kernel.bbclass: unset LDFLAGS when run devshell in kernel recipe

When user runs devshell in kernel recipe and compiles kernel,
this will fail by unrecognized option of LD.

----
$ make
...
arm-poky-linux-gnueabi-ld: unrecognized option '-Wl,-O1'
arm-poky-linux-gnueabi-ld: use the --help option for usage information
----

This set to empty LDFLAGS when user runs the devshell, and solve this problem.

(From OE-Core rev: e36ac3ab3a7fe02c7eeb3998ff33c001ab795841)

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index 4acfb7e2b6..f40ea8985d 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -147,6 +147,11 @@ do_bundle_initramfs () {
         fi
 }
 do_bundle_initramfs[nostamp] = "1"
+
+python do_devshell_prepend () {
+    os.environ["LDFLAGS"] = ''
+}
+
 addtask bundle_initramfs after do_compile
 
 kernel_do_compile() {