When building perl-Compress-LZF using an instrumented gcc to find issues that will affect GCC 14 (see https://fedoraproject.org/wiki/Toolchain/PortingToModernC#Special_COPR_repository_with_instrumented_GCC), I got this error:

In file included from LZF.xs:5:
/usr/include/perlmulticore.h:195:8: error: initialization of ‘void (*)(PerlInterpreter *)’ {aka ‘void (*)(struct interpreter *)’} from incompatible pointer type ‘void (*)(void)’
  195 |    = { perl_multicore_init, 0 };
      |        ^~~~~~~~~~~~~~~~~~~

The relevant part of perlmulticore.h is this:

--------------------------------------------------------------------------
/* this struct is shared between all modules, and currently */
/* contain only the two function pointers for release/acquire */
struct perl_multicore_api
{
  void (*pmapi_release)(pTHX);
  void (*pmapi_acquire)(pTHX);
};

static void perl_multicore_init (void);

static const struct perl_multicore_api perl_multicore_api_init
   = { perl_multicore_init, 0 };
--------------------------------------------------------------------------

The parameter mismatch seems to have been introduced in the downstream patch Coro-Multicore-1.04-Fix-passing-context.patch.

The same issue shows up when building perl-Coro-Multicore itself using the COPR version of gcc.

Reproducible: Always

Steps to Reproduce:
Try to build perl-Coro-Multicore using the mock configuration shown at https://fedoraproject.org/wiki/Toolchain/PortingToModernC#Special_COPR_repository_with_instrumented_GCC