Fix cross compilers

Only native compilers support -run and hence the new -dT.

tcc.c

@@ -282,8 +282,10 @@ redo:
         n = s->nb_files;
         if (n == 0)
             tcc_error("no input files\n");
+#ifdef TCC_IS_NATIVE
         if (s->do_test)
             tcc_tool_test(s, argc, argv); /* maybe never returns */
+#endif
 
         if (s->output_type == TCC_OUTPUT_PREPROCESS) {
             if (!s->outfile) {

tcctools.c

@@ -543,6 +543,7 @@ ST_FUNC void gen_makedeps(TCCState *s, const char *target, const char *filename)
     fclose(depout);
 }
 
+#ifdef TCC_IS_NATIVE
 /* -------------------------------------------------------------- */
 /* run test snippets from file */
 
@@ -647,5 +648,6 @@ ST_FUNC int tcc_tool_test(TCCState *s, int argc, char **argv)
     tcc_free(buf);
     exit(0);
 }
+#endif /* TCC_IS_NATIVE */
 
 /* -------------------------------------------------------------- */