Mesa (master): dri: Add a useful error message if someone' s packages missed libudev deps.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: c849ecc19a4cb2951a8b9e8d257632f492ab2517
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=c849ecc19a4cb2951a8b9e8d257632f492ab2517

Author: Eric Anholt <eric at anholt.net>
Date:   Thu Jan 30 10:44:58 2014 -0800

dri: Add a useful error message if someone's packages missed libudev deps.

Reviewed-by: Matt Turner <mattst88 at gmail.com>

---

 src/loader/loader.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/loader/loader.c b/src/loader/loader.c
index 5d25899..811f8a2 100644
--- a/src/loader/loader.c
+++ b/src/loader/loader.c
@@ -111,6 +111,11 @@ udev_dlopen_handle(void)
           * might be ia64.
           */
          udev_handle = dlopen("libudev.so.0", RTLD_LOCAL | RTLD_LAZY);
+
+         if (!udev_handle) {
+            log_(_LOADER_FATAL, "Couldn't dlopen libudev.so.1 or libudev.so.0, "
+                 "driver detection may be broken.\n");
+         }
       }
    }