Using rworldmap on mac, compilation of dependencies fails during install

[Breanne Kisselstein]

Hi there,

When I try to install the 'rworldmap' package it says compilation fails for dependencies 'map tools' and 'fields.' Is this because I need to install 'rtools' which is a package developed for windows and not mac or for some other reason? I have no issue when installing the 'sp' package or 'rworldxtra' package needed to run this script.

I wanted to plot sampling locations in the Northeastern United States using longitude and latitude and then overlay the state maps, maybe there is another way to do this?

Thank you so much!

Copied and pasted my console for installing the 'rworldmap' package in case that is helpful:

> install.packages("rworldmap")

also installing the dependencies ‘maptools’, ‘fields’

  There are binary versions available but the source versions are later:

         binary source needs_compilation

maptools  0.9-9  1.0-2              TRUE

fields     10.3   11.6              TRUE

Do you want to install from sources the packages which need compilation? (Yes/no/cancel) yes

trying URL 'https://cran.rstudio.com/bin/macosx/el-capitan/contrib/3.5/rworldmap_1.3-6.tgz'

Content type 'application/x-gzip' length 2925754 bytes (2.8 MB)

==================================================

downloaded 2.8 MB

The downloaded binary packages are in

/var/folders/66/ljhnzljd2b9dppr32th5vx_w0000gn/T//RtmpJPgbD8/downloaded_packages

installing the source packages ‘maptools’, ‘fields’

trying URL 'https://cran.rstudio.com/src/contrib/maptools_1.0-2.tar.gz'

Content type 'application/x-gzip' length 1585377 bytes (1.5 MB)

==================================================

downloaded 1.5 MB

trying URL 'https://cran.rstudio.com/src/contrib/fields_11.6.tar.gz'

Content type 'application/x-gzip' length 3279148 bytes (3.1 MB)

==================================================

downloaded 3.1 MB

* installing *source* package ‘maptools’ ...

** package ‘maptools’ successfully unpacked and MD5 sums checked

** libs

xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

ERROR: compilation failed for package ‘maptools’

* removing ‘/Library/Frameworks/R.framework/Versions/3.5/Resources/library/maptools’

Warning in install.packages :

  installation of package ‘maptools’ had non-zero exit status

* installing *source* package ‘fields’ ...

** package ‘fields’ successfully unpacked and MD5 sums checked

** libs

xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

ERROR: compilation failed for package ‘fields’

* removing ‘/Library/Frameworks/R.framework/Versions/3.5/Resources/library/fields’

Warning in install.packages :

  installation of package ‘fields’ had non-zero exit status

The downloaded source packages are in

‘/private/var/folders/66/ljhnzljd2b9dppr32th5vx_w0000gn/T/RtmpJPgbD8/downloaded_packages’