This package is used to improve the performance of the adjoint model in the Weather Research and Forecasting plus (WRFPLUS). There are five files as following:

dyn_em
frame
main
phys
share

Step 1: Download the underlying version

Users can download the WRFPLUS source code from http://www2.mmm.ucar.edu/wrf/users/wrfda/download/wrfplus.html , then Unzip and untar the WRFPLUS file.

Step 2: Download the optimazatiom code

User can download the optimaztion code from this web :

https://github.com/juanjliu/WRFDA-OPTIMAZATION.git

Step 3: Unzip and untar the WRFDA-OPTIMAZATION file

 cd WRFPLUSV3   (from Step 1)
 Updating optimation codes in the five files of the underlying version 

Step 4: Installing WRFPLUS for 4D-Var Run

 cd WRFPLUSV3
 ./configure wrfplus
 ./compile em_real >& compile.out

More detail Installing information, User can see users_guide_Chap6 from

http://www2.mmm.ucar.edu/wrf/users/wrfda/Docs/user_guide_V3.7/users_guide_chap6.htm#_Installing_WRFDA_for