status of shared libs

[Maxim Fomin]

On Monday, 8 April 2013 at 11:21:07 UTC, Jacob Carlborg wrote:
> On 2013-04-08 11:51, Maxim Fomin wrote:
>
>> C main function need to be renamed or D main function should 
>> be supplied
>> (then a program would start from C code, not D, but this is 
>> not a problem)
>>
>> By the way, druntime links to _Dmain, but does not necessarily 
>> forwards
>> to it.
>
> The C main function defined in druntime forward to the D main 
> function. The C main function calls "_d_run_main" and passes in 
> a pointer to the D main function. "_d_run_main" then calls the 
> d main function. Indirectly the C main forwards to D main.

This is exactly why main() does not necessarily forwards to 
_Dmain().

import std.stdio;

alias extern(C) int function(char[][] args) MainFunc;

extern (C) int _d_run_main(int argc, char **argv, MainFunc 
mainFunc);

extern(C) int main(int argc, char** argv)
{
     return _d_run_main(argc, argv, &bar);
}

void main()
{
     writeln("D main");
}

extern(C) int bar(char[][] args)
{
     writeln("bar");
     return 0;
}

Guess what would happen.