1 files changed, 52 insertions, 0 deletions
diff --git a/m4/macros/check_mnttab_opt.m4 b/m4/macros/check_mnttab_opt.m4
new file mode 100644
index 000000000000..97bdd7c85f87
--- /dev/null
+++ b/m4/macros/check_mnttab_opt.m4
@@ -0,0 +1,52 @@
+dnl ######################################################################
+dnl check the string type of the name of a filesystem mount table entry
+dnl option.
+dnl Usage: AMU_CHECK_MNTTAB_OPT(<fs>)
+dnl Check if there is an entry for MNTOPT_<fs> in sys/mntent.h or mntent.h
+dnl define MNTTAB_OPT_<fs> to the string name (e.g., "ro").
+AC_DEFUN([AMU_CHECK_MNTTAB_OPT],
+[
+# what name to give to the fs
+ac_fs_name=$1
+# store variable name of fs
+ac_upcase_fs_name=`echo $ac_fs_name | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+ac_safe=MNTTAB_OPT_$ac_upcase_fs_name
+# check for cache and set it if needed
+AMU_CACHE_CHECK_DYNAMIC(for mount table option $ac_fs_name,
+ac_cv_mnttab_opt_$ac_fs_name,
+[
+# undefine by default
+eval "ac_cv_mnttab_opt_$ac_fs_name=notfound"
+# and look to see if it was found
+AMU_EXPAND_CPP_STRING(
+AMU_MOUNT_HEADERS
+, MNTOPT_$ac_upcase_fs_name)
+# set cache variable to value
+if test "${value}" != notfound
+then
+  eval "ac_cv_mnttab_opt_$ac_fs_name=\\\"$value\\\""
+else
+  eval "ac_cv_mnttab_opt_$ac_fs_name=$value"
+fi
+dnl DO NOT CHECK FOR MNT_* b/c bsd44 systems don't use /etc/mnttab,
+])
+# outside cache check, if ok, define macro
+ac_tmp=`eval echo '$''{ac_cv_mnttab_opt_'$ac_fs_name'}'`
+if test "${ac_tmp}" != notfound
+then
+  AC_DEFINE_UNQUOTED($ac_safe, $ac_tmp)
+fi
+])
+dnl ======================================================================
+
+dnl ######################################################################
+dnl run AMU_CHECK_MNTTAB_OPT on each argument given
+dnl Usage: AMU_CHECK_MNTTAB_OPTS(arg arg arg ...)
+AC_DEFUN([AMU_CHECK_MNTTAB_OPTS],
+[
+for ac_tmp_arg in $1
+do
+AMU_CHECK_MNTTAB_OPT($ac_tmp_arg)
+done
+])
+dnl ======================================================================