From b6681480afd85ed3914902a96b4d7bc4185e3391 Mon Sep 17 00:00:00 2001
From: Nick Bowler <nbowler@draconx.ca>
Date: Wed, 3 Feb 2010 14:40:20 -0500
Subject: [PATCH] build: Abort configure if specified module library is not
 found.

If the user specifies, say, --with-modlib=modplug, it is not right to
use any other module library.  We also avoid checking for unrequested
module libraries.
---
 configure.ac | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/configure.ac b/configure.ac
index 8844115..6dfc336 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,23 +33,16 @@ AC_ARG_WITH([modlib],
 	[with_modlib=$withval],
 	[with_modlib=auto])
 
-CHECK_LIBMODPLUG([have_libmodplug=yes], [have_libmodplug=no])
-AC_MSG_CHECKING([which module library to use])
 case $with_modlib in
-none)
-	use_modlib=none
-;;
-no)
+no|none)
 	use_modlib=none
 ;;
 modplug)
-	if test x$have_libmodplug = xyes; then
-		use_modlib=modplug
-	else
-		use_modlib=none
-	fi
+	CHECK_LIBMODPLUG([use_modlib=modplug], [])
 ;;
 auto)
+	CHECK_LIBMODPLUG([have_libmodplug=yes], [have_libmodplug=no])
+
 	if test x$have_libmodplug = xyes; then
 		use_modlib=modplug
 	else
@@ -60,6 +53,7 @@ auto)
 	AC_MSG_ERROR([Invalid argument to --with-modlib: $with_modlib])
 ;;
 esac
+AC_MSG_CHECKING([which module library to use])
 AC_MSG_RESULT([$use_modlib])
 
 AM_CONDITIONAL([USE_LIBMODPLUG], [test x$use_modlib = xmodplug])
-- 
2.43.0