Imported Upstream version 2.5.2p1

[debian/amanda] / config / gnulib / socklen.m4

diff --git a/config/gnulib/socklen.m4 b/config/gnulib/socklen.m4
new file mode 100644 (file)
index 0000000..5e3765a
--- /dev/null
+++ b/config/gnulib/socklen.m4
@@ -0,0 +1,52 @@
+# socklen.m4 serial 4
+dnl Copyright (C) 2005, 2006 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.
+
+dnl From Albert Chin, Windows fixes from Simon Josefsson.
+
+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.
+
+dnl On mingw32, socklen_t is in ws2tcpip.h ('int'), so we try to find
+dnl it there first.  That file is included by gnulib's socket_.h, which
+dnl all users of this module should include.  Cygwin must not include
+dnl ws2tcpip.h.
+AC_DEFUN([gl_TYPE_SOCKLEN_T],
+  [AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl
+   AC_CHECK_TYPE([socklen_t], ,
+     [AC_MSG_CHECKING([for socklen_t equivalent])
+      AC_CACHE_VAL([gl_cv_gl_cv_socklen_t_equiv],
+       [# Systems have either "struct sockaddr *" or
+        # "void *" as the second argument to getpeername
+        gl_cv_socklen_t_equiv=
+        for arg2 in "struct sockaddr" void; do
+          for t in int size_t "unsigned int" "long int" "unsigned long int"; do
+            AC_TRY_COMPILE(
+              [#include <sys/types.h>
+               #include <sys/socket.h>
+
+               int getpeername (int, $arg2 *, $t *);],
+              [$t len;
+               getpeername (0, 0, &len);],
+              [gl_cv_socklen_t_equiv="$t"])
+            test "$gl_cv_socklen_t_equiv" != "" && break
+          done
+          test "$gl_cv_socklen_t_equiv" != "" && break
+        done
+      ])
+      if test "$gl_cv_socklen_t_equiv" = ""; then
+       AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
+      fi
+      AC_MSG_RESULT([$gl_cv_socklen_t_equiv])
+      AC_DEFINE_UNQUOTED([socklen_t], [$gl_cv_socklen_t_equiv],
+       [type to use in place of socklen_t if not defined])],
+     [#include <sys/types.h>
+      #if HAVE_SYS_SOCKET_H
+      # include <sys/socket.h>
+      #elif HAVE_WS2TCPIP_H
+      # include <ws2tcpip.h>
+      #endif])])