[PATCH] gnu: r: Add pango to inputs.

[Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>]

Hi Guix,

our R package is currently built with Cairo, which allows R to use the Cairo
rendering backend.  When R starts up and loads grDevices, however, it checks
for the availability of Pango, not Cairo.  So even though the Cairo backend
works just fine, R falls back to using the primitive Xlib backend.

You can confirm this by running this in R:

    getOption('bitmapType')
    options(bitmapType='cairo')

The first command should show you "Xlib" with R from Guix.  The second sets
the backend to Cairo, which works without problems.

I decided against patching the detection mechanism in R because I don't know
if R might use Pango features elsewhere.  Instead I opted to add Pango to the
inputs.  Pango pulls in Cairo, so the package closure is a little bigger than
before.  Pango makes up 0.7% of the total size, so I think that's okay.

~~ Ricardo

Ricardo Wurmus (1):
  gnu: r: Add pango to inputs.

 gnu/packages/statistics.scm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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2.8.4