2007-04-12 Christian Thalinger <twisti@complang.tuwien.ac.at>

        * LICENSE: Added m4/ax_func_which_gethostbyname_r.m4 license.
        * configure.ac: Added AX_FUNC_WHICH_GETHOSTBYNAME_R check.
        * m4/ax_func_which_gethostbyname_r.m4: New file.
        * native/jni/native-lib/cpnet.c (cpnet_getHostByName): Check for
        different number of arguments of gethostbyname_r.

1 files changed, 165 insertions, 0 deletions

diff --git a/m4/ax_func_which_gethostbyname_r.m4 b/m4/ax_func_which_gethostbyname_r.m4
new file mode 100644
index 000000000..d1811efe3
--- /dev/null
+++ b/m4/ax_func_which_gethostbyname_r.m4
@@ -0,0 +1,165 @@
+# m4/ax_func_which_gethostbyname_r.m4
+
+# Copyright © 2005 Caolan McNamara <caolan@skynet.ie>
+# Copyright © 2005 Daniel Richard G. <skunk@iskunk.org>
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+# 02111-1307, USA.
+
+# As a special exception, the respective Autoconf Macro's copyright
+# owner gives unlimited permission to copy, distribute and modify the
+# configure scripts that are the output of Autoconf when processing
+# the Macro. You need not follow the terms of the GNU General Public
+# License when using or distributing such scripts, even though
+# portions of the text of the Macro appear in them. The GNU General
+# Public License (GPL) does govern all other use of the material that
+# constitutes the Autoconf Macro.
+
+# This special exception to the GPL applies to versions of the
+# Autoconf Macro released by the Autoconf Macro Archive. When you make
+# and distribute a modified version of the Autoconf Macro, you may
+# extend this special exception to the GPL to apply to your modified
+# version as well.
+
+
+AC_DEFUN([AX_FUNC_WHICH_GETHOSTBYNAME_R], [
+
+    AC_LANG_PUSH(C)
+    AC_MSG_CHECKING([how many arguments gethostbyname_r() takes])
+
+    AC_CACHE_VAL(ac_cv_func_which_gethostbyname_r, [
+
+################################################################
+
+ac_cv_func_which_gethostbyname_r=unknown
+
+#
+# ONE ARGUMENT (sanity check)
+#
+
+# This should fail, as there is no variant of gethostbyname_r() that takes
+# a single argument. If it actually compiles, then we can assume that
+# netdb.h is not declaring the function, and the compiler is thereby
+# assuming an implicit prototype. In which case, we're out of luck.
+#
+AC_COMPILE_IFELSE(
+    AC_LANG_PROGRAM(
+        [[#include <netdb.h>]],
+        [[
+            char *name = "www.gnu.org";
+            (void)gethostbyname_r(name) /* ; */
+        ]]),
+    ac_cv_func_which_gethostbyname_r=no)
+
+#
+# SIX ARGUMENTS
+# (e.g. Linux)
+#
+
+if test "$ac_cv_func_which_gethostbyname_r" = "unknown"; then
+
+AC_COMPILE_IFELSE(
+    AC_LANG_PROGRAM(
+        [[#include <netdb.h>]],
+        [[
+            char *name = "www.gnu.org";
+            struct hostent ret, *retp;
+            char buf@<:@1024@:>@;
+            int buflen = 1024;
+            int my_h_errno;
+            (void)gethostbyname_r(name, &ret, buf, buflen, &retp, &my_h_errno) /* ; */
+        ]]),
+    ac_cv_func_which_gethostbyname_r=six)
+
+fi
+
+#
+# FIVE ARGUMENTS
+# (e.g. Solaris)
+#
+
+if test "$ac_cv_func_which_gethostbyname_r" = "unknown"; then
+
+AC_COMPILE_IFELSE(
+    AC_LANG_PROGRAM(
+        [[#include <netdb.h>]],
+        [[
+            char *name = "www.gnu.org";
+            struct hostent ret;
+            char buf@<:@1024@:>@;
+            int buflen = 1024;
+            int my_h_errno;
+            (void)gethostbyname_r(name, &ret, buf, buflen, &my_h_errno) /* ; */
+        ]]),
+    ac_cv_func_which_gethostbyname_r=five)
+
+fi
+
+#
+# THREE ARGUMENTS
+# (e.g. AIX, HP-UX, Tru64)
+#
+
+if test "$ac_cv_func_which_gethostbyname_r" = "unknown"; then
+
+AC_COMPILE_IFELSE(
+    AC_LANG_PROGRAM(
+        [[#include <netdb.h>]],
+        [[
+            char *name = "www.gnu.org";
+            struct hostent ret;
+            struct hostent_data data;
+            (void)gethostbyname_r(name, &ret, &data) /* ; */
+        ]]),
+    ac_cv_func_which_gethostbyname_r=three)
+
+fi
+
+################################################################
+
+]) dnl end AC_CACHE_VAL
+
+case "$ac_cv_func_which_gethostbyname_r" in
+    three)
+    AC_MSG_RESULT([three])
+    AC_DEFINE([HAVE_FUNC_GETHOSTBYNAME_R_3], 1, [three-argument gethostbyname_r])
+    ;;
+
+    five)
+    AC_MSG_RESULT([five])
+    AC_DEFINE([HAVE_FUNC_GETHOSTBYNAME_R_5], 1, [five-argument gethostbyname_r])
+    ;;
+
+    six)
+    AC_MSG_RESULT([six])
+    AC_DEFINE([HAVE_FUNC_GETHOSTBYNAME_R_6], 1, [six-argument gethostbyname_r])
+    ;;
+
+    no)
+    AC_MSG_RESULT([cannot find function declaration in netdb.h])
+    ;;
+
+    unknown)
+    AC_MSG_RESULT([can't tell])
+    ;;
+
+    *)
+    AC_MSG_ERROR([internal error])
+    ;;
+esac
+
+AC_LANG_POP(C)
+
+]) dnl end AC_DEFUN