[Xen-changelog] [qemu-xen master] configure: fix LTTng UST tracing backend detection

[patchbot@xxxxxxx]

commit c79ed23df5090294a81fd66f67632e4535fb3164
Author:     Francis Deslauriers <francis.deslauriers@xxxxxxxxxxxx>
AuthorDate: Mon Nov 28 10:52:17 2016 -0500
Commit:     Stefan Hajnoczi <stefanha@xxxxxxxxxx>
CommitDate: Tue Nov 29 09:36:12 2016 +0000

    configure: fix LTTng UST tracing backend detection
    
    The detection program needs to be linked with -ldl to build succesfully
    with recent versions of LTTng-UST.
    
    We also need to add -ldl to the libs required to build the LTTng-UST
    backend (lttng_ust_libs).
    
    Signed-off-by: Francis Deslauriers <francis.deslauriers@xxxxxxxxxxxx>
    Message-id: 
1480348337-24271-1-git-send-email-francis.deslauriers@xxxxxxxxxxxx
    Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
---
 configure | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 5e66828..89df5c4 100755
--- a/configure
+++ b/configure
@@ -4305,11 +4305,11 @@ if have_backend "ust"; then
 #include <lttng/tracepoint.h>
 int main(void) { return 0; }
 EOF
-  if compile_prog "" "" ; then
+  if compile_prog "" "-Wl,--no-as-needed -ldl" ; then
     if $pkg_config lttng-ust --exists; then
       lttng_ust_libs=$($pkg_config --libs lttng-ust)
     else
-      lttng_ust_libs="-llttng-ust"
+      lttng_ust_libs="-llttng-ust -ldl"
     fi
     if $pkg_config liburcu-bp --exists; then
       urcu_bp_libs=$($pkg_config --libs liburcu-bp)
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#master

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