From d5fcd4f7a3b20bdd3646acecb59d32ab8e94f64d Mon Sep 17 00:00:00 2001
From: Pritesh Kothari <Pritesh.Kothari@Sun.COM>
Date: Fri, 30 Oct 2009 14:44:50 +0100
Subject: [PATCH] Fix configure detection of device mapper

* configure.in: the PKG_CHECK_MODULES() for it would not work on
  Ubuntu and SuSE, so add a direct check fallback
---
 configure.in | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/configure.in b/configure.in
index 2f9db72ce9..04f6dfe155 100644
--- a/configure.in
+++ b/configure.in
@@ -1304,11 +1304,22 @@ if test "$with_storage_mpath" = "yes"; then
    DEVMAPPER_REQUIRED=0.0
    DEVMAPPER_CFLAGS=
    DEVMAPPER_LIBS=
-   PKG_CHECK_MODULES(DEVMAPPER, devmapper >= $DEVMAPPER_REQUIRED,
-    [], [
-    AC_MSG_ERROR(
-    [You must install device-mapper-devel >= $DEVMAPPER_REQUIRED to compile libvirt])
-    ])
+   PKG_CHECK_MODULES([DEVMAPPER], [devmapper >= $DEVMAPPER_REQUIRED], [], [DEVMAPPER_FOUND=no])
+   if test "$DEVMAPPER_FOUND" = "no"; then
+     # devmapper is missing pkg-config files in ubuntu, suse, etc
+     save_LIBS="$LIBS"
+     save_CFLAGS="$CFLAGS"
+     DEVMAPPER_FOUND=yes
+     AC_CHECK_HEADER([libdevmapper.h],,[DEVMAPPER_FOUND=no])
+     AC_CHECK_LIB([devmapper], [dm_task_run],,[DEVMAPPER_FOUND=no])
+     DEVMAPPER_LIBS="-ldevmapper"
+     LIBS="$save_LIBS"
+     CFLAGS="$save_CFLAGS"
+   fi
+   if test "$DEVMAPPER_FOUND" = "no" ; then
+     AC_MSG_ERROR([You must install device-mapper-devel/libdevmapper >= $DEVMAPPER_REQUIRED to compile libvirt])
+   fi
+
 fi
 AC_SUBST([DEVMAPPER_CFLAGS])
 AC_SUBST([DEVMAPPER_LIBS])
-- 
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