From 41b00707e20f0c07e0dce055884c773de4b82612 Mon Sep 17 00:00:00 2001
From: Dan Nicholson <dbn.lists@gmail.com>
Date: Wed, 12 Dec 2007 08:48:30 -0800
Subject: [PATCH] autoconf: More informative errors when pkg-config macros
 undefined

Added a check that PKG_PROG_PKG_CONFIG is defined before calling it so
the user can see a proper error. Without it, the generated configure
script will just pass on to the next statement and bomb with a strange
shell syntax error.
---
 configure.ac | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/configure.ac b/configure.ac
index 4cd641b136b..40c39b99122 100644
--- a/configure.ac
+++ b/configure.ac
@@ -28,6 +28,12 @@ AC_PROG_CXX
 AC_PATH_PROG(MAKE, make)
 AC_PATH_PROG(MKDEP, makedepend)
 AC_PATH_PROG(SED, sed)
+
+dnl Make sure the pkg-config macros are defined
+m4_ifdef([PKG_PROG_PKG_CONFIG],,[
+    AC_MSG_ERROR([The pkg-config autoconf macros are not defined.
+                  Did you run 'make configure'?])]
+)
 PKG_PROG_PKG_CONFIG()
 
 dnl LIB_DIR - library basename
-- 
2.30.2