Bug#1111499: opam fails to build with C23 due to illegal usage of Primitive macro in prims.h - new version available upstream

[Stéphane Glondu <glondu@debian.org>]

Hello,

Le 18/08/2025 à 18:52, Tim Andersson a écrit :
> Source: opam
> Version: 2.1.5-1
> [...]
> Here's the log:
> ```
> 138s # interp.c:957:14: note: in expansion of macro ‘Primitive’
> 138s # [...]
> 138s # caml/prims.h:33:23: error: too many arguments to function ‘(value (*)(void))*(caml_prim_table.contents + (sizetype)((long unsigned int)*pc * 8))’; expected 0, have 2
> 138s #    33 | #define Primitive(n) ((c_primitive)(caml_prim_table.contents[n]))
> 138s #       |                      ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 138s # interp.c:966:14: note: in expansion of macro ‘Primitive’
> 138s #   966 |       accu = Primitive(*pc)(sp + 2, nargs);
> 138s #       |              ^~~~~~~~~
> 138s # make[2]: *** [Makefile:366: interp.b.o] Error 1
> 138s # make[2]: Leaving directory '/tmp/tmp.fz1ILHJwgq/.opam/4.14.1/.opam-switch/build/ocaml-base-compiler.4.14.1/runtime'
> 138s # make[1]: *** [Makefile:163: coldstart] Error 2
> 138s # make[1]: Leaving directory '/tmp/tmp.fz1ILHJwgq/.opam/4.14.1/.opam-switch/build/ocaml-base-compiler.4.14.1'
> 138s # make: *** [Makefile:311: world.opt] Error 2
> ```

It looks like the error is in the "ocaml-base-compiler" package in opam. 
I'm afraid there is not much we can do on the Debian side.

> opam upstream has recently released version 2.4.1 of opam - perhaps an
> upload of the new version would fix the issue.

Maybe, maybe not. I will update opam when the current batch of recently 
updated OCaml packages migrates to testing.


Cheers,

--
Stéphane