Merge GCC frontend into the branch

source/cstdlib.elna

@@ -0,0 +1,15 @@
+(* This Source Code Form is subject to the terms of the Mozilla Public License,
+  v. 2.0. If a copy of the MPL was not distributed with this file, You can
+  obtain one at https://mozilla.org/MPL/2.0/. *)
+module;
+
+proc malloc(size: Word) -> Pointer; extern;
+proc free(ptr: Pointer); extern;
+proc calloc(nmemb: Word, size: Word) -> Pointer; extern;
+proc realloc(ptr: Pointer, size: Word) -> Pointer; extern;
+
+proc atoi(str: ^Char) -> Int; extern;
+
+proc exit(code: Int) -> !; extern;
+
+end.