Change default clang version to clang3.9 in cross build

If we use clang3.9 version in cross build, we can use -O3 option for optimizing.
Relates PR: #15643

1 files changed, 4 insertions, 1 deletions

diff --git a/cross/build-rootfs.sh b/cross/build-rootfs.sh
index f1000222d1..03cd559de5 100755
--- a/cross/build-rootfs.sh
+++ b/cross/build-rootfs.sh
@@ -5,7 +5,7 @@ usage()
     echo "Usage: $0 [BuildArch] [LinuxCodeName] [--skipunmount]"
     echo "BuildArch can be: arm(default), armel, arm64, x86"
     echo "LinuxCodeName - optional, Code name for Linux, can be: trusty(default), vivid, wily, xenial. If BuildArch is armel, LinuxCodeName is jessie(default) or tizen."
-    echo "lldbx.y - optional, LLDB version, can be: lldb3.6(default), lldb3.8, no-lldb"
+    echo "lldbx.y - optional, LLDB version, can be: lldb3.6(default), lldb3.8, lldb3.9, no-lldb"
     echo "--skipunmount - optional, will skip the unmount of rootfs folder."
     exit 1
 }
@@ -70,6 +70,9 @@ for i in "$@" ; do
         lldb3.8)
             __LLDB_Package="lldb-3.8-dev"
             ;;
+        lldb3.9)
+            __LLDB_Package="lldb-3.9-dev"
+            ;;
         no-lldb)
             unset __LLDB_Package
             ;;