kernel: Add kernel specific OBJDUMP

This helps in switching toolchains cleanly for kernel build
between gcc and clang

Currently, some kernels allow building with clang but not all
the distro might use clang as default system compiler but kernel
may demand gcc which is provided via KERNEL_* variables, however
kernel does use OBJCOPY at places during build and it maybe set
to use llvm objcopy when using clang. That should be a deliberate
setting when clang is used for kernel as well, otherwise it should
use binutils provided objcopy

(From OE-Core rev: 17b409f2fd97894e0943d13c2cb0d52abde647e3)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 4 insertions, 3 deletions

diff --git a/meta/recipes-kernel/make-mod-scripts/make-mod-scripts_1.0.bb b/meta/recipes-kernel/make-mod-scripts/make-mod-scripts_1.0.bb
index 38282e58f1..28e0807d1d 100644
--- a/meta/recipes-kernel/make-mod-scripts/make-mod-scripts_1.0.bb
+++ b/meta/recipes-kernel/make-mod-scripts/make-mod-scripts_1.0.bb
@@ -27,7 +27,8 @@ EXTRA_OEMAKE += " HOSTCXX="${BUILD_CXX} ${BUILD_CXXFLAGS} ${BUILD_LDFLAGS}" CROS
 do_configure() {
         unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS
         for t in prepare scripts_basic scripts; do
-                oe_runmake CC="${KERNEL_CC}" LD="${KERNEL_LD}" AR="${KERNEL_AR}" \
+                oe_runmake CC="${KERNEL_CC}" LD="${KERNEL_LD}" \
+                AR="${KERNEL_AR}" OBJCOPY="${KERNEL_OBJCOPY}" \
                 -C ${STAGING_KERNEL_DIR} O=${STAGING_KERNEL_BUILDDIR} $t
         done
 }
diff --git a/meta/recipes-kernel/systemtap/systemtap-uprobes_git.bb b/meta/recipes-kernel/systemtap/systemtap-uprobes_git.bb
index 2181e45a8d..efe359ec32 100644
--- a/meta/recipes-kernel/systemtap/systemtap-uprobes_git.bb
+++ b/meta/recipes-kernel/systemtap/systemtap-uprobes_git.bb
@@ -21,12 +21,12 @@ do_compile() {
         then
                 unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS CC LD CPP
                 oe_runmake CC="${KERNEL_CC}" LD="${KERNEL_LD}" \
-                           AR="${KERNEL_AR}" \
+                           AR="${KERNEL_AR}" OBJCOPY="${KERNEL_OBJCOPY}" \
                            -C ${STAGING_KERNEL_DIR} scripts
                 oe_runmake KDIR=${STAGING_KERNEL_DIR}   \
                            M="${S}/runtime/uprobes/" \
                            CC="${KERNEL_CC}" LD="${KERNEL_LD}" \
-                           AR="${KERNEL_AR}" \
+                           AR="${KERNEL_AR}" OBJCOPY="${KERNEL_OBJCOPY}" \
                            -C "${S}/runtime/uprobes/"
         fi
 }