-#serial 2
+#serial 8
dnl From Jim Meyering.
dnl Determine whether chown accepts arguments of -1 for uid and gid.
dnl If it doesn't, arrange to use the replacement function.
dnl
-dnl If you use this macro in a package, you should
-dnl add the following two lines to acconfig.h:
-dnl /* Define to rpl_chown if the replacement function should be used. */
-dnl #undef chown
-dnl
-
-AC_DEFUN(jm_FUNC_CHOWN,
-[AC_REQUIRE([AC_TYPE_UID_T])dnl
- test -z "$ac_cv_header_unistd_h" \
- && AC_CHECK_HEADERS(unistd.h)
- AC_CACHE_CHECK([for working chown], jm_cv_func_working_chown,
- [AC_TRY_RUN([
-# include <sys/types.h>
-# include <fcntl.h>
-# ifdef HAVE_UNISTD_H
-# include <unistd.h>
-# endif
- int
- main ()
- {
- char *f = "conftestchown";
- if (creat (f, 0600) < 0)
- exit (1);
- exit (chown (f, (uid_t) -1, (gid_t) -1) == -1 ? 1 : 0);
- }
- ],
- jm_cv_func_working_chown=yes,
- jm_cv_func_working_chown=no,
- dnl When crosscompiling, assume chown is broken.
- jm_cv_func_working_chown=no)
- ])
- if test $jm_cv_func_working_chown = no; then
- LIBOBJS="$LIBOBJS chown.o"
- AC_DEFINE_UNQUOTED(chown, rpl_chown)
+AC_DEFUN([jm_FUNC_CHOWN],
+[
+ AC_REQUIRE([AC_TYPE_UID_T])dnl
+ AC_REQUIRE([AC_FUNC_CHOWN])
+ if test $ac_cv_func_chown_works = no; then
+ AC_LIBOBJ(chown)
+ AC_DEFINE(chown, rpl_chown,
+ [Define to rpl_chown if the replacement function should be used.])
+ gl_PREREQ_CHOWN
fi
])
+
+# Prerequisites of lib/chown.c.
+AC_DEFUN([gl_PREREQ_CHOWN],
+[
+ AC_CHECK_HEADERS_ONCE(unistd.h)
+])