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D - C linking to D library ?

reply int_80h <int_80h_member pathlink.com> writes:
Can a C program be linked against a LIB built with D?
Feb 05 2003
next sibling parent reply Ilya Minkov <midiclub 8ung.at> writes:
int_80h wrote:
 Can a C program be linked against a LIB built with D?
 

Sure. you write in D something like extern(C) return_type functionName(type1 name1, type2 mane2) { // function does smth here } such a function can be directly consumed by a C programme. You might have an (OS-dependant) choice of other calling conventions, noted by extern(convention), which you might also want to use in your C program, "Pascal" and "Windows". Windows is known to you as "stdcall". The difference between both is AFAIK parameter order, and they are both faster and safer than the C calling convention, but probably not as fast as D internal calling convention. The drawback of "Windows" and "Pascal" is that they don't allow var_args, which are to be avoided anyway. -i.
Feb 05 2003
parent Ilya Minkov <midiclub 8ung.at> writes:
Oh, i didn't try, but it might be possible to write

extern(convention) {
...
}

and place all your library functions instead of "..." (and don't forget 
to replace "convention"), and thus wrap all at one shot.

-i.


Ilya Minkov wrote:
 int_80h wrote:
 
 Can a C program be linked against a LIB built with D?

Sure. you write in D something like extern(C) return_type functionName(type1 name1, type2 mane2) { // function does smth here } such a function can be directly consumed by a C programme. You might have an (OS-dependant) choice of other calling conventions, noted by extern(convention), which you might also want to use in your C program, "Pascal" and "Windows". Windows is known to you as "stdcall". The difference between both is AFAIK parameter order, and they are both faster and safer than the C calling convention, but probably not as fast as D internal calling convention. The drawback of "Windows" and "Pascal" is that they don't allow var_args, which are to be avoided anyway. -i.

Feb 05 2003
prev sibling parent Burton Radons <loth users.sourceforge.net> writes:
int_80h wrote:
 Can a C program be linked against a LIB built with D?

You need to use extern (C) as Ilya says, but you also need to boot up the runtime with this in C: extern void gc_init(); extern void gc_term(); extern void _minit(); extern void _moduleCtor(); extern void _moduleUnitTests(); void Dinit () { gc_init (); _minit (); _moduleCtor (); _moduleUnitTests (); } void Dterm () { gc_term (); } Global pointers shared with D might actually work properly, although using the same tool in C (DMC) would increase the chances of that. There're other concerns. It's not a well-trod path.
Feb 05 2003