AC_USE_SYSTEM_EXTENSIONS
AC_DEFINE([__USE_BSD], 1, [Enable BSD extensions])
AC_DEFINE([_POSIX_C_SOURCE], 200809L, [Enable POSIX features])
AC_USE_SYSTEM_EXTENSIONS
AC_DEFINE([__USE_BSD], 1, [Enable BSD extensions])
AC_DEFINE([_POSIX_C_SOURCE], 200809L, [Enable POSIX features])