AC_DEFUN([jm_FUNC_REALLOC],
[
AC_DEFINE(HAVE_DONE_WORKING_REALLOC_CHECK, 1,
[Define if the realloc check has been performed. ])
AC_CACHE_CHECK([whether realloc(0,0) returns a non-NULL pointer],
jm_cv_func_working_realloc,
[AC_TRY_RUN([
char *realloc ();
int
main ()
{
exit (realloc (0, 0) ? 0 : 1);
}
],
jm_cv_func_working_realloc=yes,
jm_cv_func_working_realloc=no,
jm_cv_func_working_realloc=no)
])
if test $jm_cv_func_working_realloc = no; then
AC_LIBOBJ(realloc)
AC_DEFINE(realloc, rpl_realloc,
[Define to rpl_realloc if the replacement function should be used.])
fi
])