[Bug build/29798] New: symtab.c doesn't compile with 32-bit GCC 12

["ro at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29798

            Bug ID: 29798
           Summary: symtab.c doesn't compile with 32-bit GCC 12
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: ro at gcc dot gnu.org
  Target Milestone: 13.1

Compiling symtab.c with a 32-bit GCC 12 (12.2.0 on Solaris 11.4 in my case)
fails like this:

/vol/src/gnu/gdb/hg/master/local/gdb/symtab.c: In member function
‘std::vector<symbol_search> global_symbol_searcher::search() const’:
/vol/src/gnu/gdb/hg/master/local/gdb/symtab.c:4961:44: error: ‘std::sprintf’
may write a terminating nul past the end of the destination
[-Werror=format-overflow=]
 4961 |               sprintf (tmp, "operator%.*s%s", fix, " ", opname);
      |                                            ^
/vol/src/gnu/gdb/hg/master/local/gdb/symtab.c:4961:23: note: ‘std::sprintf’
output between 9 and 2147483648 bytes into a destination of size 2147483647
 4961 |               sprintf (tmp, "operator%.*s%s", fix, " ", opname);
      |               ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I'm uncertain how best to address this.

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