cran-comments.md

## Test environments

* Linux: Ubuntu 18.04.4LTS  (local)
  - R 3.4.4 (production)
  - R devel 2020-07-28 r78930 (test)
  - R patched 4.0.2 r78930 (test)
* Windows 7 Enterprise (test)
  - R 3.5.1 (test)
* MacOS (test)
  - 

## R CMD check results

0 errors | 0 warnings | 0 notes


## This is a resubmission

```
Dear maintainer,

Please see the problems shown on
<https://cran.r-project.org/web/checks/check_results_gmGeostats.html>.

Please correct before 2020-10-03 to safely retain your package on CRAN.

The CRAN Team
```

... the sympthom being an error while #include <omp.h> in r-release-macos-x86_64, we identified the problem as a lack of appropriate linkage of OpenMP. 

Solution: 
1.- the header inclusion and all usages of #pragma directives were enclosed in conditional structures
#ifdef _OPENMP 
 ...
#endif 

2. `$(SHLIB_OPENMP_CFLAGS)` was added to PKG_CFLAGS and PKG_LIBS fields in Makevars files

3.- as mentioned in `Test environments`, the new code was tested under MacOS as well.