Validate -pie if PIE is enabled by default

When PIE is enabled by default, -pie is treated as nop in driver.  We
should simply validate it, instead of issue an error.

	* gcc.c (driver_handle_option): Validate -pie if PIE is enabled
	by default.

From-SVN: r224987

1 files changed, 5 insertions, 0 deletions

diff --git a/gcc/gcc.c b/gcc/gcc.c
index d77c6c5..0f29b78 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -3893,6 +3893,11 @@ driver_handle_option (struct gcc_options *opts,
       save_switch ("-o", 1, &arg, validated, true);
       return true;
 
+#ifdef ENABLE_DEFAULT_PIE
+    case OPT_pie:
+      /* -pie is turned on by default.  */
+#endif
+
     case OPT_static_libgcc:
     case OPT_shared_libgcc:
     case OPT_static_libgfortran: