(UTILS_FUNC_DIRFD): Test the cache variable, not one

that is guaranteed to be `no'.  Use `no_such_member' to indicate
that condition, rather than `-1' which is slightly misleading.
Change the name of the cache variable to have the gl_ prefix.
Prompted by a patch from Richard Dawe for DJGPP.

diff --git a/m4/dirfd.m4 b/m4/dirfd.m4
index 16f54d4c3a11cb895584ed4385578690b905990f..a13299f5efd1e7c1ca46e22398bc398fd5e3061e 100644 (file)
--- a/m4/dirfd.m4
+++ b/m4/dirfd.m4
@@ -1,4 +1,4 @@
-#serial 5
+#serial 6
 
 dnl Find out how to get the file descriptor associated with an open DIR*.
 dnl From Jim Meyering
@@ -45,7 +45,7 @@ AC_DEFUN([UTILS_FUNC_DIRFD],
     AC_REPLACE_FUNCS([dirfd])
     AC_CACHE_CHECK(
              [how to get the file descriptor associated with an open DIR*],
-                  ac_cv_sys_dir_fd_member_name,
+                  gl_cv_sys_dir_fd_member_name,
       [
         dirfd_save_CFLAGS=$CFLAGS
        for ac_expr in d_fd dd_fd; do
@@ -60,14 +60,14 @@ AC_DEFUN([UTILS_FUNC_DIRFD],
          CFLAGS=$dirfd_save_CFLAGS
          test "$dir_fd_found" = yes && break
        done
-       test "$dir_fd_found" = yes || ac_expr=-1
+       test "$dir_fd_found" = yes || ac_expr=no_such_member
 
-       ac_cv_sys_dir_fd_member_name=$ac_expr
+       gl_cv_sys_dir_fd_member_name=$ac_expr
       ]
     )
-    if test $ac_cv_have_decl_dirfd = no; then
+    if test $gl_cv_sys_dir_fd_member_name != no_such_member; then
       AC_DEFINE_UNQUOTED(DIR_FD_MEMBER_NAME,
-       $ac_cv_sys_dir_fd_member_name,
+       $gl_cv_sys_dir_fd_member_name,
        [the name of the file descriptor member of DIR])
     fi
     AH_VERBATIM(DIR_TO_FD,