From 4a30e84e6182686fde93504e07616fe8e70d94d5 Mon Sep 17 00:00:00 2001
From: Ludovic Courtès <ludo@gnu.org>
Date: Sat, 25 Jul 2015 11:50:23 +0200
Subject: syscalls: 'define-c-struct' distinguishes pointers from integers.

* guix/build/syscalls.scm (read-type): Add special-case for when TYPE is '*.
---
 guix/build/syscalls.scm | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'guix')

diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm
index ae5b2ed112..73c54372e1 100644
--- a/guix/build/syscalls.scm
+++ b/guix/build/syscalls.scm
@@ -388,7 +388,11 @@ system to PUT-OLD."
                     (types ...) (fields ...))))))
 
 (define-syntax read-type
-  (syntax-rules (~)
+  (syntax-rules (~ quote *)
+    ((_ bv offset '*)
+     (make-pointer (bytevector-uint-ref bv offset
+                                        (native-endianness)
+                                        (sizeof* '*))))
     ((_ bv offset (type ~ order))
      (bytevector-uint-ref bv offset
                           (endianness order) (sizeof* type)))
-- 
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