Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -39,6 +39,9 @@
 set(TEST_SUITE_REMOTE_PORT "" CACHE STRING "Remote execution port")
 mark_as_advanced(TEST_SUITE_REMOTE_USER TEST_SUITE_REMOTE_PORT)
 
+# Run Under configuration for RunSafely.sh (will be set in lit.site.cfg)
+set(TEST_SUITE_RUN_UNDER "" CACHE STRING "RunSafely.sh run-under (-u) parameter")
+
 include(MakefileFunctions)
 include(SingleMultiSource)
 find_package(YACC)
Index: lit.cfg
===================================================================
--- lit.cfg
+++ lit.cfg
@@ -118,6 +118,8 @@
             runsafely_prefix += [ "-rc", config.remote_client ]
         if config.remote_port:
             runsafely_prefix += [ "-rp", config.remote_port ]
+    if config.run_under:
+        runsafely_prefix += [ "-u", config.run_under ]
     timeit = "%s/tools/timeit-target" % config.test_source_root
     timeout = "7200"
     runsafely_prefix += [ "-t", timeit, timeout, stdin, outfile ]
Index: lit.site.cfg.in
===================================================================
--- lit.site.cfg.in
+++ lit.site.cfg.in
@@ -6,5 +6,6 @@
 config.remote_host = "@TEST_SUITE_REMOTE_HOST@"
 config.remote_user = "@TEST_SUITE_REMOTE_USER@"
 config.remote_port = "@TEST_SUITE_REMOTE_PORT@"
+config.run_under = "@TEST_SUITE_RUN_UNDER@"
 
 lit_config.load_config(config, "@CMAKE_SOURCE_DIR@/lit.cfg")