From 60efcc2c9cc97ba3352cad0afd5de06b8b1fec38 Mon Sep 17 00:00:00 2001
From: xHire <xhire@wrapsix.org>
Date: Sat, 28 Oct 2017 08:45:51 +0200
Subject: [PATCH] Compiling as C89

---
 configure.ac      | 4 ++--
 src/config.c      | 2 ++
 src/transmitter.c | 2 ++
 src/wrapper.c     | 2 ++
 4 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index c2db1a3..fb8b7cd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,10 +26,10 @@ AC_ARG_ENABLE([debug],
 	      [debug=no])
 
 if test "x$debug" = "xyes"; then
-	AS_COMPILER_FLAGS(AM_CFLAGS, "-g -ggdb -O0 -pipe -pedantic -Wall -Wextra -Waggregate-return -Wcast-align -Wdeclaration-after-statement -Wformat-nonliteral -Wformat-security -Winit-self -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-include-dirs -Wmissing-noreturn -Wmissing-prototypes -Wnested-externs -Wno-missing-field-initializers -Wno-unused-parameter -Wold-style-definition -Wpointer-arith -Wredundant-decls -Wshadow -Wstrict-prototypes -Wswitch-enum -Wundef -Wunsafe-loop-optimizations -Wwrite-strings")
+	AS_COMPILER_FLAGS(AM_CFLAGS, "-std=c89 -g -ggdb -O0 -pipe -pedantic -Wall -Wextra -Waggregate-return -Wcast-align -Wdeclaration-after-statement -Wformat-nonliteral -Wformat-security -Winit-self -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-include-dirs -Wmissing-noreturn -Wmissing-prototypes -Wnested-externs -Wno-missing-field-initializers -Wno-unused-parameter -Wold-style-definition -Wpointer-arith -Wredundant-decls -Wshadow -Wstrict-prototypes -Wswitch-enum -Wundef -Wunsafe-loop-optimizations -Wwrite-strings")
 	AC_DEFINE([DEBUG], [], [Turn on debug mode])
 else
-        AS_COMPILER_FLAGS(AM_CFLAGS, "-O2")
+        AS_COMPILER_FLAGS(AM_CFLAGS, "-O2 -pipe")
 fi
 
 
diff --git a/src/config.c b/src/config.c
index cb786ce..195fa37 100644
--- a/src/config.c
+++ b/src/config.c
@@ -16,6 +16,8 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define _POSIX_C_SOURCE 201112L
+
 #include <arpa/inet.h>	/* inet_pton */
 #include <ifaddrs.h>	/* struct ifaddrs, getifaddrs, freeifaddrs */
 #include <netdb.h>	/* getnameinfo, NI_NUMERICHOST */
diff --git a/src/transmitter.c b/src/transmitter.c
index d97b5f5..3e9295a 100644
--- a/src/transmitter.c
+++ b/src/transmitter.c
@@ -16,6 +16,8 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define _DEFAULT_SOURCE
+
 #include <net/if.h>		/* struct ifreq */
 #include <netinet/if_ether.h>	/* {P,A}F_PACKET, ETH_P_*, socket, SOCK_RAW,
 				 * setsockopt, SOL_SOCKET, SO_BINDTODEVICE,
diff --git a/src/wrapper.c b/src/wrapper.c
index 754db71..bc8bb32 100644
--- a/src/wrapper.c
+++ b/src/wrapper.c
@@ -16,6 +16,8 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define _DEFAULT_SOURCE
+
 #include <arpa/inet.h>		/* inet_pton */
 #include <linux/ethtool.h>	/* struct ethtool_value */
 #include <linux/if_ether.h>	/* ETH_P_ALL */