From 3877722a08a7be0e847ca660b5be5113a54e22e1 Mon Sep 17 00:00:00 2001
From: chenliangyu <chenliangyu@ultipa.com>
Date: Fri, 17 Mar 2023 15:00:12 +0800
Subject: [PATCH] fix compile error on centos 7.5

---
 Makefile | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 1601079a4..bfa3508ef 100644
--- a/Makefile
+++ b/Makefile
@@ -26,12 +26,16 @@ ifeq ($(UNAME_S),Darwin)
 	endif
 endif
 
+ifneq ($(CC), gcc)
+	CC=gcc
+endif
+
 #
 # Compile flags
 #
 
-CFLAGS   = -I.              -O3 -DNDEBUG -std=c11   -fPIC
-CXXFLAGS = -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC
+CFLAGS   = -I.              -O3 -DNDEBUG -std=c11   -fPIC -D_POSIX_C_SOURCE=199309L
+CXXFLAGS = -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC -D_POSIX_C_SOURCE=199309L
 LDFLAGS  =
 
 # OS specific