New unlisted system dependency udunits2

[dhvalden]

While installing INLA:

  Configuration failed because libudunits2.so was not found. Try installing:
    * deb: libudunits2-dev (Debian, Ubuntu, ...)
    * rpm: udunits2-devel (Fedora, EPEL, ...)
    * brew: udunits (OSX)

While is a ependency of INLA, it carries to abn since INLA is a dependency of abn.

[abhishektiwari]

+1, Getting this error on Mac/Ubuntu

Error: Error installing package 'units':
=================================

* installing *source* package ‘units’ ...
** package ‘units’ successfully unpacked and MD5 sums checked
** using staged installation
configure: units: 0.8-5
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 clang++ -std=gnu++17 accepts -g... yes
checking for clang++ -std=gnu++17 option to enable C++11 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 _Bool... no
checking for stdbool.h that conforms to C99... yes
checking for error_at_line... no
checking for gcc... clang
checking whether the compiler supports GNU C... yes
checking whether clang accepts -g... yes
checking for clang option to enable C11 features... none needed
checking for XML_ParserCreate in -lexpat... yes
checking for udunits2.h... no
checking for udunits2/udunits2.h... no
checking for ut_read_xml in -ludunits2... no
configure: error: in `/private/var/folders/jc/7dkljn7n3hb2w2jsw27d0ghh0000gn/T/RtmpKCSXbm/R.INSTALL148a21dfc0/units':
configure: error: 
--------------------------------------------------------------------------------
  Configuration failed because libudunits2.so was not found. Try installing:
    * deb: libudunits2-dev (Debian, Ubuntu, ...)
    * rpm: udunits2-devel (Fedora, EPEL, ...)
    * brew: udunits (OSX)
  If udunits2 is already installed in a non-standard location, use:
    --configure-args='--with-udunits2-lib=/usr/local/lib'
  if the library was not found, and/or:
    --configure-args='--with-udunits2-include=/usr/include/udunits2'
  if the header was not found, replacing paths with appropriate values.
  You can alternatively set UDUNITS2_INCLUDE and UDUNITS2_LIBS manually.
--------------------------------------------------------------------------------

See `config.log' for more details
ERROR: configuration failed for package ‘units’
* removing ‘/Users/abhishektiwari/Labs/joss/Abn/renv/staging/1/units’
install of package 'units' failed [error code 1]

[j-i-l]

Indeed, both on Fedora and on Ubuntu udunits2 is reported missing when trying to install INLA and it turns out udunits2 is not even be the only package INLA misses.

I've added the list of INLA dependencies on Fedora and Ubuntu in #124 (comment) and we also carried out the installation procedure for INLA on a MacOS and on a Windows server and documented the required steps in the Prior to installing section.

IMHO, installing INLA is a bit tedious. Unfortunately we cannot easily drop INLA as a dependency at the moment.