[OE-core] [PATCH] kernel: add objtool to shared workdir

[Justin Bronder]

With CONFIG_UNWINDER_ORC (the default in 4.14), objtool is required for
out-of-tree modules to be able to generate object files.

For instance, meta-skeleton/hello-mod fails with:
    | make[3]: *** No rule to make target 'tools/objtool/objtool', needed by ...

Signed-off-by: Justin Bronder <jsbronder at cold-front.org>
---
 meta/classes/kernel.bbclass | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index 943938df0e..5cdff581ef 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -479,6 +479,13 @@ do_shared_workdir () {
 		mkdir -p $kerneldir/arch/${ARCH}/include/generated/
 		cp -fR arch/${ARCH}/include/generated/* $kerneldir/arch/${ARCH}/include/generated/
 	fi
+
+	# With CONFIG_UNWINDER_ORC (the default in 4.14), objtool is required for
+	# out-of-tree modules to be able to generate object files.
+	if [ -x tools/objtool/objtool ]; then
+		mkdir -p ${kerneldir}/tools/objtool
+		cp tools/objtool/objtool ${kerneldir}/tools/objtool/
+	fi
 }
 
 # We don't need to stage anything, not the modules/firmware since those would clash with linux-firmware
-- 
2.13.6