# sys_select_h.m4 serial 3 dnl Copyright (C) 2006-2007 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_HEADER_SYS_SELECT], [ AC_CACHE_CHECK([whether is self-contained], [gl_cv_header_sys_select_h_selfcontained], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include ], [])], [gl_cv_header_sys_select_h_selfcontained=yes], [gl_cv_header_sys_select_h_selfcontained=no]) ]) if test $gl_cv_header_sys_select_h_selfcontained = yes; then SYS_SELECT_H='' else SYS_SELECT_H='sys/select.h' gl_CHECK_NEXT_HEADERS([sys/select.h]) if test $ac_cv_header_sys_select_h = yes; then HAVE_SYS_SELECT_H=1 else HAVE_SYS_SELECT_H=0 fi AC_SUBST([HAVE_SYS_SELECT_H]) fi AC_SUBST([SYS_SELECT_H]) ])