From 9d955556d315c729cbf308de9487ebc938ee91e1 Mon Sep 17 00:00:00 2001
From: Toni Uhlig <matzeton@googlemail.com>
Date: Wed, 20 Dec 2017 23:17:48 +0100
Subject: md readme for travis build status, -std=gnu99 autoconf check

---
 README.md    | 6 ++++++
 configure.ac | 7 +++++++
 2 files changed, 13 insertions(+)
 create mode 100644 README.md

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..9e3aadf
--- /dev/null
+++ b/README.md
@@ -0,0 +1,6 @@
+<img src="https://travis-ci.org/lnslbrty/ptunnel-ng.svg?branch=master">
+
+PingTunnel-[N]ew[G]eneration
+======
+
+see README
diff --git a/configure.ac b/configure.ac
index 54285fc..0b449b1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,6 +26,8 @@ esac
 AM_SILENT_RULES([yes])
 AM_INIT_AUTOMAKE
 AC_PROG_INSTALL
+AC_PROG_CC
+AC_PROG_CC_STDC
 AC_USE_SYSTEM_EXTENSIONS
 AC_C_CONST
 AC_C_INLINE
@@ -34,6 +36,11 @@ AC_CHECK_HEADER_STDBOOL
 AC_FUNC_VPRINTF
 AC_FUNC_MEMCMP
 
+dnl Check for -std=gnu99
+if test x"${ac_cv_prog_cc_stdc}" = x"no"; then
+	AC_MSG_ERROR([Your compiler does not support \`-std=gnu99\`. This is fatal.])
+fi
+
 dnl Check for std includes.
 AC_CHECK_HEADERS([stdarg.h stdio.h unistd.h stdlib.h string.h stdint.h time.h signal.h assert.h],,
     [AC_MSG_ERROR([Missing essential std headers.])])
-- 
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