build-system/linux-module: Add #:source-directory to linux-module-build-cross.

Otherwise computing cross-compilation derivations for packages (e.g. xpadneo)
using the #:source-directory argument fails with this error:

  Unrecognized keyword: #:source-directory

* guix/build-system/linux-module.scm (linux-module-build-cross): Support
 #:source-directory.

diff --git a/guix/build-system/linux-module.scm b/guix/build-system/linux-module.scm
index 94a293d..d6c369d 100644 (file)
--- a/guix/build-system/linux-module.scm
+++ b/guix/build-system/linux-module.scm
@@ -210,6 +210,7 @@
           (tests? #f)
           (phases '%standard-phases)
           (system (%current-system))
+          (source-directory ".")
           (substitutable? #t)
           (imported-modules
            %linux-module-build-system-modules)
@@ -229,6 +230,7 @@
 
           (linux-module-build #:name #$name
                               #:source #+source
+                              #:source-directory #$source-directory
                               #:system #$system
                               #:target #$target
                               #:arch #$(system->arch (or target system))