AC_CHECK_HEADER(sys/statvfs.h, [ AC_DEFINE(HAVE_SYS_STATVFS_H,1,[Defines if your system have the sys/statvfs.h header file])] , )
AC_LANG_PUSH(C++)
-AC_CHECK_HEADERS([cxxabi.h execinfo.h], [ AC_DEFINE(HAVE_BACKTRACE,1,[Defines if your system have the cxxabi.h and execinfo.h header files for backtrace()])] , )
+AC_CHECK_FUNCS(backtrace)
AC_LANG_POP(C++)
dnl --------------------------------------------------------------------------