re PR lto/89896 (-flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.)

2019-04-03  Richard Biener  <rguenther@suse.de>

	PR lto/89896
	* lto-wrapper.c (run_gcc): Avoid implicit rules making
	the all target phony.

From-SVN: r270112

gcc/ChangeLog

+2019-04-03  Richard Biener  <rguenther@suse.de>
+
+	PR lto/89896
+	* lto-wrapper.c (run_gcc): Avoid implicit rules making
+	the all target phony.
+
 2019-04-02  Uroš Bizjak  <ubizjak@gmail.com>
 
 	PR target/89902

gcc/lto-wrapper.c

@@ -1665,7 +1665,9 @@ cont:
 	  struct pex_obj *pex;
 	  char jobs[32];
 
-	  fprintf (mstream, "all:");
+	  fprintf (mstream,
+		   ".PHONY: all\n"
+		   "all:");
 	  for (i = 0; i < nr; ++i)
 	    {
 	      int j = ltrans_priorities[i*2 + 1];