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digitalmars.D - Can D code be linked as part of C programs? (plug-ins in D?)

reply kll <kl mailinator.com> writes:
Can D code be linked as part of C programs?

e.g. can I write Apache module (dynamically linked .so file) using D?

I wonder if that's a matter of sneaking in D's runtime, starting GC, etc., or
is it not possible at all?
Feb 28 2009
next sibling parent reply Jarrett Billingsley <jarrett.billingsley gmail.com> writes:
On Sat, Feb 28, 2009 at 3:40 PM, kll <kl mailinator.com> wrote:
 Can D code be linked as part of C programs?

 e.g. can I write Apache module (dynamically linked .so file) using D?

Sure.
 I wonder if that's a matter of sneaking in D's runtime, starting GC, etc., or
is it not possible at all?

That's precisely what you do. If you compile the D piece of your program as a lib, including its runtime, you should be able to link C code to it. You'll have to call the runtime startup/teardown functions yourself, but it should work. I'm pretty sure people have made Apache modules in D before.
Feb 28 2009
parent kll <kl mailinator.com> writes:
Jarrett Billingsley Wrote:

 e.g. can I write Apache module (dynamically linked .so file) using D?

Sure.
 I wonder if that's a matter of sneaking in D's runtime, starting GC, etc., or
is it not possible at all?

That's precisely what you do. If you compile the D piece of your program as a lib, including its runtime, you should be able to link C code to it. You'll have to call the runtime startup/teardown functions yourself, but it should work. I'm pretty sure people have made Apache modules in D before.

Sorry, I couldn't find information how to do this (I'm a D noob). D site has only info how to link C with D, not D with C. It seems that DLL's a close to what I need (and I've found Apache module that uses them), but I'm not interested in Windows platform at all, I'm looking for Linux and OS X solution. Where should I look for this?
Mar 02 2009
prev sibling parent Jarrett Billingsley <jarrett.billingsley gmail.com> writes:
On Mon, Mar 2, 2009 at 7:57 AM, kll <kl mailinator.com> wrote:
 Jarrett Billingsley Wrote:

 e.g. can I write Apache module (dynamically linked .so file) using D?

Sure.
 I wonder if that's a matter of sneaking in D's runtime, starting GC, e=



 That's precisely what you do. =A0If you compile the D piece of your
 program as a lib, including its runtime, you should be able to link C
 code to it. =A0You'll have to call the runtime startup/teardown
 functions yourself, but it should work. =A0I'm pretty sure people have
 made Apache modules in D before.

Sorry, I couldn't find information how to do this (I'm a D noob). D site =

 It seems that DLL's a close to what I need (and I've found Apache module =

king for Linux and OS X solution.
 Where should I look for this?

It's strange, there doesn't seem to be much info on building shared libraries on Linux or OSX. It's actually pretty simple to do so. For one, I know you can't use DMD on Linux to build SOs. You'll have to use either GDC or LDC. I don't know what the situation is on OSX, but perhaps DMD will build dylibs correctly there since Walter's done a lot more work on making it generate correct position-independent code. I have no idea, though. To build an SO, you more or less just build your library as normal, and just link it a bit differently. I think DSSS/rebuild will also insert the init/fini code necessary for setting up and tearing down the runtime when the SO is loaded and unloaded. That's probably your best bet.
Mar 02 2009