1/* GDC -- D front-end for GCC
2   Copyright (C) 2013-2021 Free Software Foundation, Inc.
3
4   GCC is free software; you can redistribute it and/or modify it under
5   the terms of the GNU General Public License as published by the Free
6   Software Foundation; either version 3, or (at your option) any later
7   version.
8
9   GCC is distributed in the hope that it will be useful, but WITHOUT ANY
10   WARRANTY; without even the implied warranty of MERCHANTABILITY or
11   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12   for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with GCC; see the file COPYING3.  If not see
16   <http://www.gnu.org/licenses/>.
17*/
18
19/* This module provides the C main() function supplied by the user's program.  */
20
21module __entrypoint;
22
23extern(C):
24
25/* The D main() function supplied by the user's program
26
27   It always has `_Dmain` symbol name and uses C calling convention.
28   But D frontend returns its type as `extern(D)` because of Issue 9028.
29   As we need to deal with actual calling convention we have to mark it
30   as `extern(C)` and use its symbol name.
31*/
32
33int _Dmain(char[][] args);
34int _d_run_main(int argc, char **argv, void* mainFunc);
35
36/* Substitutes for the C main() function.  Just calls into d_run_main with
37   the default main function.  Applications are free to implement their own
38   main function and call the _d_run_main function themselves with any main
39   function.
40*/
41
42int main(int argc, char **argv)
43{
44    return _d_run_main(argc, argv, &_Dmain);
45}
46
47/* This is apparently needed on Solaris because the C tool chain seems to
48   expect the main function to be called _main.  It needs both not just one!
49*/
50
51version (Solaris)
52int _main(int argc, char** argv)
53{
54    return main(argc, argv);
55}
56
57