Merge GCC frontend into the branch

gcc/lang-specs.h

@@ -0,0 +1,28 @@
+/* GCC driver specs for Elna frontend.
+   Copyright (C) 2025 Free Software Foundation, Inc.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+/* gcc/gcc.cc */
+{".elna",  "@elna", nullptr, 0, 0},
+{"@elna",
+    "elna1 %i \
+    %{!Q:-quiet} " DUMPS_OPTIONS("") " %{m*} %{aux-info*} \
+    %{g*} %{O*} %{W*&pedantic*} %{w} %{std*&ansi&trigraphs} \
+    %{pg:-p} %{p} %{f*} %{undef} \
+    %{!fsyntax-only:%{S:%W{o*}%{!o*:-o %w%b.s}}} \
+    %{fsyntax-only:-o %j} %{-param*} \
+    %{!fsyntax-only:%(invoke_as)}",
+    nullptr, 0, 0},