dnl @synopsis AC_CXX_DTOR_AFTER_ATEXIT
dnl
dnl If the C++ compiler calls global destructors after atexit functions,
dnl define HAVE_DTOR_AFTER_ATEXIT.
dnl WARNING: If cross-compiling, the test cannot be performed, the
dnl default action is to define HAVE_DTOR_AFTER_ATEXIT.
dnl
dnl @version $Id: ac_cxx_dtor_after_atexit.m4,v 1.1.1.1 2001/07/26 00:46 ac-archive-0.5.32 $
dnl @author Luc Maisonobe
dnl
AC_DEFUN([AC_CXX_DTOR_AFTER_ATEXIT],
[AC_CACHE_CHECK(whether the compiler calls global destructors after functions registered through atexit,
ac_cv_cxx_dtor_after_atexit,
[AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 AC_TRY_RUN([
#include <unistd.h>
#include <stdlib.h>

static int dtor_called = 0;
class A { public : ~A () { dtor_called = 1; } };
static A a;

void f() { _exit(dtor_called); }

int main (int , char **)
{
  atexit (f);
  return 0;
}
],
 ac_cv_cxx_dtor_after_atexit=yes, ac_cv_cxx_dtor_after_atexit=yes=no,
 ac_cv_cxx_dtor_after_atexit=yes)
 AC_LANG_RESTORE
])
if test "$ac_cv_cxx_dtor_after_atexit" = yes; then
  AC_DEFINE(HAVE_DTOR_AFTER_ATEXIT,,
            [define if the compiler calls global destructors after functions registered through atexit])
fi
])

