Found the following significant warnings:
  simulations_1.5.cpp:320:18: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  simulations_1.5.cpp:416:18: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  simulations_1.5.cpp:524:18: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
See '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/FORTLS.Rcheck/00install.out' for details.
checkRd: (7) file 'tree.detection.Rd': \item in \arguments must have non-empty label
checkRd: (7) file 'tree.detection.Rd': \item in \arguments must have non-empty label
Found the following significant warnings:
  simulations_1.5.cpp:320:18: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  simulations_1.5.cpp:416:18: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  simulations_1.5.cpp:524:18: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
See ‘/data/gannet/ripley/R/packages/tests-clang/FORTLS.Rcheck/00install.out’ for details.
installed size is  7.6Mb
  sub-directories of 1Mb or more:
    data   1.0Mb
    libs   6.0Mb
checkRd: (7) file 'tree.detection.Rd': \item in \arguments must have non-empty label
checkRd: (7) file 'tree.detection.Rd': \item in \arguments must have non-empty label
installed size is 10.0Mb
  sub-directories of 1Mb or more:
    data   1.0Mb
    libs   8.3Mb
installed size is  9.1Mb
  sub-directories of 1Mb or more:
    data   1.0Mb
    libs   7.5Mb
installed size is  9.1Mb
  sub-directories of 1Mb or more:
    data   1.0Mb
    libs   7.5Mb

Check process probably crashed or hung up for 20 minutes ... killed
Most likely this happened in the example checks (?),
if not, ignore the following last lines of example output:
Path to PROJ shared files: D:/RCompile/CRANpkg/lib/4.2/rgdal/proj
PROJ CDN enabled: FALSE
Linking to sp version:1.4-6
To mute warnings of possible GDAL/OSR exportToProj4() degradation,
use options("rgdal_show_exportToProj4_warnings"="none") before loading sp or rgdal.
[1] FALSE
> 
> 
> 
> cleanEx()

detaching 'package:rgdal', 'package:raster', 'package:sp'

> nameEx("mosaic_rasters")
> ### * mosaic_rasters
> 
> flush(stderr()); flush(stdout())
> 
> ### Name: mosaic_rasters
> ### Title: Mosaic raster files using GDAL Utilities
> ### Aliases: mosaic_rasters
> 
> ### ** Examples
> 
> # We'll pre-check to make sure there is a valid GDAL install
> # and that raster and rgdal are also installed.
> # Note this isn't strictly neccessary, as executing the function will
> # force a search for a valid GDAL install.
> outdir <- tempdir()
> gdal_setInstallation()
======== End of example output (where/before crash/hang up occured ?) ========