.

[gnulib.git] / m4 / getgroups.m4

diff --git a/m4/getgroups.m4 b/m4/getgroups.m4
index 7b94162..15f7abc 100644 (file)
--- a/m4/getgroups.m4
+++ b/m4/getgroups.m4
@@ -1,31 +1,47 @@
-#serial 1
+#serial 3
 
 dnl From Jim Meyering.
-dnl If you use this macro in a package, you should
-dnl add the following two lines to acconfig.h:
-dnl  /* Define to rpl_getgroups if the replacement function should be used.  */
-dnl  #undef getgroups
+dnl
+dnl Invoking code should check $GETGROUPS_LIB something like this:
+dnl  jm_FUNC_GETGROUPS
+dnl  test -n "$GETGROUPS_LIB" && LIBS="$GETGROUPS_LIB $LIBS"
 dnl
 
 AC_DEFUN(jm_FUNC_GETGROUPS,
 [AC_REQUIRE([AC_TYPE_GETGROUPS])dnl
  AC_REQUIRE([AC_TYPE_SIZE_T])dnl
- AC_CACHE_CHECK([for working getgroups], jm_cv_func_working_getgroups,
-  [AC_TRY_RUN([
-    int
-    main ()
-    {
-      /* On Ultrix 4.3, getgroups (0, 0) always fails.  */
-      exit (getgroups (0, 0) == -1 ? 1 : 0);
-    }
-             ],
-            jm_cv_func_working_getgroups=yes,
-             jm_cv_func_working_getgroups=no,
-            dnl When crosscompiling, assume getgroups is broken.
-            jm_cv_func_working_getgroups=no)
-  ])
-  if test $jm_cv_func_working_getgroups = no; then
-    LIBOBJS="$LIBOBJS getgroups.o"
-    AC_DEFINE_UNQUOTED(getgroups, rpl_getgroups)
+ AC_CHECK_FUNCS(getgroups)
+
+ # If we don't yet have getgroups, see if it's in -lbsd.
+ # This is reported to be necessary on an ITOS 3000WS running SEIUX 3.1.
+ if test $ac_cv_func_getgroups = no; then
+   jm_cv_sys_getgroups_saved_lib="$LIBS"
+   AC_CHECK_LIB(bsd, getgroups, [GETGROUPS_LIB=-lbsd])
+   LIBS="$jm_cv_sys_getgroups_saved_lib"
+ fi
+
+ # Run the program to test the functionality of the system-supplied
+ # getgroups function only if there is such a function.
+ if test $ac_cv_func_getgroups = yes; then
+   AC_CACHE_CHECK([for working getgroups], jm_cv_func_working_getgroups,
+    [AC_TRY_RUN([
+      int
+      main ()
+      {
+       /* On Ultrix 4.3, getgroups (0, 0) always fails.  */
+       exit (getgroups (0, 0) == -1 ? 1 : 0);
+      }
+               ],
+              jm_cv_func_working_getgroups=yes,
+              jm_cv_func_working_getgroups=no,
+              dnl When crosscompiling, assume getgroups is broken.
+              jm_cv_func_working_getgroups=no)
+    ])
+    if test $jm_cv_func_working_getgroups = no; then
+      AC_SUBST(LIBOBJS)
+      LIBOBJS="$LIBOBJS getgroups.$ac_objext"
+      AC_DEFINE_UNQUOTED(getgroups, rpl_getgroups,
+       [Define as rpl_getgroups if getgroups doesn't work right.])
+    fi
   fi
 ])