when I install.packages("RGtk2") in R this I get this problem:
fatal error: 'gdk/gdkx.h' file not found
#include <gdk/gdkx.h>
^
1 error generated.
make: *** [Rgtk.o] Error 1
ERROR: compilation failed for package ‘RGtk2’
* removing ‘/usr/local/lib/R/3.4/site-library/RGtk2’
* restoring previous ‘/usr/local/lib/R/3.4/site-library/RGtk2’
I install GTK using brew in macOS Sierra 10.12.3
According to the INSTALL documentation, you have to have Gtk libraries installed first:
In all cases (i.e. Unix or Windows, source or binary), you will need to have the appropriate Gtk libraries.
For Windows, you can download the GTK Developer's Pack from http://gladewin32.sourceforge.net/
For Unix, you can fetch the source files for the different libraries from ftp://ftp.gtk.org/pub/gtk/v2.8/
GTK makes extensive use of other libraries and particular versions of these dependant libraries. As a result, installing GTK (under Unix) can be a time consuming and apparently indirect process that involves installing numerous sub-libraries.
I suspect HomeBrew's Gtk might not be installed on your system properly.
Further research reveals similar problems, as well as suggested troubleshooting to get Gtk and RGtk2 to work together.
The installation of RGtk2 can be much easier now. First install Homebrew, then in R:
system('brew install gtk+')
install.packages(
'RGtk2', type = 'mac.binary.el-capitan', repos = 'https://macos.rbind.org'
)
If you do not prefer using the repository https://macos.rbind.org (which was created by me) to install the pre-built binary package, you may just install RGtk2 from source:
system('brew install gtk+')
install.packages('RGtk2', type = 'source')
In case anyone is curious about the technical details, the error "'gdk/gdkx.h' file not found" has been fixed in this commit in the RGtk2 repo on Github.
