Fix building on x86 when older linux headers lack __NR_fallocate define.

URL: http://bugs.gentoo.org/274269
Reported-by: Mikael Magnusson <mikachu@gmail.com>

2009-11-09  Mike Frysinger  <vapier@gentoo.org>

	* sysdeps/unix/sysv/linux/i386/fallocate.c: Include errno.h.
	(fallocate): Return ENOSYS if __NR_fallocate is not defined.
	* sysdeps/unix/sysv/linux/i386/fallocate64.c: Likewise.

diff --git a/sysdeps/unix/sysv/linux/i386/fallocate.c b/sysdeps/unix/sysv/linux/i386/fallocate.c
index 7a943e4..14e7883 100644
--- a/sysdeps/unix/sysv/linux/i386/fallocate.c
+++ b/sysdeps/unix/sysv/linux/i386/fallocate.c
@@ -16,6 +16,7 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#include <errno.h>
 #include <fcntl.h>
 #include <sysdep.h>
 
@@ -28,5 +29,10 @@ extern int __call_fallocate (int fd, int mode, __off64_t offset, __off64_t len)
 int
 fallocate (int fd, int mode, __off_t offset, __off_t len)
 {
+#ifdef __NR_fallocate
   return __call_fallocate (fd, mode, offset, len);
+#else
+  __set_errno (ENOSYS);
+  return -1;
+#endif
 }
diff --git a/sysdeps/unix/sysv/linux/i386/fallocate64.c b/sysdeps/unix/sysv/linux/i386/fallocate64.c
index 4998f5e..85f315c 100644
--- a/sysdeps/unix/sysv/linux/i386/fallocate64.c
+++ b/sysdeps/unix/sysv/linux/i386/fallocate64.c
@@ -16,6 +16,7 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#include <errno.h>
 #include <fcntl.h>
 #include <sysdep.h>
 
@@ -28,5 +29,10 @@ extern int __call_fallocate (int fd, int mode, __off64_t offset, __off64_t len)
 int
 fallocate64 (int fd, int mode, __off64_t offset, __off64_t len)
 {
+#ifdef __NR_fallocate
   return __call_fallocate (fd, mode, offset, len);
+#else
+  __set_errno (ENOSYS);
+  return -1;
+#endif
 }