lttng: Preload liblttng-ust-fork.so in TESTS_ENVIRONMENT

This adds LD_PRELOAD=liblttng-ust-fork.so to TESTS_ENVIRONMENT.
This prevents lttng from complaining when processes are forked.
The complaints otherwise taint the output and cause tests to fail.

Signed-off-by: Adam Crume <adamcrume@gmail.com>

diff --git a/src/Makefile.am b/src/Makefile.am
index c11c07344a572e694b8223a9dc16f712edfc7b19..41243a2fa40456bfa9caf25cde633e51cffe2fbb 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -269,6 +269,12 @@ TESTS = \
 check-local:
        $(srcdir)/test/encoding/readable.sh ../ceph-object-corpus
 
+if WITH_LTTNG
+# TODO: If we're running the parallel test harness (the preferred harness), this should be AM_TESTS_ENVIRONMENT instead.
+# See: https://www.gnu.org/software/automake/manual/html_node/Scripts_002dbased-Testsuites.html
+# I don't see the serial-tests Automake option anywhere, but my AM_TESTS_ENVIRONMENT was being ignored.
+TESTS_ENVIRONMENT = LD_PRELOAD=liblttng-ust-fork.so; export LD_PRELOAD; echo "LD_PRELOAD=$${LD_PRELOAD}";
+endif
 
 # base targets