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

Margaret Lewicka
Thu, 12 Feb 2015 17:28:47 -0000

---
 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