From 349cfa7acb95abe865209a28e417ec74b56f9bba Mon Sep 17 00:00:00 2001
From: Alberto Gonzalez Iniesta <agi@inittab.org>
Date: Tue, 21 Feb 2012 15:53:40 +0100
Subject: Imported Upstream version 2.2.1

---
 acinclude.m4 | 127 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 acinclude.m4

(limited to 'acinclude.m4')

diff --git a/acinclude.m4 b/acinclude.m4
new file mode 100644
index 0000000..185907f
--- /dev/null
+++ b/acinclude.m4
@@ -0,0 +1,127 @@
+dnl Special Autoconf Macros for OpenVPN
+
+dnl OPENVPN_ADD_LIBS(LIB)
+AC_DEFUN([OPENVPN_ADD_LIBS], [
+  LIBS="$1 $LIBS"
+])
+
+dnl @synopsis AX_EMPTY_ARRAY
+dnl
+dnl Define EMPTY_ARRAY_SIZE to be either "0"
+dnl or "" depending on which syntax the compiler
+dnl prefers for empty arrays in structs.
+dnl
+dnl @version
+dnl @author James Yonan <jim@yonan.net>
+
+
+AC_DEFUN([AX_EMPTY_ARRAY], [
+  AC_MSG_RESULT([checking for C compiler empty array support])
+  AC_COMPILE_IFELSE(
+    [
+        struct { int foo; int bar[[0]]; } mystruct;
+    ], [
+        AC_DEFINE_UNQUOTED(EMPTY_ARRAY_SIZE, 0, [Dimension to use for empty array declaration])
+    ], [
+        AC_COMPILE_IFELSE(
+	    [
+	        struct { int foo; int bar[[]]; } mystruct;
+	    ], [
+                AC_DEFINE_UNQUOTED(EMPTY_ARRAY_SIZE,, [Dimension to use for empty array declaration])
+	    ], [
+	        AC_MSG_ERROR([C compiler is unable to creaty empty arrays])
+	    ])
+    ])
+  ]
+)
+
+dnl @synopsis AX_CPP_VARARG_MACRO_GCC
+dnl
+dnl Test if the preprocessor understands GNU GCC-style vararg macros.
+dnl If it does, defines HAVE_CPP_VARARG_MACRO_GCC to 1.
+dnl
+dnl @version
+dnl @author James Yonan <jim@yonan.net>, Matthias Andree <matthias.andree@web.de>
+AC_DEFUN([AX_CPP_VARARG_MACRO_GCC], [dnl
+    AS_VAR_PUSHDEF([VAR],[ax_cv_cpp_vararg_macro_gcc])dnl
+    AC_CACHE_CHECK([for GNU GCC vararg macro support], VAR, [dnl
+      AC_COMPILE_IFELSE([
+	#define macro(a, b...) func(a, b)
+	int func(int a, int b, int c);
+	int test() { return macro(1, 2, 3); }
+	], [ VAR=yes ], [VAR=no])])
+    if test $VAR = yes ; then
+    AC_DEFINE([HAVE_CPP_VARARG_MACRO_GCC], 1, 
+      [Define to 1 if your compiler supports GNU GCC-style variadic macros])
+    fi
+    AS_VAR_POPDEF([VAR])dnl
+])
+
+dnl @synopsis AX_CPP_VARARG_MACRO_ISO
+dnl
+dnl Test if the preprocessor understands ISO C 1999 vararg macros.
+dnl If it does, defines HAVE_CPP_VARARG_MACRO_ISO to 1.
+dnl
+dnl @version
+dnl @author James Yonan <jim@yonan.net>, Matthias Andree <matthias.andree@web.de>
+AC_DEFUN([AX_CPP_VARARG_MACRO_ISO], [dnl
+    AS_VAR_PUSHDEF([VAR],[ax_cv_cpp_vararg_macro_iso])dnl
+    AC_CACHE_CHECK([for ISO C 1999 vararg macro support], VAR, [dnl
+      AC_COMPILE_IFELSE([
+#define macro(a, ...) func(a, __VA_ARGS__)
+	int func(int a, int b, int c);
+	int test() { return macro(1, 2, 3); }
+	], [ VAR=yes ], [VAR=no])])
+    if test $VAR = yes ; then
+    AC_DEFINE([HAVE_CPP_VARARG_MACRO_ISO], 1, 
+      [Define to 1 if your compiler supports ISO C99 variadic macros])
+    fi
+    AS_VAR_POPDEF([VAR])dnl
+])
+
+dnl -- The following is taken from curl's acinclude.m4 --
+dnl Check for socklen_t: historically on BSD it is an int, and in
+dnl POSIX 1g it is a type of its own, but some platforms use different
+dnl types for the argument to getsockopt, getpeername, etc.  So we
+dnl have to test to find something that will work.
+AC_DEFUN([TYPE_SOCKLEN_T],
+[
+   AC_CHECK_TYPE([socklen_t], ,[
+      AC_MSG_CHECKING([for socklen_t equivalent])
+      AC_CACHE_VAL([curl_cv_socklen_t_equiv],
+      [
+         case "$host" in
+	 *-mingw*) curl_cv_socklen_t_equiv=int ;;
+	 *)
+            # Systems have either "struct sockaddr *" or
+            # "void *" as the second argument to getpeername
+            curl_cv_socklen_t_equiv=
+            for arg2 in "struct sockaddr" void; do
+               for t in int size_t unsigned long "unsigned long"; do
+                  AC_TRY_COMPILE([
+                     #include <sys/types.h>
+                     #include <sys/socket.h>
+
+                     int getpeername (int, $arg2 *, $t *);
+                  ],[
+                     $t len;
+                     getpeername(0,0,&len);
+                  ],[
+                     curl_cv_socklen_t_equiv="$t"
+                     break
+                  ])
+               done
+            done
+	 ;;
+	 esac
+
+         if test "x$curl_cv_socklen_t_equiv" = x; then
+            AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
+         fi
+      ])
+      AC_MSG_RESULT($curl_cv_socklen_t_equiv)
+      AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv,
+			[type to use in place of socklen_t if not defined])],
+      [#include <sys/types.h>
+#include <sys/socket.h>])
+])
-- 
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