[Bug gprofng/32373] New: gprofng: sysinfo interception needs porting to Linux from Solaris

[sam at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=32373

            Bug ID: 32373
           Summary: gprofng: sysinfo interception needs porting to Linux
                    from Solaris
           Product: binutils
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gprofng
          Assignee: vladimir.mezentsev at oracle dot com
          Reporter: sam at gentoo dot org
  Target Milestone: ---

In gprofng/libcollector/libcol_util.c, we have:
```
  ptr = dlsym (libc, "sysinfo");
  if (ptr)
    __collector_util_funcs.sysinfo = (long (*)())ptr;
  else
    {
      CALL_UTIL (fprintf)(stderr, "collector_util_init COL_ERROR_UTIL_INIT
sysinfo: %s\n", dlerror ());
      err = COL_ERROR_UTIL_INIT;
    }
```

This came up when porting gprofng to C23 (GCC 15 now defaults to -std=gnu23)
and I noticed that the prototype we expect is different on Linux:
```
gprofng/src/collector_module.h:110:  long (*sysinfo)(int command, char *buf,
long count);
```

That's the Solaris prototype, see
https://docs.oracle.com/cd/E86824_01/html/E54765/sysinfo-2.html.

On Linux, it seems to be `int sysinfo(struct sysinfo *info)`.

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