[OE-core] [PATCH v3] grub: add -Wno-error=trampolines to native CFLAGS

[Bill Randle]

(Resend as mailer munged previous submission. Also updated comments
to indicate problem is not limited to gcc 5.3.0.)

Adds -Wno-error=trampolines to native CFLAGS prevent multiple compile
errors when using gentoo builf of gcc.

[YOCTO #9201]

Signed-off-by: Bill Randle <william.c.randle at intel.com>
---
 meta/recipes-bsp/grub/grub-efi_2.00.bb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/meta/recipes-bsp/grub/grub-efi_2.00.bb b/meta/recipes-bsp/grub/grub-efi_2.00.bb
index 4e80e18..ca73234 100644
--- a/meta/recipes-bsp/grub/grub-efi_2.00.bb
+++ b/meta/recipes-bsp/grub/grub-efi_2.00.bb
@@ -35,6 +35,10 @@ EXTRA_OECONF = "--with-platform=efi --disable-grub-mkfont \
 
 EXTRA_OECONF += "${@bb.utils.contains('DISTRO_FEATURES', 'largefile', '--enable-largefile ac_cv_sizeof_off_t=8', '--disable-largefile', d)}"
 
+# ldm.c:114:7: error: trampoline generated for nested function 'hook' [-Werror=trampolines]
+# and many other places in the grub code when compiled with some native gcc compilers (specifically, gentoo)
+CFLAGS_append_class-native = " -Wno-error=trampolines"
+
 do_install_class-native() {
 	install -d ${D}${bindir}
 	install -m 755 grub-mkimage ${D}${bindir}
-- 
2.5.0