m4/hostent.m4

   1 # hostent.m4 serial 2
   2 dnl Copyright (C) 2008, 2010-2014 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 AC_DEFUN([gl_HOSTENT],
   8 [
   9   dnl Where are gethostent(), sethostent(), endhostent(), gethostbyname(),
  10   dnl gethostbyaddr() defined?
  11   dnl - On Solaris, they are in libnsl. Ignore libxnet.
  12   dnl - On Haiku, they are in libnetwork.
  13   dnl - On BeOS, they are in libnet.
  14   dnl - On native Windows, they are in ws2_32.dll.
  15   dnl - Otherwise they are in libc.
  16   AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
  17   HOSTENT_LIB=
  18   gl_saved_libs="$LIBS"
  19   AC_SEARCH_LIBS([gethostbyname], [nsl network net],
  20     [if test "$ac_cv_search_gethostbyname" != "none required"; then
  21        HOSTENT_LIB="$ac_cv_search_gethostbyname"
  22      fi])
  23   LIBS="$gl_saved_libs"
  24   if test -z "$HOSTENT_LIB"; then
  25     AC_CHECK_FUNCS([gethostbyname], , [
  26       AC_CACHE_CHECK([for gethostbyname in winsock2.h and -lws2_32],
  27         [gl_cv_w32_gethostbyname],
  28         [gl_cv_w32_gethostbyname=no
  29          gl_save_LIBS="$LIBS"
  30          LIBS="$LIBS -lws2_32"
  31          AC_LINK_IFELSE(
  32            [AC_LANG_PROGRAM(
  33               [[
  34 #ifdef HAVE_WINSOCK2_H
  35 #include <winsock2.h>
  36 #endif
  37 #include <stddef.h>
  38               ]],
  39               [[gethostbyname(NULL);]])],
  40            [gl_cv_w32_gethostbyname=yes])
  41          LIBS="$gl_save_LIBS"
  42         ])
  43       if test "$gl_cv_w32_gethostbyname" = "yes"; then
  44         HOSTENT_LIB="-lws2_32"
  45       fi
  46     ])
  47   fi
  48   AC_SUBST([HOSTENT_LIB])
  49 ])