[bug#36477] [PATCH v4 16/23] gnu: crda: Fix cross-compilation

[Mathieu Othacehe <m.othacehe@gmail.com>]

From: Pierre-Moana Levesque <pierre.moana.levesque@gmail.com>

* gnu/packages/linux.scm (crda)[arguments]: Patch Makefile to use cross
pkg-config when cross-compiling. Also search for wireless-regdb in both
native-inputs and inputs. Set CC variable to cross-compiler when
cross-compiling.
---
 gnu/packages/linux.scm | 67 ++++++++++++++++++++++++++----------------
 1 file changed, 42 insertions(+), 25 deletions(-)

diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index 8ba3c7d9db..177c8f44ed 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -2810,13 +2810,23 @@ interface.")
               (patches (search-patches "crda-optional-gcrypt.patch"))))
     (build-system gnu-build-system)
     (arguments
-     '(#:phases (modify-phases %standard-phases
+     `(#:phases (modify-phases %standard-phases
                   (delete 'configure)
                   (add-after 'unpack 'gzip-determinism
                     (lambda _
                       (substitute* "Makefile"
                         (("gzip") "gzip --no-name"))
                       #t))
+                  ,@(if (%current-target-system)
+                        '((add-after
+                            'unpack 'fix-pkg-config
+                            (lambda* (#:key target #:allow-other-keys)
+                                     (substitute*
+                                       "Makefile"
+                                       (("pkg-config")
+                                        (string-append target "-pkg-config")))
+                                     #t)))
+                        '())
                   (add-before
                    'build 'no-werror-no-ldconfig
                    (lambda _
@@ -2826,37 +2836,44 @@ interface.")
                      #t))
                   (add-before
                    'build 'set-regulator-db-file-name
-                   (lambda* (#:key inputs #:allow-other-keys)
+                   (lambda* (#:key native-inputs inputs #:allow-other-keys)
                      ;; Tell CRDA where to find our database.
-                     (let ((regdb (assoc-ref inputs "wireless-regdb")))
+                     (let ((regdb (assoc-ref (or native-inputs inputs)
+                                             "wireless-regdb")))
                        (substitute* "crda.c"
                          (("\"/lib/crda/regulatory.bin\"")
                           (string-append "\"" regdb
                                          "/lib/crda/regulatory.bin\"")))
                        #t))))
        #:test-target "verify"
-       #:make-flags (let ((out   (assoc-ref %outputs "out"))
-                          (regdb (assoc-ref %build-inputs "wireless-regdb")))
-                      (list "CC=gcc" "V=1"
-
-                            ;; Disable signature-checking on 'regulatory.bin'.
-                            ;; The reason is that this simplifies maintenance
-                            ;; on our side (no need to manage a distro key
-                            ;; pair), and we can guarantee integrity of
-                            ;; 'regulatory.bin' by other means anyway, such as
-                            ;; 'guix gc --verify'.  See
-                            ;; <https://wireless.wiki.kernel.org/en/developers/regulatory/wireless-regdb>
-                            ;; for a discssion.
-                            "USE_OPENSSL=0"
-
-                            (string-append "PREFIX=" out)
-                            (string-append "SBINDIR=" out "/sbin/")
-                            (string-append "UDEV_RULE_DIR="
-                                           out "/lib/udev/rules.d")
-                            (string-append "LDFLAGS=-Wl,-rpath="
-                                           out "/lib -L.")
-                            (string-append "REG_BIN=" regdb
-                                           "/lib/crda/regulatory.bin")))))
+       #:make-flags (let ((out     (assoc-ref %outputs "out"))
+                          (regdb   (assoc-ref %build-inputs "wireless-regdb"))
+                          (target ,(%current-target-system)))
+                      (list
+                       (string-append
+                        "CC=" (if target
+                                  (string-append target "-gcc") "gcc"))
+                       "V=1"
+
+                       ;; Disable signature-checking on 'regulatory.bin'.
+                       ;; The reason is that this simplifies maintenance
+                       ;; on our side (no need to manage a distro key
+                       ;; pair), and we can guarantee integrity of
+                       ;; 'regulatory.bin' by other means anyway, such as
+                       ;; 'guix gc --verify'.  See
+                       ;; <https://wireless.wiki.kernel.org/en/developers/regulatory/wireless-regdb>
+                       ;; for a discssion.
+                       "USE_OPENSSL=0"
+
+                       (string-append "PREFIX=" out)
+                       (string-append "SBINDIR=" out "/sbin/")
+                       (string-append "UDEV_RULE_DIR="
+                                      out "/lib/udev/rules.d")
+                       (string-append "LDFLAGS=-Wl,-rpath="
+                                      out "/lib -L.")
+                       (string-append "REG_BIN=" regdb
+                                      "/lib/crda/regulatory.bin")
+                       "all_noverify"))))
     (native-inputs `(("pkg-config" ,pkg-config)
                      ("python" ,python-2)
                      ("wireless-regdb" ,wireless-regdb)))
-- 
2.23.0