Re: Contents of <confdefs.h> for C++

[Akim Demaille]

| I guess the loop in _AC_PROG_CXX_EXIT_DECLARATION
| 
|   for ac_declaration in \
|    ''\
|    '#include <stdlib.h>' \
|    'extern "C" void std::exit (int) throw (); using std::exit;' \
|    'extern "C" void std::exit (int); using std::exit;' \
|    'extern "C" void exit (int) throw ();' \
|    'extern "C" void exit (int);' \
|    'void exit (int);'
| 
| could use one more alternative:
| 
|    '#include <cstdlib>
|    using std::exit;'
| 
| before the '#include <stdlib.h>' line.

Definitely.  Patch welcome :)