package/dtc/0001-Fix-include-guards-for-older-kernel-u-boot-sources.patch

From b1f8b84489c96465b63485b884238b61d31ca84d Mon Sep 17 00:00:00 2001
From: Lothar Felten <lothar.felten@gmail.com>
Date: Mon, 8 Oct 2018 13:29:44 +0200
Subject: [PATCH 1/1] Fix include guards for older kernel/u-boot sources

Linux kernels before 4.17 and U-Boot versions before 2018.07 use libfdt
include guards with leading underscores.

Those have been removed in dtc-1.4.7.

This patch handles both include guard types and allows the compilation
of older Linux kernel and u-boot sources.

Signed-off-by: Lothar Felten <lothar.felten@gmail.com>
---
 libfdt/libfdt.h     | 4 ++++
 libfdt/libfdt_env.h | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/libfdt/libfdt.h b/libfdt/libfdt.h
index 830b77e..bef4566 100644
--- a/libfdt/libfdt.h
+++ b/libfdt/libfdt.h
@@ -1,3 +1,7 @@
+#ifdef _LIBFDT_H
+#warning "Please consider updating your kernel and/or u-boot version"
+#define LIBFDT_H
+#endif
 #ifndef LIBFDT_H
 #define LIBFDT_H
 /*
diff --git a/libfdt/libfdt_env.h b/libfdt/libfdt_env.h
index eb20538..6a61e6a 100644
--- a/libfdt/libfdt_env.h
+++ b/libfdt/libfdt_env.h
@@ -1,3 +1,7 @@
+#ifdef _LIBFDT_ENV_H
+#warning "Please consider updating your kernel and/or u-boot version"
+#define LIBFDT_ENV_H
+#endif
 #ifndef LIBFDT_ENV_H
 #define LIBFDT_ENV_H
 /*
-- 
2.11.0