Make -flto=jobserver parallel again.

2019-08-23  Martin Liska  <mliska@suse.cz>

	* lto-wrapper.c (run_gcc): When setting jobserver
	set also parallel to 1.  This was done so before r273908.

From-SVN: r274849

gcc/ChangeLog

+2019-08-23  Martin Liska  <mliska@suse.cz>
+
+	* lto-wrapper.c (run_gcc): When setting jobserver
+	set also parallel to 1.  This was done so before r273908.
+
 2019-08-23  Dennis Zhang  <dennis.zhang@arm.com>
 
 	* config/arm/arm-cpus.in (cortex-m35p): New entry.

gcc/lto-wrapper.c

@@ -1374,7 +1374,10 @@ run_gcc (unsigned argc, char *argv[])
 
 	case OPT_flto_:
 	  if (strcmp (option->arg, "jobserver") == 0)
-	    jobserver = 1;
+	    {
+	      parallel = 1;
+	      jobserver = 1;
+	    }
 	  else if (strcmp (option->arg, "auto") == 0)
 	    {
 	      parallel = 1;
@@ -1423,8 +1426,11 @@ run_gcc (unsigned argc, char *argv[])
       auto_parallel = 0;
       parallel = 0;
     }
-  else if (!jobserver)
-    jobserver = jobserver_active_p ();
+  else if (!jobserver && jobserver_active_p ())
+    {
+      parallel = 1;
+      jobserver = 1;
+    }
 
   if (linker_output)
     {