From dd9f8b8cc6d873517dedd83935ed0d994bbbd6c9 Mon Sep 17 00:00:00 2001
From: Emilio Pozuelo Monfort <pochu27@gmail.com>
Date: Tue, 28 Sep 2010 11:53:03 +0200
Subject: [PATCH] Don't enable dtrace support when dtrace isn't available

Fixes FTBFS when dtrace isn't available but <sys/sdt.h> is.
---
 configure.ac | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index c6fc9a1dd..51591d8a8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2787,11 +2787,12 @@ if test "x$enable_dtrace" != xno; then
       if test "x$enable_dtrace" = xyes; then
         AC_MSG_ERROR([dtrace not found])
       fi
+    else
+      AC_CHECK_HEADER([sys/sdt.h],have_dtrace=yes,
+                      [if test "x$enable_dtrace" = xyes; then
+                        AC_MSG_ERROR([dtrace support needs sys/sdt.h header])
+                       fi])
     fi
-    AC_CHECK_HEADER([sys/sdt.h],have_dtrace=yes,
-                    [if test "x$enable_dtrace" = xyes; then
-                      AC_MSG_ERROR([dtrace support needs sys/sdt.h header])
-                     fi])
   fi
 else
   AC_MSG_RESULT([no])