Fix broken MinGW build of gcc.c

2017-08-23  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * gcc.c (execute): Only test for SIGKILL and SIGQUIT if available.

From-SVN: r251302

gcc/ChangeLog

+2017-08-23  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
+	* gcc.c (execute): Only test for SIGKILL and SIGQUIT if available.
+
 2017-08-22  Daniel Santos  <daniel.santos@pobox.com>
 
 	* doc/install.texi: Modify to add more details on running selected

gcc/gcc.c

@@ -3154,8 +3154,13 @@ execute (void)
 	      switch (WTERMSIG (status))
 		{
 		case SIGINT:
+		/* SIGQUIT and SIGKILL are not available on MinGW.  */
+#ifdef SIGQUIT
 		case SIGQUIT:
+#endif
+#ifdef SIGKILL
 		case SIGKILL:
+#endif
 		case SIGTERM:
 		  /* The user (or environment) did something to the
 		     inferior.  Making this an ICE confuses the user