-tar_GNULIB
-
-
-AC_CHECK_MEMBERS([struct stat.st_spare1, struct stat.st_atim.tv_nsec, struct stat.st_atimespec.tv_nsec, struct stat.st_atimensec], , ,
- [
-#include <sys/types.h>
-#include <sys/stat.h>])
-
-# Save and restore LIBS so e.g., -lrt, isn't added to it. Otherwise, *all*
-# programs in the package would end up linked with that potentially-shared
-# library, inducing unnecessary run-time overhead.
-
-# Solaris 2.5.1 needs -lposix4 to get the clock_gettime function.
-# Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
-tar_save_LIBS=$LIBS
- LIB_CLOCK_GETTIME=
- AC_SEARCH_LIBS(clock_gettime, [rt posix4])
- case "$ac_cv_search_clock_gettime" in
- -l*) LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime;;
- esac
- AC_SUBST(LIB_CLOCK_GETTIME)
- AC_CHECK_FUNCS(clock_gettime)
-LIBS=$tar_save_LIBS
+gl_INIT
+# paxutils modules
+tar_PAXUTILS
+
+TAR_HEADERS_ATTR_XATTR_H
+
+AC_CHECK_FUNCS_ONCE([fchmod fchown fsync lstat mkfifo readlink symlink])
+
+# we use gnulib's acl.h - because of very useful file_has_acl() function. M4
+# file from gnulib/acl does a quite good job of course. The problem is that
+# this function works on wide list of platforms and we need to restrict tar to
+# use POSIX.1e ACLs only.
+AC_ARG_WITH([posix-acls],
+ AS_HELP_STRING([--without-posix-acls],
+ [do not use POSIX.1e access control lists]),
+ [with_posix_acls=no])
+AC_CHECK_HEADERS(sys/acl.h,, [with_posix_acl=no])
+AC_SEARCH_LIBS([acl_get_file], [acl pacl],, [with_posix_acl=no])
+AC_SEARCH_LIBS([acl_get_fd], [acl pacl],, [with_posix_acl=no])
+AC_SEARCH_LIBS([acl_set_file], [acl pacl],, [with_posix_acl=no])
+AC_SEARCH_LIBS([acl_set_fd], [acl pacl],, [with_posix_acl=no])
+AC_SEARCH_LIBS([acl_to_text], [acl pacl],, [with_posix_acl=no])
+AC_SEARCH_LIBS([acl_from_text], [acl pacl],, [with_posix_acl=no])
+if test "x$with_posix_acls" != xno; then
+ AC_DEFINE(HAVE_POSIX_ACLS,,[Define when we have working POSIX acls])
+fi