From c6f9780b1b3974b888555d1bc90a9e88af550211 Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Sun, 29 Aug 2021 15:36:52 +0900
Subject: [PATCH] Add accidentally deleted BPFCFLAGS

---
 configure.ac | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/configure.ac b/configure.ac
index f0e63951..5116675f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -556,6 +556,9 @@ if test "x${request_libbpf}" != "xno"; then
                     [have_libbpf=no])
   if test "x${have_libbpf}" = "xyes"; then
     AC_DEFINE([HAVE_LIBBPF], [1], [Define to 1 if you have `libbpf` library.])
+    if test "x${BPFCFLAGS}" = "x"; then
+      BPFCFLAGS="-Wall -O2"
+    fi
     # Add the include path for Debian
     EXTRABPFCFLAGS="-I/usr/include/$host_cpu-$host_os"
     AC_SUBST([EXTRABPFCFLAGS])