Running aclocal... configure.in:36: warning: _AC_Header_netinet_in_ is m4_require'd but not m4_defun'd autoconf/headers.m4:218: AC_CHECK_HEADERS_ONCE is expanded from... configure.in:36: the top level configure.in:36: warning: _AC_Header_windows_ is m4_require'd but not m4_defun'd configure.in:36: warning: _AC_Header_wnsock2_h is m4_require'd but not m4_defun'd Running autoheader... configure.in:36: warning: _AC_Header_i_i_h is m4_require'd but not m4_defun'd autoconf/headers.m4:218: AC_CHECK_HEADERS_ONCE is expanded from... configure.in:36: the top level configure.in:36: warning: _AC_Header_sys__h is m4_require'd but not m4_defun'd configure.in:36: warning: _AC_Header_ind_h is m4_require'd but not m4_defun'd configure.in:36: warning: _AC_Header_wins_h is m4_require'd but not m4_defun'd Running autoconf... configure.in:36: warning: _AC_Header_i_i_h is m4_require'd but not m4_defun'd autoconf/headers.m4:218: AC_CHECK_HEADERS_ONCE is expanded from... configure.in:36: the top level configure.in:36: warning: _AC_Header_sys__h is m4_require'd but not m4_defun'd configure.in:36: warning: _AC_Header_ind_h is m4_require'd but not m4_defun'd configure.in:36: warning: _AC_Header_wins_h is m4_require'd but not m4_defun'd configure:15234: error: possibly undefined macro: _AC_Header_i_i_h If this token and others are legitimate, please use m4_pattern_allow. See the Autoconf documentation. configure:15235: error: possibly undefined macro: _AC_Header_sys__h configure:15236: error: possibly undefined macro: _AC_Header_ind_h configure:15237: error: possibly undefined macro: _AC_Header_wins_h