From 0403a1baf5bd94f5450ff647a69098a64fdbf3ae Mon Sep 17 00:00:00 2001
From: Neal Jackson <neal.jackson@berkeley.edu>
Date: Mon, 29 Jan 2018 08:12:27 -0800
Subject: [PATCH] [nrf52840] add conditional -Wno-expansion-to-defined for GCC7
 (#2514)

---
 examples/Makefile-nrf52840 | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/examples/Makefile-nrf52840 b/examples/Makefile-nrf52840
index d58f5c4ce..c1c14226b 100644
--- a/examples/Makefile-nrf52840
+++ b/examples/Makefile-nrf52840
@@ -40,6 +40,7 @@ RANLIB                          = arm-none-eabi-ranlib
 OBJCOPY                         = arm-none-eabi-objcopy
 
 BuildJobs                      ?= 10
+GCCVersion                      = $(shell expr `$(CC) -dumpversion | cut -f1 -d.`)
 
 configure_OPTIONS                                 = \
     --enable-cli-app=all                            \
@@ -87,6 +88,10 @@ ifeq ($(USB),1)
 COMMONCFLAGS += -DUSB_CDC_AS_SERIAL_TRANSPORT=1
 endif
 
+ifeq ($(shell expr $(GCCVersion) \>= 7), 1)
+    COMMONCFLAGS += -Wno-expansion-to-defined
+endif
+
 CPPFLAGS                       += \
     $(COMMONCFLAGS)               \
     $(target_CPPFLAGS)            \