[bug#65486] [PATCH v3] syscalls: Consistently use existing linux? definition

[soeren@soeren-tempel.net]

From: Sören Tempel <soeren@soeren-tempel.net>

Instead of duplicating this existing logic across the source file. This
will make it easier to add additional linux targets (e.g. linux-musl) in
the future.

* guix/build/syscalls.scm (readdir*): Use linux? constant.
* guix/build/syscalls.scm (write-socket-address!): Use linux? constant.
* guix/build/syscalls.scm (read-socket-address): Use linux? constant.

Signed-off-by: Sören Tempel <soeren@soeren-tempel.net>
---
 guix/build/syscalls.scm | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm
index d947b010d3..c9c0bf594d 100644
--- a/guix/build/syscalls.scm
+++ b/guix/build/syscalls.scm
@@ -1244,7 +1244,7 @@ (define (readdir-procedure name-field-offset sizeof-dirent-header
 
 (define readdir*
   ;; Decide at run time which one must be used.
-  (if (string-contains %host-type "linux-gnu")
+  (if linux?
       (readdir-procedure (c-struct-field-offset %struct-dirent-header/linux
                                                 name)
                          sizeof-dirent-header/linux
@@ -1664,7 +1664,7 @@ (define (write-socket-address!/hurd sockaddr bv index)
            (error "unsupported socket address" sockaddr)))))
 
 (define write-socket-address!
-  (if (string-contains %host-type "linux-gnu")
+  (if linux?
       write-socket-address!/linux
       write-socket-address!/hurd))
 
@@ -1696,7 +1696,7 @@ (define* (read-socket-address/hurd bv #:optional (index 0))
            (vector family)))))
 
 (define read-socket-address
-  (if (string-contains %host-type "linux-gnu")
+  (if linux?
       read-socket-address/linux
       read-socket-address/hurd))