Plaintext
19 lines
410 B
Plaintext
objtool-y += arch/$(SRCARCH)/
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objtool-y += builtin-check.o
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objtool-y += elf.o
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objtool-y += special.o
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objtool-y += objtool.o
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objtool-y += libstring.o
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objtool-y += str_error_r.o
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CFLAGS += -I$(srctree)/tools/lib
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$(OUTPUT)libstring.o: ../lib/string.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)str_error_r.o: ../lib/str_error_r.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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