[bug#66263] [PATCH v1 02/22] guix: gnu-build-system: Handle missing libc.

[Jean-Pierre De Jesus DIAZ]

* guix/build-system/gnu.scm (standard-cross-packages): Handle the case
  when `cross-libc` returns #f.

Change-Id: I85ee5456f10ff141d521a5f2d91267cd612c5616
---
 guix/build-system/gnu.scm | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/guix/build-system/gnu.scm b/guix/build-system/gnu.scm
index c1aa187c42..cdbb547773 100644
--- a/guix/build-system/gnu.scm
+++ b/guix/build-system/gnu.scm
@@ -460,10 +460,13 @@ (define standard-cross-packages
            `(("cross-gcc" ,(gcc target
                                 #:xbinutils (binutils target)
                                 #:libc libc))
-             ("cross-libc" ,libc)
+             ;; Some targets don't have a libc. (e.g. *-elf targets).
+             ,@(if libc
+                   `(("cross-libc" ,libc))
+                   '())
 
              ;; MinGW's libc doesn't have a "static" output.
-             ,@(if (member "static" (package-outputs libc))
+             ,@(if (and libc (member "static" (package-outputs libc)))
                    `(("cross-libc:static" ,libc "static"))
                    '()))))))))
 
-- 
2.41.0