From 60778578f8fed4fcf4fa511ca3b9c2f43e5018da Mon Sep 17 00:00:00 2001
From: Alexey Kopytov <akopytov@gmail.com>
Date: Mon, 16 Jan 2017 08:41:48 +0300
Subject: [PATCH] Fixes #101: Obscure ./configure error when pkg-config is not
 installed

Produce a more meaningful error message at autoconf time when pkg-config
is not installed on the host system.
---
 configure.ac | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/configure.ac b/configure.ac
index 1fbf2c3..02ea93f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,6 +19,9 @@ AC_CONFIG_SRCDIR([sysbench/sysbench.c])
 AC_CONFIG_HEADER([config/config.h])
 AC_CONFIG_MACRO_DIR([m4])
 
+m4_pattern_forbid([^PKG_[A-Z_]+$],
+        [pkg-config has to be installed to build sysbench])
+
 ACX_USE_SYSTEM_EXTENSIONS
 
 AC_PROG_CC