[Rd] More Capability for Capabilities

[Paul Grosu]

Hi Dario,

Here are another couple of other fun functions you can utilize besides the
ones Dirk recommended :)

extSoftVersion()
grSoftVersion()

Below is an example:

> grSoftVersion()
     cairo                   libpng                     jpeg
  "1.10.2"                 "1.6.16"                    "9.1"
                 libtiff
"LIBTIFF, Version 4.0.3"

> extSoftVersion()
      zlib                  bzlib             xz
   "1.2.8"   "1.0.6, 6-Sept-2010"        "5.0.8"
      PCRE                    ICU            TRE
"8.36 2014-09-26"          "53.1" "TRE 0.8.0 R_fixes (BSD)"
     iconv
"win_iconv"

Hope it helps,
~p

On Thu, Jan 28, 2016 at 6:32 AM, Dirk Eddelbuettel <edd at debian.org> wrote:

>
> On 28 January 2016 at 09:00, Dario Strbenac wrote:
> | The capabilities function gives a logical result of which features R has
> been compiled with. Is there a more advanced variety of the function that
> will give the version number of the library, or its system path, rather
> than simply TRUE ?
>
> Both can _change_ when dynamic linking is involved [1].  So I'd say that
> is a job
> for your operating system.
>
> Eg on mine and taking png:
>
>   edd at max:~$ r -e 'print(capabilities()[["png"]])'
>   [1] TRUE
>   edd at max:~$ ldd /usr/lib/R/modules/R_X11.so | grep png
>           libpng12.so.0 => /lib/x86_64-linux-gnu/libpng12.so.0
> (0x00007f150324d000)
>   edd at max:~$ dpkg -S /lib/x86_64-linux-gnu/libpng12.so.0
>   libpng12-0:amd64: /lib/x86_64-linux-gnu/libpng12.so.0
>   edd at max:~$
>
> Dirk
>
> [1] Presumably only minor numbers change while the ABI remains the same.
>
> --
> http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org
>
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