From 372553b319eb8ad0b1273cc061b13c18c6c7906a Mon Sep 17 00:00:00 2001
From: Martin Griffin <martinrgriffin@gmail.com>
Date: Mon, 26 May 2025 08:33:17 +0100
Subject: [PATCH] Explicit -std=gnu17 in CPPFLAGS to mirror CFLAGS (#6839)

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index f2128cc25d..224f6ada29 100644
--- a/Makefile
+++ b/Makefile
@@ -117,7 +117,7 @@ O_LEVEL ?= g
 else
 O_LEVEL ?= 2
 endif
-CPPFLAGS := $(INCLUDE_CPP_ARGS) -Wno-trigraphs -DMODERN=1 -DTESTING=$(TEST)
+CPPFLAGS := $(INCLUDE_CPP_ARGS) -Wno-trigraphs -DMODERN=1 -DTESTING=$(TEST) -std=gnu17
 ARMCC := $(PREFIX)gcc
 PATH_ARMCC := PATH="$(PATH)" $(ARMCC)
 CC1 := $(shell $(PATH_ARMCC) --print-prog-name=cc1) -quiet