* installing to library ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages’
* installing *source* package ‘vol2birdR’ ...
** this is package ‘vol2birdR’ version ‘1.3.1’
** package ‘vol2birdR’ successfully unpacked and MD5 sums checked
** using staged installation
checking for a sed that does not truncate output... /usr/bin/sed
checking for gawk... gawk
checking for grep that handles long lines and -e... /usr/bin/grep
checking for gcc... gcc-16
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether the compiler supports GNU C... yes
checking whether gcc-16 accepts -g... yes
checking for gcc-16 option to enable C11 features... none needed
checking for stdio.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for strings.h... yes
checking for sys/stat.h... yes
checking for sys/types.h... yes
checking for unistd.h... yes
checking for h5cc... /usr/bin/h5cc
checking for HDF5 libraries... yes (version 2.1.0)
checking for hdf5.h... yes
checking for H5Fcreate in -lhdf5... no
checking for hdf5_hl.h... yes
checking for H5LTpath_valid in -lhdf5_hl... no
checking for main in -lhdf5_hl... no
checking for matching HDF5 Fortran wrapper... /usr/bin/h5fc
Found hdf5 with version: 2.1.0
checking for pkg-config... yes
checking for proj CFLAGS... -I/usr/include/x86_64-linux-gnu -I/usr/include/webp -isystem /usr/include/mit-krb5 -isystem /usr/include/mit-krb5
checking for proj LDFLAGS... 
checking for proj LIBS... -lproj
checking for proj.h... yes
checking for proj_trans in -lproj... no
configure: Could not identify PROJ.6
configure: Trying to identify PROJ.4
checking for projects.h... no
checking If PROJ could be identified... No
configure: error: Proj not found in standard search locations. Install proj.4/proj.6 library
ERROR: configuration failed for package ‘vol2birdR’
* removing ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/vol2birdR’