Build of 4.0.0 fails with GCC 15

[gruenich]

I tried to update openSuse's packe to ior 4.0.0. The build fails, probably due to more restrict evaluation of GCC 15.

[   16s] mpicc -DHAVE_CONFIG_H -I.      -Icheck/include -Icheck/include  -O2 -Wall -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g -c -o ior-aiori-RADOS.o `test -f 'aiori-RADOS.c' || echo './'`aiori-RADOS.c
[   16s] aiori-RADOS.c:71:19: error: initialization of ‘aiori_fd_t * (*)(char *, int,  aiori_mod_opt_t *)’ from incompatible pointer type ‘void * (*)(char *, IOR_param_t *)’ [-Wincompatible-pointer-types]
[   16s]    71 |         .create = RADOS_Create,
[   16s]       |                   ^~~~~~~~~~~~
[   16s] aiori-RADOS.c:71:19: note: (near initialization for ‘rados_aiori.create’)
[   16s] aiori-RADOS.c:52:14: note: ‘RADOS_Create’ declared here
[   16s]    52 | static void *RADOS_Create(char *, IOR_param_t *);
[   16s]       |              ^~~~~~~~~~~~
[   16s] aiori-RADOS.c:72:17: error: initialization of ‘aiori_fd_t * (*)(char *, int,  aiori_mod_opt_t *)’ from incompatible pointer type ‘void * (*)(char *, IOR_param_t *)’ [-Wincompatible-pointer-types]
[   16s]    72 |         .open = RADOS_Open,
[   16s]       |                 ^~~~~~~~~~
[   16s] aiori-RADOS.c:72:17: note: (near initialization for ‘rados_aiori.open’)
[   16s] aiori-RADOS.c:53:14: note: ‘RADOS_Open’ declared here
[   16s]    53 | static void *RADOS_Open(char *, IOR_param_t *);
[   16s]       |              ^~~~~~~~~~
[   16s] aiori-RADOS.c:73:17: error: initialization of ‘IOR_offset_t (*)(int,  aiori_fd_t *, IOR_size_t *, IOR_offset_t,  IOR_offset_t,  aiori_mod_opt_t *)’ {aka ‘long long int (*)(int,  aiori_fd_t *, long long int *, long long int,  long long int,  aiori_mod_opt_t *)’} from incompatible pointer type ‘IOR_offset_t (*)(int,  void *, IOR_size_t *, IOR_offset_t,  IOR_param_t *)’ {aka ‘long long int (*)(int,  void *, long long int *, long long int,  IOR_param_t *)’} [-Wincompatible-pointer-types]
[   16s]    73 |         .xfer = RADOS_Xfer,
[   16s]       |                 ^~~~~~~~~~
[   16s] aiori-RADOS.c:73:17: note: (near initialization for ‘rados_aiori.xfer’)
[   16s] aiori-RADOS.c:54:21: note: ‘RADOS_Xfer’ declared here
[   16s]    54 | static IOR_offset_t RADOS_Xfer(int, void *, IOR_size_t *,
[   16s]       |                     ^~~~~~~~~~