[Libguestfs] [PATCH 2/3] builder: Check HAVE_POSIX_FADVISE before using it

[Margaret Lewicka]

---
 builder/pxzcat-c.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/builder/pxzcat-c.c b/builder/pxzcat-c.c
index 0bbd296..dec9cc2 100644
--- a/builder/pxzcat-c.c
+++ b/builder/pxzcat-c.c
@@ -214,8 +214,10 @@ pxzcat (value filenamev, value outputfilev, unsigned nr_threads)
     unix_error (err, (char *) "ftruncate", outputfilev);
   }
 
+#if defined HAVE_POSIX_FADVISE
   /* Tell the kernel we won't read the output file. */
   ignore_value (posix_fadvise (fd, 0, 0, POSIX_FADV_RANDOM|POSIX_FADV_DONTNEED));
+#endif
 
   /* Iterate over blocks. */
   iter_blocks (idx, nr_threads, filenamev, fd, outputfilev, ofd);
-- 
1.9.3