Do not overwrite TURBINE_LAUNCHER if the user set it
@@ -23,7 +23,7 @@ export USE_CC=@USE_CC@
export MPI_IMPL=@MPI_IMPL@
export MPI_LIB=@USE_MPI_LIB_DIR@
export MPI_LABEL="@MPI_LABEL@"
-export TURBINE_LAUNCHER=@USE_LAUNCHER@
+export TURBINE_LAUNCHER=${TURBINE_LAUNCHER:-@USE_LAUNCHER@}
export TURBINE_LINE_OUTPUT_FLAG=@MPI_LINE_OUTPUT_FLAG@
export TURBINE_SH=${TURBINE_HOME}/bin/turbine_sh
export TURBINE_MAC=@USE_MAC@
