--- /dev/null
+From bc1d8ca01415710d40224de312c7ecf6f4223301 Mon Sep 17 00:00:00 2001
+From: Philippe Proulx <eeppeliteloop@gmail.com>
+Date: Mon, 6 Nov 2017 18:46:41 -0500
+Subject: [PATCH] Fix: detect dlmopen() and disable corresponding tests if not
+ available
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+musl and uClibc-ng are known not to support dlmopen(). LTTng-UST has
+this dlmopen() detection.
+
+Signed-off-by: Philippe Proulx <eeppeliteloop@gmail.com>
+[Philippe: backport from upstream commit bc1d8ca0
+ edited to remove .gitignore part]
+Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
+---
+ .gitignore | 1 +
+ configure.ac | 25 ++++++++++++++++++++++
+ tests/regression/ust/ust-dl/prog.c | 17 +++++++++++++--
+ tests/regression/ust/ust-dl/test_ust-dl | 32 ----------------------------
+ tests/regression/ust/ust-dl/test_ust-dl.in | 34 ++++++++++++++++++++++++++++++
+ tests/regression/ust/ust-dl/test_ust-dl.py | 9 +++++++-
+ tests/utils/test_utils.py | 3 +++
+ 7 files changed, 86 insertions(+), 35 deletions(-)
+ delete mode 100755 tests/regression/ust/ust-dl/test_ust-dl
+ create mode 100644 tests/regression/ust/ust-dl/test_ust-dl.in
+
+diff --git a/configure.ac b/configure.ac
+index 016c56ec..b6ea39c5 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -196,6 +196,30 @@ AC_CHECK_FUNCS([ \
+ # add -lrt to LIBS
+ AC_CHECK_LIB([rt], [clock_gettime, timer_create, timer_settime, timer_delete])
+
++# Checks for dl.
++AC_CHECK_LIB([dl], [dlopen], [
++ have_libdl=yes
++ libdl_name=dl
++], [
++ # libdl not found, check for dlopen in libc.
++ AC_CHECK_LIB([c], [dlopen], [
++ have_libc_dl=yes
++ libdl_name=c
++ ], [
++ AC_MSG_ERROR([Cannot find dlopen in libdl nor libc. Use [LDFLAGS]=-Ldir to specify their location.])
++ ])
++])
++
++# Check if libdl has dlmopen support.
++AH_TEMPLATE([HAVE_DLMOPEN], ["Define to 1 if dlmopen is available."])
++AC_CHECK_LIB([$libdl_name], [dlmopen], [
++ AC_DEFINE([HAVE_DLMOPEN], [1])
++ HAVE_DLMOPEN=1
++], [
++ HAVE_DLMOPEN=0
++])
++AC_SUBST(HAVE_DLMOPEN)
++
+ # Babeltrace viewer check
+ AC_ARG_WITH([babeltrace-bin],
+ AS_HELP_STRING([--with-babeltrace-bin],
+@@ -1100,6 +1124,7 @@ AC_CONFIG_FILES([
+ AC_CONFIG_FILES([tests/regression/ust/python-logging/test_python_logging],[chmod +x tests/regression/ust/python-logging/test_python_logging])
+ # Inject LTTNG_TOOLS_BUILD_WITH_LIBPFM variable in test script.
+ AC_CONFIG_FILES([tests/perf/test_perf_raw],[chmod +x tests/perf/test_perf_raw])
++AC_CONFIG_FILES([tests/regression/ust/ust-dl/test_ust-dl],[chmod +x tests/regression/ust/ust-dl/test_ust-dl])
+
+ AC_OUTPUT
+
+diff --git a/tests/regression/ust/ust-dl/prog.c b/tests/regression/ust/ust-dl/prog.c
+index e8e4b264..669792d9 100644
+--- a/tests/regression/ust/ust-dl/prog.c
++++ b/tests/regression/ust/ust-dl/prog.c
+@@ -13,7 +13,12 @@
+ */
+ int main(int argc, char **argv)
+ {
+- void *h0, *h1, *h2, *h3, *h4;
++ void *h0, *h2, *h3, *h4;
++
++#ifdef HAVE_DLMOPEN
++ void *h1;
++#endif
++
+ char *error;
+ int (*foo)(void);
+
+@@ -21,10 +26,14 @@ int main(int argc, char **argv)
+ if (!h0) {
+ goto get_error;
+ }
++
++#ifdef HAVE_DLMOPEN
+ h1 = dlmopen(LM_ID_BASE, "libfoo.so", RTLD_LAZY);
+ if (!h1) {
+ goto get_error;
+ }
++#endif
++
+ h2 = dlopen("libzzz.so", RTLD_LAZY);
+ if (!h2) {
+ goto get_error;
+@@ -38,7 +47,7 @@ int main(int argc, char **argv)
+ goto get_error;
+ }
+
+- foo = dlsym(h1, "foo");
++ foo = dlsym(h3, "foo");
+ error = dlerror();
+ if (error != NULL) {
+ goto error;
+@@ -49,9 +58,13 @@ int main(int argc, char **argv)
+ if (dlclose(h0)) {
+ goto get_error;
+ }
++
++#ifdef HAVE_DLMOPEN
+ if (dlclose(h1)) {
+ goto get_error;
+ }
++#endif
++
+ if (dlclose(h2)) {
+ goto get_error;
+ }
+diff --git a/tests/regression/ust/ust-dl/test_ust-dl b/tests/regression/ust/ust-dl/test_ust-dl
+deleted file mode 100755
+index 1f2934db..00000000
+--- a/tests/regression/ust/ust-dl/test_ust-dl
++++ /dev/null
+@@ -1,32 +0,0 @@
+-#!/bin/bash
+-#
+-# Copyright (C) - 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+-#
+-# This program is free software; you can redistribute it and/or modify it
+-# under the terms of the GNU General Public License, version 2 only, as
+-# published by the Free Software Foundation.
+-#
+-# This program is distributed in the hope that it will be useful, but WITHOUT
+-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+-# more details.
+-#
+-# You should have received a copy of the GNU General Public License along with
+-# this program; if not, write to the Free Software Foundation, Inc., 51
+-# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+-
+-CURDIR=$(dirname $0)
+-TESTDIR=${CURDIR}/../../..
+-
+-source $TESTDIR/utils/utils.sh
+-
+-if [ ! -x "$CURDIR/.libs/libfoo.so" ]; then
+- diag "No shared object generated. Skipping all tests."
+- exit 0
+-fi
+-
+-start_lttng_sessiond_notap
+-
+-python3 ${CURDIR}/test_ust-dl.py
+-
+-stop_lttng_sessiond_notap
+diff --git a/tests/regression/ust/ust-dl/test_ust-dl.in b/tests/regression/ust/ust-dl/test_ust-dl.in
+new file mode 100644
+index 00000000..61d00d21
+--- /dev/null
++++ b/tests/regression/ust/ust-dl/test_ust-dl.in
+@@ -0,0 +1,34 @@
++#!/bin/bash
++#
++# Copyright (C) - 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
++#
++# This program is free software; you can redistribute it and/or modify it
++# under the terms of the GNU General Public License, version 2 only, as
++# published by the Free Software Foundation.
++#
++# This program is distributed in the hope that it will be useful, but WITHOUT
++# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
++# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
++# more details.
++#
++# You should have received a copy of the GNU General Public License along with
++# this program; if not, write to the Free Software Foundation, Inc., 51
++# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
++
++CURDIR=$(dirname $0)
++TESTDIR=${CURDIR}/../../..
++
++source $TESTDIR/utils/utils.sh
++
++if [ ! -x "$CURDIR/.libs/libfoo.so" ]; then
++ diag "No shared object generated. Skipping all tests."
++ exit 0
++fi
++
++export LTTNG_TOOLS_HAVE_DLMOPEN=@HAVE_DLMOPEN@
++
++start_lttng_sessiond_notap
++
++python3 ${CURDIR}/test_ust-dl.py
++
++stop_lttng_sessiond_notap
+diff --git a/tests/regression/ust/ust-dl/test_ust-dl.py b/tests/regression/ust/ust-dl/test_ust-dl.py
+index 81972a7d..72459840 100644
+--- a/tests/regression/ust/ust-dl/test_ust-dl.py
++++ b/tests/regression/ust/ust-dl/test_ust-dl.py
+@@ -31,6 +31,9 @@ sys.path.append(test_utils_path)
+ from test_utils import *
+
+
++have_dlmopen = (os.environ.get('LTTNG_TOOLS_HAVE_DLMOPEN') == '1')
++
++
+ NR_TESTS = 14
+ current_test = 1
+ print("1..{0}".format(NR_TESTS))
+@@ -113,7 +116,11 @@ current_test += 1
+ print_test_result(dlopen_event_found > 0, current_test, "lttng_ust_dl:dlopen event found in resulting trace")
+ current_test += 1
+
+-print_test_result(dlmopen_event_found > 0, current_test, "lttng_ust_dl:dlmopen event found in resulting trace")
++if have_dlmopen:
++ print_test_result(dlmopen_event_found > 0, current_test, "lttng_ust_dl:dlmopen event found in resulting trace")
++else:
++ skip_test(current_test, 'dlmopen() is not available')
++
+ current_test += 1
+
+ print_test_result(build_id_event_found > 0, current_test, "lttng_ust_dl:build_id event found in resulting trace")
+diff --git a/tests/utils/test_utils.py b/tests/utils/test_utils.py
+index 4b38630c..02e632a2 100644
+--- a/tests/utils/test_utils.py
++++ b/tests/utils/test_utils.py
+@@ -62,6 +62,9 @@ def print_test_result(result, number, description):
+ result_string += " {0} - {1}".format(number, description)
+ print(result_string)
+
++def skip_test(number, description):
++ print('ok {} # skip {}'.format(number, description))
++
+ def enable_ust_tracepoint_event(session_info, event_name):
+ event = Event()
+ event.name = event_name
+--
+2.15.0
+
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