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145
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1 /* GDC -- D front-end for GCC
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2 Copyright (C) 2013-2020 Free Software Foundation, Inc.
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3
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4 GCC is free software; you can redistribute it and/or modify it under
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5 the terms of the GNU General Public License as published by the Free
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6 Software Foundation; either version 3, or (at your option) any later
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7 version.
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8
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9 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with GCC; see the file COPYING3. If not see
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16 <http://www.gnu.org/licenses/>.
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17 */
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18
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19 /* This module provides the C main() function supplied by the user's program. */
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20
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21 module __entrypoint;
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22
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23 extern(C):
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24
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25 /* The D main() function supplied by the user's program
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26
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27 It always has `_Dmain` symbol name and uses C calling convention.
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28 But D frontend returns its type as `extern(D)` because of Issue 9028.
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29 As we need to deal with actual calling convention we have to mark it
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30 as `extern(C)` and use its symbol name.
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31 */
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32
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33 int _Dmain(char[][] args);
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34 int _d_run_main(int argc, char **argv, void* mainFunc);
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35
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36 /* Substitutes for the C main() function. Just calls into d_run_main with
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37 the default main function. Applications are free to implement their own
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38 main function and call the _d_run_main function themselves with any main
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39 function.
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40 */
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41
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42 int main(int argc, char **argv)
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43 {
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44 return _d_run_main(argc, argv, &_Dmain);
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45 }
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46
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47 /* This is apparently needed on Solaris because the C tool chain seems to
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48 expect the main function to be called _main. It needs both not just one!
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49 */
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50
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51 version (Solaris)
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52 int _main(int argc, char** argv)
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53 {
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54 return main(argc, argv);
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55 }
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56
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