(input_from_pipe): New variable.

(do_spec): Set/clear input_from_pipe as appropriate.  Translate %|
to "-" if input_from_pipe is true.

From-SVN: r3018

diff --git a/gcc/gcc.c b/gcc/gcc.c
index 80d3eddc2a36b7afcb04d824be8fd6d5afd77831..050521d3d5a61b83ca5596d175eff4f837ea8678 100644 (file)
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -251,6 +251,7 @@ or with constant text in a single argument.
  %C     process CPP_SPEC as a spec.  A capital C is actually used here.
  %1    process CC1_SPEC as a spec.
  %2    process CC1PLUS_SPEC as a spec.
+ %|    output "-" if the input for the current command is coming from a pipe.
  %*    substitute the variable part of a matched option.  (See below.)
        Note that each comma in the substituted string is replaced by
        a single space.
@@ -2306,6 +2307,9 @@ static int this_is_output_file;
    search dirs for it.  */
 static int this_is_library_file;
 
+/* Nonzero means that the input of this command is coming from a pipe.  */
+static int input_from_pipe;
+
 /* Process the spec SPEC and run the commands specified therein.
    Returns 0 if the spec is successfully processed; -1 if failed.  */
 
@@ -2320,6 +2324,7 @@ do_spec (spec)
   delete_this_arg = 0;
   this_is_output_file = 0;
   this_is_library_file = 0;
+  input_from_pipe = 0;
 
   value = do_spec_1 (spec, 0, NULL_PTR);
 
@@ -2392,6 +2397,7 @@ do_spec_1 (spec, inswitch, soft_matched_part)
               Otherwise, execute now and don't pass the `|' as an arg.  */
            if (i < n_switches)
              {
+               input_from_pipe = 1;
                switches[i].valid = 1;
                break;
              }
@@ -2411,6 +2417,7 @@ do_spec_1 (spec, inswitch, soft_matched_part)
        delete_this_arg = 0;
        this_is_output_file = 0;
        this_is_library_file = 0;
+       input_from_pipe = 0;
        break;
 
       case '|':
@@ -2984,6 +2991,11 @@ do_spec_1 (spec, inswitch, soft_matched_part)
            }
            break;
 
+         case '|':
+           if (input_from_pipe)
+             do_spec_1 ("-", 0, NULL_PTR);
+           break;
+
          default:
            abort ();
          }