[Bug sim/34536] New: sim doesn't build on Solaris

https://sourceware.org/bugzilla/show_bug.cgi?id=34536

            Bug ID: 34536
           Summary: sim doesn't build on Solaris
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: sim
          Assignee: unassigned at sourceware dot org
          Reporter: ro at gcc dot gnu.org
                CC: vapier at gentoo dot org
  Target Milestone: ---
            Target: *-*-solaris2.11

Building sim on Solaris 11.4 with the bundled gcc 16 fails:

  CC       igen/igen.o
In file included from ../../binutils-gdb/sim/igen/igen.c:23:
/usr/include/stdlib.h:307:12: error: conflicting types for ‘getopt’; have
‘int(int,  char * const*, const char *)’
  307 | extern int getopt(int, char *const *, const char *);
      |            ^~~~~~
In file included from ../../binutils-gdb/sim/igen/igen.c:22:
../../binutils-gdb/sim/../include/getopt.h:115:12: note: previous declaration
of ‘getopt’ with type ‘int(void)’
  115 | extern int getopt ();
      |            ^~~~~~
In file included from ../../binutils-gdb/sim/igen/misc.h:36,
                 from ../../binutils-gdb/sim/igen/igen.c:25:
/usr/include/stdio.h:362:17: error: conflicting types for ‘getopt’; have
‘int(int,  char * const*, const char *)’
  362 | extern int      getopt(int, char *const *, const char *);
      |                 ^~~~~~
../../binutils-gdb/sim/../include/getopt.h:115:12: note: previous declaration
of ‘getopt’ with type ‘int(void)’
  115 | extern int getopt ();
      |            ^~~~~~

<getopt.h> is included first thing without HAVE_DECL_GETOPT having been defined
first (i.e. config.h being included either directly or via sim/common/defs.h).

This occurs with the default configure options of a gdb buildbot.  Since
there's
no point in testing sim for native-only gdb, I'm not going to pursue this but
just disable sim.

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