Use AC_CHECK_TYPES to check for struct statfs64

* m4/statfs.m4: Remove.
* configure.ac (AC_STATFS64): Remove.
(AC_CHECK_TYPES): Add struct statfs64.
* statfs.c: Replace HAVE_STATFS64 with HAVE_STRUCT_STATFS64.

configure.ac

@@ -191,7 +191,6 @@ AC_CHECK_MEMBERS(m4_normalize([
 	struct stat.st_gen,
 	struct stat.st_rdev
 ]))
-AC_STATFS64
 
 AC_TYPE_SIGNAL
 AC_TYPE_UID_T
@@ -262,6 +261,7 @@ AC_CHECK_MEMBERS([struct msghdr.msg_control],,, [#include <sys/socket.h>])
 AC_CHECK_TYPES([struct stat64],,, [#include <sys/types.h>
 #include <asm/stat.h>])
 AC_CHECK_TYPES([struct __old_kernel_stat],,, [#include <asm/stat.h>])
+AC_CHECK_TYPES([struct statfs64],,, [#include <sys/vfs.h>])
 
 AC_CHECK_TYPES([struct pt_all_user_regs, struct ia64_fpreg, struct ptrace_peeksiginfo_args],,,
 	       [#include <sys/ptrace.h>])

m4/statfs.m4

@@ -1,15 +0,0 @@
-dnl ### A macro to determine whether statfs64 is defined.
-AC_DEFUN([AC_STATFS64],
-[AC_MSG_CHECKING(for statfs64 in sys/vfs.h)
-AC_CACHE_VAL(ac_cv_type_statfs64,
-[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
-#include <linux/types.h>
-#include <sys/vfs.h>
-]], [[struct statfs64 st;]])],[ac_cv_type_statfs64=yes],[ac_cv_type_statfs64=no])])
-AC_MSG_RESULT($ac_cv_type_statfs64)
-if test "$ac_cv_type_statfs64" = yes
-then
-	AC_DEFINE([HAVE_STATFS64], 1,
-[Define if statfs64 is available in sys/vfs.h.])
-fi
-])

statfs.c

@@ -83,7 +83,7 @@ sys_fstatfs(struct tcb *tcp)
 	return 0;
 }
 
-#ifdef HAVE_STATFS64
+#ifdef HAVE_STRUCT_STATFS64
 static void
 printstatfs64(struct tcb *tcp, long addr)
 {
@@ -197,7 +197,7 @@ sys_fstatfs64(struct tcb *tcp)
 	}
 	return 0;
 }
-#endif /* HAVE_STATFS64 */
+#endif /* HAVE_STRUCT_STATFS64 */
 
 #ifdef ALPHA
 int