From e31e1a5a3f15b2f2808ebc1dc2702d98775b4b45 Mon Sep 17 00:00:00 2001
From: Luca Boccassi <luca.boccassi@microsoft.com>
Date: Thu, 28 Mar 2019 19:33:17 +0000
Subject: [PATCH] Makefile: pass CPPFLAGS to the compiler

Distro tools like dpkg-buildpackage use the preprocessor flags to pass
important flags, like hardening features. Pass CPPFLAGS to CC.

Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
---
 src/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Makefile b/src/Makefile
index fab4c6f..51b52e8 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -63,7 +63,7 @@ $(OBJDIR)/libbpf.pc:
 		< libbpf.pc.template > $@
 
 $(OBJDIR)/%.o: %.c
-	$(CC) $(ALL_CFLAGS) -c $< -o $@
+	$(CC) $(ALL_CFLAGS) $(CPPFLAGS) -c $< -o $@
 
 define do_install
 	if [ ! -d '$(DESTDIR)$2' ]; then		\