Merge PR #396 (Add GCHP_WRAPPER cpp definition)

This merge brings PR #396 (Add GCHP_WRAPPER cpp definition, by @lizziel)
into the GEOS-Chem "no-diff-to-benchmark" development stream.

This fixes an compiliation issue in Cloud-J, which occurred because the
GCHP_WRAPPPER C-preprocessor setting was not defined in CMakeLists.txt.
Thus we need to merge this PR before Cloud-J PR #10 and GCHP PR #394.

Signed-off-by: Bob Yantosca <yantosca@seas.harvard.edu>

CHANGELOG.md

@@ -10,6 +10,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ## [Unreleased] - TBD
 ### Added
 - Now print container name being read by ExtData when `CAP.EXTDATA` is set to `DEBUG` in `logging.yml`
+- Added new pre-processer setting GCHP_WRAPPER for use in submodules
 
 ### Changed
 - Now use short names for submodules (i.e. without the path) in `.gitmodules`

src/GCHP_GridComp/CMakeLists.txt

@@ -4,6 +4,7 @@
 # Set cmake logicals needed for subprojects
 #---------------
 set(FV_PRECISION           R8    ) # FV3 precision is R8
+set(GCHP_WRAPPER           TRUE  ) # GCHP model configuration
 set(CLOUDJ_EXTERNAL_CONFIG TRUE  ) # Not Cloud-J standalone
 set(HEMCO_EXTERNAL_CONFIG  TRUE  ) # Not HEMCO standalone
 set(GC_EXTERNAL_CONFIG     TRUE  ) # Not GEOS-Chem Classic