From 3376a6daf85691d6bccf26f16f685ddb17902ccd Mon Sep 17 00:00:00 2001
From: Pavel Roskin <plroskin@gmail.com>
Date: Sun, 1 Jan 2017 00:54:19 -0800
Subject: [PATCH] Exit with error message if pkg-config is not found

PKG_PROG_PKG_CONFIG does not exit if it fails to find pkg-config.

Continuing without pkg-config leads to misleading error messages when
checks for packages fail.
---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index 338ba9e0..bbca2c7a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -8,7 +8,11 @@ AC_CONFIG_MACRO_DIR([m4])
 AC_PROG_CC
 AC_C_CONST
 AC_PROG_LIBTOOL
+
 PKG_PROG_PKG_CONFIG
+if test "x$PKG_CONFIG" = "x"; then
+  AC_MSG_ERROR([please install pkg-config])
+fi
 
 AC_CONFIG_SUBDIRS([libpainter librfxcodec])