Add autoconfig detection and workaround for daddr_t

Some systems don't have daddr_t in sys/types.h, so workaround this
by detecting and replacing with long if it does not exist.

Signed-off-by: Colin Ian King <colin.king@canonical.com>

Makefile.config

@@ -1521,6 +1521,14 @@ $(info autoconfig: using csinl)
 endif
 endif
 
+ifndef $(HAVE_DADDR_T)
+HAVE_DADDR_T = $(shell $(MAKE) -f Makefile.config --no-print-directory $(HAVE_NOT) TEST_PROG=test-daddr_t have_test_prog)
+ifeq ($(HAVE_DADDR_T),1)
+	CONFIG_CFLAGS += -DHAVE_DADDR_T
+$(info autoconfig: using daddr_t)
+endif
+endif
+
 ifndef $(HAVE_DARN)
 HAVE_DARN = $(shell $(MAKE) -f Makefile.config --no-print-directory $(HAVE_NOT) TEST_PROG=test-darn have_test_prog)
 ifeq ($(HAVE_DARN),1)

stress-ng.h

@@ -3752,7 +3752,11 @@ struct shim_statx {
 
 /* old ustat struct */
 struct shim_ustat {
+#if defined(HAVE_DADDR_T)
 	daddr_t	f_tfree;
+#else
+	long	f_tfree;
+#endif
 	ino_t	f_tinode;
 	char	f_fname[6];
 	char	f_fpack[6];

test/test-daddr_t.c

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2013-2020 Canonical, Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * This code is a complete clean re-write of the stress tool by
+ * Colin Ian King <colin.king@canonical.com> and attempts to be
+ * backwardly compatible with the stress tool by Amos Waterland
+ * <apw@rossby.metr.ou.edu> but has more stress tests and more
+ * functionality.
+ *
+ */
+#define  _GNU_SOURCE
+
+#include <sys/types.h>
+
+int main(void)
+{
+	daddr_t addr = 0;
+
+	(void)addr;
+}