166 lines
4.6 KiB
Plaintext
166 lines
4.6 KiB
Plaintext
# m4/ax_func_which_gethostbyname_r.m4
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# Copyright © 2005 Caolan McNamara <caolan@skynet.ie>
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# Copyright © 2005 Daniel Richard G. <skunk@iskunk.org>
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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# As a special exception, the respective Autoconf Macro's copyright
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# owner gives unlimited permission to copy, distribute and modify the
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# configure scripts that are the output of Autoconf when processing
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# the Macro. You need not follow the terms of the GNU General Public
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# License when using or distributing such scripts, even though
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# portions of the text of the Macro appear in them. The GNU General
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# Public License (GPL) does govern all other use of the material that
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# constitutes the Autoconf Macro.
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# This special exception to the GPL applies to versions of the
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# Autoconf Macro released by the Autoconf Macro Archive. When you make
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# and distribute a modified version of the Autoconf Macro, you may
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# extend this special exception to the GPL to apply to your modified
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# version as well.
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AC_DEFUN([AX_FUNC_WHICH_GETHOSTBYNAME_R], [
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AC_LANG_PUSH(C)
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AC_MSG_CHECKING([how many arguments gethostbyname_r() takes])
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AC_CACHE_VAL(ac_cv_func_which_gethostbyname_r, [
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################################################################
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ac_cv_func_which_gethostbyname_r=unknown
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#
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# ONE ARGUMENT (sanity check)
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#
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# This should fail, as there is no variant of gethostbyname_r() that takes
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# a single argument. If it actually compiles, then we can assume that
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# netdb.h is not declaring the function, and the compiler is thereby
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# assuming an implicit prototype. In which case, we're out of luck.
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#
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([
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AC_LANG_PROGRAM(
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[[#include <netdb.h>]],
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[[
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char *name = "www.gnu.org";
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(void)gethostbyname_r(name) /* ; */
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]])])],
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ac_cv_func_which_gethostbyname_r=no)
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#
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# SIX ARGUMENTS
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# (e.g. Linux)
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#
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if test "$ac_cv_func_which_gethostbyname_r" = "unknown"; then
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([
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AC_LANG_PROGRAM(
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[[#include <netdb.h>]],
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[[
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char *name = "www.gnu.org";
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struct hostent ret, *retp;
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char buf@<:@1024@:>@;
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int buflen = 1024;
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int my_h_errno;
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(void)gethostbyname_r(name, &ret, buf, buflen, &retp, &my_h_errno) /* ; */
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]])])],
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ac_cv_func_which_gethostbyname_r=six)
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fi
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#
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# FIVE ARGUMENTS
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# (e.g. Solaris)
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#
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if test "$ac_cv_func_which_gethostbyname_r" = "unknown"; then
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([
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AC_LANG_PROGRAM(
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[[#include <netdb.h>]],
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[[
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char *name = "www.gnu.org";
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struct hostent ret;
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char buf@<:@1024@:>@;
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int buflen = 1024;
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int my_h_errno;
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(void)gethostbyname_r(name, &ret, buf, buflen, &my_h_errno) /* ; */
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]])])],
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ac_cv_func_which_gethostbyname_r=five)
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fi
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#
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# THREE ARGUMENTS
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# (e.g. AIX, HP-UX, Tru64)
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#
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if test "$ac_cv_func_which_gethostbyname_r" = "unknown"; then
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([
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AC_LANG_PROGRAM(
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[[#include <netdb.h>]],
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[[
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char *name = "www.gnu.org";
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struct hostent ret;
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struct hostent_data data;
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(void)gethostbyname_r(name, &ret, &data) /* ; */
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]])])],
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ac_cv_func_which_gethostbyname_r=three)
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fi
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################################################################
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]) dnl end AC_CACHE_VAL
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case "$ac_cv_func_which_gethostbyname_r" in
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three)
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AC_MSG_RESULT([three])
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AC_DEFINE([HAVE_FUNC_GETHOSTBYNAME_R_3], 1, [three-argument gethostbyname_r])
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;;
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five)
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AC_MSG_RESULT([five])
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AC_DEFINE([HAVE_FUNC_GETHOSTBYNAME_R_5], 1, [five-argument gethostbyname_r])
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;;
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six)
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AC_MSG_RESULT([six])
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AC_DEFINE([HAVE_FUNC_GETHOSTBYNAME_R_6], 1, [six-argument gethostbyname_r])
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;;
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no)
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AC_MSG_RESULT([cannot find function declaration in netdb.h])
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;;
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unknown)
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AC_MSG_RESULT([can't tell])
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;;
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*)
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AC_MSG_ERROR([internal error])
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;;
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esac
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AC_LANG_POP(C)
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]) dnl end AC_DEFUN
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