[R-sig-Geo] Problems installing rgdal on ubuntu 18.04 from ubuntu-unstable GDAL: 3.0.2 / PROJ version: 6.2.1

[Tomislav Hengl]

I'm trying to install rgdal using ubuntu-unstable. First I do:

sudo apt-get install libproj-dev libgdal-dev

Then I get 2 different messages depending on the rgdal version:

R CMD INSTALL rgdal_1.4-8.tar.gz
* installing to library ‘/home/tomislav/R/x86_64-pc-linux-gnu-library/3.5’
* installing *source* package ‘rgdal’ ...
** package ‘rgdal’ successfully unpacked and MD5 sums checked
configure: R_HOME: /opt/microsoft/ropen/3.5.1/lib64/R
configure: CC: gcc -std=gnu99
configure: CXX: g++
configure: C++11 support available
configure: rgdal: 1.4-7
checking for /usr/bin/svnversion... yes
configure: svn revision: 845
checking for gdal-config... /usr/bin/gdal-config
checking gdal-config usability... yes
configure: GDAL: 3.0.2
checking GDAL version >= 1.11.4... yes
checking GDAL version <= 2.5 or >= 3.0... yes
checking gdal: linking with --libs only... yes
checking GDAL: gdal-config data directory readable... yes
checking GDAL: /usr/share/gdal/pcs.csv readable... yes
configure: pkg-config proj exists, will use it
configure: PROJ version: 6.2.1
configure: Support for PROJ >= 6.0.0 not yet available, deprecated API 
defined
configure: proj CPP flags: -DACCEPT_USE_OF_DEPRECATED_PROJ_API_H
configure: PROJ LIBS: -lproj
checking PROJ header API:... proj_api.h
checking proj_api.h presence and usability... yes
checking PROJ version agreement... no
configure: error: proj_api.h and pkg-config give different versions
ERROR: configuration failed for package ‘rgdal’
* removing ‘/home/tomislav/R/x86_64-pc-linux-gnu-library/3.5/rgdal’



 > install.packages("rgdal")
Installing package into ‘/home/tomislav/R/x86_64-pc-linux-gnu-library/3.5’
(as ‘lib’ is unspecified)
   % Total    % Received % Xferd  Average Speed   Time    Time     Time 
Current
                                  Dload  Upload   Total   Spent    Left 
Speed
100 1631k  100 1631k    0     0   722k      0  0:00:02  0:00:02 --:--:-- 
  722k
* installing *source* package ‘rgdal’ ...
** package ‘rgdal’ successfully unpacked and MD5 sums checked
checking for g++... g++
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 we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
configure: CC: gcc -std=gnu99
configure: CXX: g++
configure: rgdal: 1.3-3
checking for /usr/bin/svnversion... yes
configure: svn revision: 759
checking whether g++ supports C++11 features by default... yes
configure: C++11 support available
checking for gdal-config... /usr/bin/gdal-config
checking gdal-config usability... yes
configure: GDAL: 3.0.2
checking GDAL version >= 1.11.4... yes
checking gdal: linking with --libs only... yes
checking GDAL: /usr/share/gdal/pcs.csv readable... yes
configure: pkg-config proj exists, will use it
configure: PROJ version: 6.2.1
checking proj_api.h presence and usability... no
configure: error: proj_api.h not found in standard or given locations.
ERROR: configuration failed for package ‘rgdal’
* removing ‘/home/tomislav/R/x86_64-pc-linux-gnu-library/3.5/rgdal’
Warning in install.packages :
   installation of package ‘rgdal’ had non-zero exit status

The downloaded source packages are in
	‘/data/RTMP/RtmpZtTz9T/downloaded_packages’


pkg-config proj --libs
-lproj

 > devtools::session_info()
Session info 
---------------------------------------------------------------------------------------------------
  setting  value
  version  R version 3.5.1 (2018-07-02)
  system   x86_64, linux-gnu
  ui       RStudio (1.2.1335)
  language en_US
  collate  en_US.UTF-8
  tz       Europe/Amsterdam
  date     2020-03-09

Packages 
-------------------------------------------------------------------------------------------------------
  package       * version date       source
  base          * 3.5.1   2018-08-05 local
  compiler        3.5.1   2018-08-05 local
  datasets      * 3.5.1   2018-08-05 local
  devtools        1.13.6  2018-06-27 CRAN (R 3.5.1)
  digest          0.6.18  2018-10-10 CRAN (R 3.5.1)
  graphics      * 3.5.1   2018-08-05 local
  grDevices     * 3.5.1   2018-08-05 local
  grid            3.5.1   2018-08-05 local
  lattice         0.20-35 2017-03-25 CRAN (R 3.5.1)
  memoise         1.1.0   2017-04-21 CRAN (R 3.5.1)
  methods       * 3.5.1   2018-08-05 local
  RevoUtils     * 11.0.1  2018-08-01 local
  RevoUtilsMath * 11.0.0  2018-08-01 local
  sp            * 1.3-1   2018-06-05 CRAN (R 3.5.1)
  stats         * 3.5.1   2018-08-05 local
  tools           3.5.1   2018-08-05 local
  utils         * 3.5.1   2018-08-05 local
  withr           2.1.2   2018-03-15 CRAN (R 3.5.1)


I have tried removing all installations of GDAL, proj and QGIS 2x but no 
luck - always the same problem with "proj_api.h". What are my best 
options? thank you!