+sub dl_load_flags { 0x01 }

Wow !! I didn't realize that things were *that* simple on nix type operating systems. (I've just checked on my old mandrake-9.1 box, and things really *are* that simple.) There's certainly more than that required on Windows - though I realise that's probably something that's not an issue for the OP.

For a start, on Win32 we need to have the dll export the symbols - hence the usefulness of 'FUNCLIST'. (I was forgetting that probably wouldn't be an issue on most other operating systems.)

Secondly, on windows, there's a need to be able to resolve all symbols at compile-time. But, on my linux box, I've just realised there's no such condition to be met. As an example, the following Inline::C script runs fine on linux, but fails to build on windows: 
use warnings;

use Inline C => <<'EOC';

void extern crap();

void foo() {
     crap();
}

EOC

print "Compiled fine";

[download]
On linux (with gcc) that outputs simply Compiled fine, but on windows (using the MinGW port of gcc) the build phase fails with: 
try_pl_d349.o:try_pl_d349.c:(.text+0x5): undefined reference to `crap'
collect2: ld returned 1 exit status
dmake:  Error code 129, while making 'blib\arch\auto\try_pl_d349\try_p
+l_d349.dll

[download]
This is, no doubt, old news to many here ... but the starkness of the differences took me somewhat by surprise.

Cheers,
Rob

In reply to Re: Dynaloader/XS: sharing C symbols across shared objects by syphilis
in thread Dynaloader/XS: sharing C symbols across shared objects by creamygoodness

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