- linux-kernel: pick LINUX_DROP_YYLLOC on-the-fly-patch from buildroot

make/linux-kernel.mk

@@ -201,6 +201,12 @@ $(DL_DIR)/$(VMLINUZ_INITRD_SOURCE):
 
 # -----------------------------------------------------------------------------
 
+# Older versions break on gcc 10+ because of redefined symbols
+define LINUX_DROP_YYLLOC
+	$(Q)grep -Z -l -r -E '^YYLTYPE yylloc;$$' $(BUILD_DIR)/$(KERNEL_DIR) \
+	| xargs -0 -r $(SED) '/^YYLTYPE yylloc;$$/d'
+endef
+
 kernel.do_checkout: $(SOURCE_DIR)/$(NI_LINUX_KERNEL)
 	$(CD) $(SOURCE_DIR)/$(NI_LINUX_KERNEL); \
 		git checkout $(KERNEL_BRANCH)
@@ -230,6 +236,7 @@ kernel.do_prepare_tar: $(DL_DIR)/$(KERNEL_SOURCE)
 	$(REMOVE)/$(KERNEL_DIR)
 	$(UNTAR)/$(KERNEL_SOURCE)
 	$(call APPLY_PATCHES,$(KERNEL_PATCH))
+	$(LINUX_DROP_YYLLOC)
 
 kernel.do_compile: kernel.do_prepare
 	$(MAKE) -C $(BUILD_DIR)/$(KERNEL_DIR) $(KERNEL_MAKE_VARS) modules $(KERNEL_MAKE_TARGETS)