[OE-core] [PATCH 2/7] kernel: fix out of tree module builds

[Bruce Ashfield]

With the kernel build optimizations, we no longer copy the source from
the built kernel into the staging dir, since the kernel is unpacked and built
directly from the staging dir.

This means that a few build artifacts need to be restored to allow out of
tree modules to once again build.

Signed-off-by: Bruce Ashfield <bruce.ashfield at windriver.com>
---
 meta/classes/kernel.bbclass | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index 0d335a589121..348041449cb0 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -223,6 +223,28 @@ kernel_do_install() {
 	#
 
 	echo "${KERNEL_VERSION}" > $kerneldir/kernel-abiversion
+	
+	# Copy files required for module builds
+	cp System.map $kerneldir/System.map-${KERNEL_VERSION}
+	cp Module.symvers $kerneldir/
+	cp .config $kerneldir/
+	mkdir -p $kerneldir/include/config
+	cp include/config/kernel.release $kerneldir/include/config/kernel.release
+
+	# As of Linux kernel version 3.0.1, the clean target removes
+	# arch/powerpc/lib/crtsavres.o which is present in
+	# KBUILD_LDFLAGS_MODULE, making it required to build external modules.
+	if [ ${ARCH} = "powerpc" ]; then
+		cp arch/powerpc/lib/crtsavres.o $kerneldir/arch/powerpc/lib/crtsavres.o
+	fi
+
+	mkdir -p $kerneldir/include/generated/
+	cp -fR include/generated/* $kerneldir/include/generated/
+
+	if [ -d arch/${ARCH}/include/generated ]; then
+		mkdir -p $kerneldir/arch/${ARCH}/include/generated/
+		cp -fR arch/${ARCH}/include/generated/* $kerneldir/arch/${ARCH}/include/generated/
+	fi
 }
 do_install[prefuncs] += "package_get_auto_pr"
 
-- 
2.1.0