[Libvir] [PATCH] A few more Windows / MinGW fixups

[Richard W.M. Jones]

A few fairly miscellaneous fixups for Windows (MinGW) which fix shared 
library builds and fix error handling for sockets.

(1) XDR functions on MinGW come from a library called 'libxdr', not 
'librpc'.

(2) To build a DLL under MinGW we need to pass the -no-undefined flag to 
the linker.

(3) Socket compatibility header file replaces <winsock2.h> inclusion. 
This just defines a portable 'socket_errno()' function which returns 
errno in the normal case, or WSAGetLastError() in the Windows case.

(4) Use socket_errno() instead of errno in a few cases (but only when 
the code can be compiled under Windows, ie. only in the remote client case).

Example -- a dynamically linked virsh.exe (linked to libvirt-0.dll) 
accessing a remote libvirtd:

$ src/.libs/virsh.exe -c test+tcp://192.168.2.128/default list
  Id Name                 State
----------------------------------
   1 test                 running

If you want to compile this under Windows, you will need:

(a) MinGW & MSYS (select the "candidate" versions of MinGW tools if you 
are using Vista or W2K8, since otherwise nothing works because of a 
known bug).

(b) Install gcc 4 experimental package from MinGW site.  It's called 
gcc-sjlj for reasons which escape me.

(c) Install GnuTLS binary from 
http://www.gnu.org/software/gnutls/download.html.  I'm using GnuTLS 
Windows binary 1.6.3 and I had to hand-hack the *.la files in that 
distribution because they contain incorrect paths.

(d) Compile and install latest libxml2 from http://xmlsoft.org/.  I'm 
using 2.6.30.

(e) Compile and install my XDR package for Windows 
(http://www.annexia.org/tmp/xdr-4.0-mingw5.tar.gz)

(f) ./configure --without-xen --without-qemu --without-sasl 
--without-libvirtd

(g) make

Rich.

-- 
Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/
Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod
Street, Windsor, Berkshire, SL4 1TE, United Kingdom.  Registered in
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