Treat MPI_PREFLAGS as list instead of string

27 jobs for 24-add-builds-for-gcc-7 in 82 minutes and 7 seconds (queued for 9 seconds)
Status Job ID Name Coverage
  Test
passed #117892
docker
clang_3.4_mpionly_dbg

00:06:22

passed #117893
docker
clang_5.0_hybrid

00:12:48

passed #117896
docker
clang_5.0_hybrid_dbg

00:12:19

passed #117897
docker
clang_5.0_hybrid_dbg_sp

00:08:50

passed #117895
docker
clang_5.0_mpionly_dbg

00:11:38

passed #117894
docker
clang_5.0_serial_dbg

00:11:27

passed #117898
docker
doc

00:01:13

passed #117884
docker
gcc_4.7_hybrid_dbg

00:41:23

passed #117885
cuda docker
gcc_5_hybrid

00:21:54

passed #117886
cuda docker
gcc_5_serial_dbg

00:25:51

passed #117887
docker
gcc_7_hybrid

00:18:09

passed #117890
docker
gcc_7_hybrid_dbg

00:23:25

passed #117891
docker
gcc_7_hybrid_dbg_sp

00:05:56

passed #117889
docker
gcc_7_mpionly_dbg

00:02:51

passed #117888
docker
gcc_7_serial_dbg

00:02:17

passed #117878
docker intel
intel_15_hybrid_dbg

01:07:19

passed #117879
docker intel
intel_17_hybrid

00:43:52

passed #117882
docker intel
intel_17_hybrid_dbg

01:05:48

passed #117883
docker intel
intel_17_hybrid_dbg_sp

01:10:13

passed #117881
docker intel
intel_17_mpionly_dbg

00:32:04

passed #117880
docker intel
intel_17_serial_dbg

01:09:01

passed #117899
win
msvc-12_Hybrid_Dbg

00:42:49

passed #117902
win
msvc-14.1_Hybrid

00:51:21

passed #117900
win
msvc-14.1_Hybrid_Dbg

00:54:20

passed #117901
win
msvc-14.1_Hybrid_SP_Dbg

00:48:57

passed #117904
win
msvc-14.1_MpiOnly_Dbg

00:38:57

passed #117903
win
msvc-14.1_Serial_Dbg

00:41:31