[PR87833] x86: Put -fPIC and -shared the last to create offload image

On x86, since -fPIC and -shared should be used to create offload image,
we put them the last to properly create offload image.

2019-11-11  H.J. Lu  <hjl.tools@gmail.com>

	PR target/87833
	* config/i386/intelmic-mkoffload.c (prepare_target_image): Put
	-fPIC and -shared the last to create offload image.

From-SVN: r278041

gcc/ChangeLog

+2019-11-11  H.J. Lu  <hjl.tools@gmail.com>
+
+	PR target/87833
+	* config/i386/intelmic-mkoffload.c (prepare_target_image): Put
+	-fPIC and -shared the last to create offload image.
+
 2019-11-11  Thomas Schwinge  <thomas@codesourcery.com>
 
 	* gimplify.c (gimplify_scan_omp_clauses): Assert 'offset2' instead

gcc/config/i386/intelmic-mkoffload.c

@@ -453,8 +453,6 @@ prepare_target_image (const char *target_compiler, int argc, char **argv)
   if (verbose)
     obstack_ptr_grow (&argv_obstack, "-v");
   obstack_ptr_grow (&argv_obstack, "-xlto");
-  obstack_ptr_grow (&argv_obstack, "-shared");
-  obstack_ptr_grow (&argv_obstack, "-fPIC");
   obstack_ptr_grow (&argv_obstack, opt1);
   for (int i = 1; i < argc; i++)
     {
@@ -466,6 +464,9 @@ prepare_target_image (const char *target_compiler, int argc, char **argv)
   if (!out_obj_filename)
     fatal_error (input_location, "output file not specified");
   obstack_ptr_grow (&argv_obstack, opt2);
+  /* NB: Put -fPIC and -shared the last to create shared library.  */
+  obstack_ptr_grow (&argv_obstack, "-fPIC");
+  obstack_ptr_grow (&argv_obstack, "-shared");
   obstack_ptr_grow (&argv_obstack, "-o");
   obstack_ptr_grow (&argv_obstack, target_so_filename);
   compile_for_target (&argv_obstack);