[PATCH] gnu: r: Use uname from Guix

[Roel Janssen]

Dear Guix,

When running R, it executes a wrapper script that relies on
@code{uname} to be available in PATH:

> R_HOME_DIR=/gnu/store/dz83xhn43qc2dpdrja8mhx78l7qffqvq-r-3.3.0/lib/R
> if test "${R_HOME_DIR}" = 
> "/gnu/store/dz83xhn43qc2dpdrja8mhx78l7qffqvq-r-3.3.0/lib/R"; then
>    case "linux-gnu" in
>    linux*)
>      run_arch=`uname -m`
>      case "$run_arch" in
>         x86_64|mips64|ppc64|powerpc64|sparc64|s390x)
>           libnn=lib64

Running R in a pure, ad-hoc environment will therefore signal a warning
that it cannot execute "uname".

With the following patch, it no longer makes this assumption.  Instead
it uses an absolute path to a uname binary from the Guix store.

>From e364cb25204edea4d8bfb9cfc52764f811c58e72 Mon Sep 17 00:00:00 2001
From: Roel Janssen <address@hidden>
Date: Wed, 26 Oct 2016 17:09:19 +0200
Subject: [PATCH] gnu: r: Use uname from Guix

* gnu/packages/statistics.scm (r): Use uname from Guix.
---
 gnu/packages/statistics.scm | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gnu/packages/statistics.scm b/gnu/packages/statistics.scm
index 1b8d074..5e4cd8c 100644
--- a/gnu/packages/statistics.scm
+++ b/gnu/packages/statistics.scm
@@ -118,6 +118,12 @@ be output in text, PostScript, PDF or HTML.")
                             "/lib/R/lib"))
        #:phases
        (modify-phases %standard-phases
+         (add-before 'configure 'patch-uname
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((uname-bin (string-append (assoc-ref inputs "coreutils")
+                                             "/bin/uname")))
+               (substitute* "src/scripts/R.sh.in"
+                 (("uname") uname-bin)))))
          (add-before
           'configure 'set-default-pager
           ;; Set default pager to "cat", because otherwise it is "false",
@@ -169,6 +175,7 @@ be output in text, PostScript, PDF or HTML.")
      `(;; We need not only cairo here, but pango to ensure that tests for the
        ;; "cairo" bitmapType plotting backend succeed.
        ("pango" ,pango)
+       ("coreutils" ,coreutils)
        ("curl" ,curl)
        ("tzdata" ,tzdata)
        ("gfortran" ,gfortran)
-- 
2.10.0

Kind regards,
Roel Janssen