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[bug#36477] [PATCH v2 16/61] gnu: groff: Fix cross compilation.


From: Mathieu Othacehe
Subject: [bug#36477] [PATCH v2 16/61] gnu: groff: Fix cross compilation.
Date: Wed, 21 Aug 2019 10:54:10 +0200

* gnu/packages/groff.scm (groff)[arguments]: Replace build phase to pass
GROFF_BIN_PATH and GROFFBIN variables when cross-compiling.

Also add native groff as a native-input when cross-compiling.
---
 gnu/packages/groff.scm | 40 +++++++++++++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 3 deletions(-)

diff --git a/gnu/packages/groff.scm b/gnu/packages/groff.scm
index 98f17914bf..65b661cd79 100644
--- a/gnu/packages/groff.scm
+++ b/gnu/packages/groff.scm
@@ -5,6 +5,7 @@
 ;;; Copyright © 2017 Ludovic Courtès <address@hidden>
 ;;; Copyright © 2019 Efraim Flashner <address@hidden>
 ;;; Copyright © 2019 Eric Bavier <address@hidden>
+;;; Copyright © 2019 Mathieu Othacehe <address@hidden>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -55,7 +56,13 @@
    ;; from 'inputs'.
 
    (inputs `(("ghostscript" ,ghostscript)))
-   (native-inputs `(("bison" ,bison)
+
+   ;; When cross-compiling, this package depends upon a native install of
+   ;; itself.
+   (native-inputs `(,@(if (%current-target-system)
+                          `(("self" ,this-package))
+                          '())
+                    ("bison" ,bison)
                     ("perl" ,perl)
                     ("psutils" ,psutils)
                     ("texinfo" ,texinfo)))
@@ -94,7 +101,33 @@
           (lambda _         ;see https://savannah.gnu.org/bugs/index.php?55461
             (substitute* "Makefile.in"
               (("^docdir =.*") "docdir = @docdir@\n"))
-            #t)))))
+            #t))
+       ,@(if (%current-target-system)
+              '((replace 'build
+                 (lambda* (#:key
+                           make-flags parallel-build?
+                           native-inputs target #:allow-other-keys)
+                   ;; When cross-compiling, native groff is needed, see:
+                   ;; http://www.mail-archive.com/address@hidden/msg01335.html
+                   (let ((parallel
+                          (if parallel-build?
+                              `("-j" ,(number->string (parallel-job-count)))
+                              '()))
+                         (flags
+                          (if target
+                              (let ((groff (or
+                                            (assoc-ref native-inputs "groff")
+                                            (assoc-ref native-inputs "self"))))
+                                (append
+                                 make-flags
+                                 (list
+                                  (string-append "GROFF_BIN_PATH=" groff)
+                                  (string-append "GROFFBIN=" groff
+                                                 "/bin/groff"))))
+                              make-flags)))
+                     (apply invoke `("make" ,@parallel ,@flags)))
+                   #t)))
+              '()))))
    (synopsis "Typesetting from plain text mixed with formatting commands")
    (description
     "Groff is a typesetting package that reads plain text and produces
@@ -115,7 +148,8 @@ is usually the formatter of \"man\" documentation pages.")
     ;; Omit the DVI, PS, PDF, and HTML backends.
     (inputs '())
     (native-inputs `(("bison" ,bison)
-                     ("perl" ,perl)))
+                     ("perl" ,perl)
+                     ("groff" ,groff)))
 
     (arguments
      `(#:disallowed-references (,perl)
-- 
2.17.1






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