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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 <[email protected]>
Signed-off-by: Josh Poimboeuf <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/20160722191920.ej62fnspnqurbaa7@treble
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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For tools that needs to be always compiled with the host headers.
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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After this patch other directories can use this architecture detector
without directly including it from perf's directory. Libbpf would
utilize it to get proper $(ARCH) so it can receive correct uapi include
directory.
Tested-by: Naveen N. Rao <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Sukadev Bhattiprolu <[email protected]>
Cc: Zefan Li <[email protected]>
Cc: [email protected]
Signed-off-by: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
[ Add missing srctree definition in tests/make ]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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