See http://www.astro.princeton.edu/~jhartman/vartools/README_1.38 for
general instructions on how to install VARTOOLS version 1.38,
including for Linux. This file provides step-by-step instructions for
installing on a Mac.

The following procedure has been used to successfully build vartools
on an out-of-the-box Mac running macOS Mojave 10.14.3.  The text on
any line starting with a "$" (i.e., all text excluding the leading $)
should be entered into a terminal. On a Mac that has already been
setup, some of the required software may already be installed, and
those steps can be skipped.

1. Download and install Xcode from the App store:
https://developer.apple.com/xcode

2. Install xcode command-line tools

$ xcode-select --install

3. Install Homebrew: https://brew.sh/

$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

4. Install wget:

$ brew install wget

5. Install gawk:

$ brew install gawk

6. Install CFITSIO:

$ brew install cfitsio

7. Install GSL:

$ brew install gsl

8. Install libtool:

$ brew install libtool

9. Install python:

$ brew install python

10. Install numpy:

$ pip3 install numpy

11. Install R:

$ brew install R

12. Install CSPICE: http://naif.jpl.nasa.gov/naif/toolkit_C.html

Download MacOS version of cspice.tar.Z (the wget command below will
pull the 64bit version, if you have a 32bit processor, you should get
that version instead).

$ mkdir ${HOME}/src
$ cd ${HOME}/src
$ wget http://naif.jpl.nasa.gov/pub/naif/toolkit//C/MacIntel_OSX_AppleC_64bit/packages/cspice.tar.Z

unpack and build via:

$ tar -xzvf cspice.tar.Z
$ cd cspice
$ tcsh makeall.csh
$ mkdir ${HOME}/lib ${HOME}/include
$ cp lib/*.a ${HOME}/lib
$ cp include/*h ${HOME}/include

Install the CSPICE kernel files:

$ mkdir ${HOME}/.cspice
$ cd ${HOME}/.cspice

In Safari, navigate to
ftp://naif.jpl.nasa.gov/pub/naif/generic_kernels/spk/planets/ say yes
to allow the page to open in finder, and login as a guest. Copy the
latest .bsp file (e.g., de435.bsp in April 2019) to ${HOME}/.cspice
e.g., after connecting to the ftp server, the following works for me
in the terminal:

$ cp /Volumes/planets/de435.bsp ${HOME}/.cspice/

In Safari, navigate to
ftp://naif.jpl.nasa.gov/pub/naif/generic_kernels/lsk/ say yes to allow
the page to open in finder, and login as a guest. Copy the latest .tls
file (e.g., naif0012.tls in April 2019) to ${HOME}/.cspice e.g., after
connecting to the ftp server, the following works for me in the
terminal:

$ cp /Volumes/lsk/naif0012.tls ${HOME}/.cspice/

In Safari, navigate to
ftp://naif.jpl.nasa.gov/pub/naif/generic_kernels/pck/ say yes to allow
the page to open in finder, and login as a guest. Copy the latest
pck*.tpc file (e.g., pck00010.tpc in April 2019) to ${HOME}/.cspice
e.g., after connecting to the ftp server, the following works for me
in the terminal:

$ cp /Volumes/pck/pck00010.tpc ${HOME}/.cspice/

Setup environment variables in your .bash_profile:

$ touch ${HOME}/.bash_profile
$ echo export R_HOME=$(R RHOME) >> ${HOME}/.bash_profile
$ echo export CSPICE_EPHEM_FILE=${HOME}/.cspice/de435.bsp >> ${HOME}/.bash_profile
$ echo export CSPICE_LEAPSEC_FILE=${HOME}/.cspice/naif0012.tls >> ${HOME}/.bash_profile
$ echo export CSPICE_PLANETDATA_FILE=${HOME}/.cspice/pck00010.tpc >> ${HOME}/.bash_profile

You would update de435.bsp, naif0012.tls and pck00010.tpc as needed.

$ source ${HOME}/.bash_profile

13. Download, configure, and build vartools (assuming above has been followed for installing libraries):

$ cd ${HOME}/src
$ wget http://www.astro.princeton.edu/~jhartman/vartools/vartools-1.38.tar.gz
$ tar -xzvf vartools-1.38.tar.gz
$ cd vartools-1.38
$ ./configure --prefix=${HOME}/ \
      --with-cspice-lib=${HOME}/lib/cspice.a \
      --with-cspice-include=${HOME}/include \
      --with-RHOME=${R_HOME} \
      F77=gfortran FC=gfortran
$ make
$ make install

The vartools binary will now be installed in ${HOME}/bin

14. Test vartools:

$ ${HOME}/bin/vartools -i EXAMPLES/2 -oneline -LS 0.1 10. 0.1 5 1 EXAMPLES/OUTDIR1 whiten clip 5. 1