-Denable_jedule=ON -Denable_mallocators=ON -Denable_debug=${builddebug} \
-Denable_smpi=${buildsmpi} -Denable_smpi_MPICH3_testsuite=${buildsmpi} -Denable_model-checking=${buildmc} \
-Denable_memcheck=OFF -Denable_memcheck_xml=OFF -Denable_smpi_ISP_testsuite=OFF \
- -Denable_ns3=$(onoff test "$buildmc" != "ON") -Denable_coverage=OFF $WORKSPACE
+ -Denable_ns3=$(onoff test "$buildmc" != "ON") -Denable_coverage=OFF -DLTO_EXTRA_FLAG="auto" $WORKSPACE
make -j$NUMPROC tests
make clean