mdadm: fix build without largefile support

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/mdadm/mdadm-2.6.1-003.uclibc-dont-force-largefile.patch

@@ -0,0 +1,27 @@
+[PATCH] mdadm: don't enable largefile support unconditionally on uClibc
+
+uClibc can be compiled without largefile support (and errors out if
+_FILE_OFFSET_BITS is set to 64), so don't define it if that combination
+is detected.
+
+Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
+---
+ mdadm.h |    4 ++++
+ 1 file changed, 4 insertions(+)
+
+Index: mdadm-2.6.7.1/mdadm.h
+===================================================================
+--- mdadm-2.6.7.1.orig/mdadm.h
++++ mdadm-2.6.7.1/mdadm.h
+@@ -28,7 +28,11 @@
+  */
+ 
+ #define	_GNU_SOURCE
++#include <features.h>
++/* uclibc without largefile support #errors on _FILE_OFFSET_BITS=64 */
++#if !(defined(__UCLIBC__) && !defined(__UCLIBC_HAS_LFS__))
+ #define _FILE_OFFSET_BITS 64
++#endif
+ #include	<unistd.h>
+ #if !defined(__dietlibc__) && !defined(__KLIBC__)
+ extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));