-AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_srcdir)/liblttng-ust -I$(top_srcdir)/tests/utils
+AM_CPPFLAGS += -I$(top_srcdir)/include -I$(top_srcdir)/liblttng-ust -I$(top_srcdir)/tests/utils
noinst_PROGRAMS = test_pthread_name
test_pthread_name_SOURCES = pthread_name.c