From da9d760ea1c0450e9e6b1c0cdd5331e633c75887 Mon Sep 17 00:00:00 2001
From: Syrone Wong <wong.syrone@gmail.com>
Date: Thu, 21 Jun 2018 23:08:11 +0800
Subject: [PATCH] rules.mk: replace iremap when using GCC 8

The original -iremap is replaced by -fmacro-prefix-map in GCC 8

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>
---
 rules.mk | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/rules.mk b/rules.mk
index b1ecc24fab..d90e0ffed0 100644
--- a/rules.mk
+++ b/rules.mk
@@ -141,6 +141,10 @@ endif
 
 ifeq ($(or $(CONFIG_EXTERNAL_TOOLCHAIN),$(CONFIG_GCC_VERSION_4_8),$(CONFIG_TARGET_uml)),)
   iremap = -iremap$(1):$(2)
+  # just overwrite iremap for GCC 8.1 and higher to keep backward compatibility
+  ifeq ($(CONFIG_GCC_VERSION_8),y)
+    iremap = -fmacro-prefix-map=$(1)=$(2)
+  endif
 endif
 
 PACKAGE_DIR:=$(BIN_DIR)/packages