Re: [Qemu-devel] [PATCH] w32: Undefine error constants before their redefinition

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2012-03-29 20:02, Stefan Weil wrote:
> Am 28.03.2012 20:56, schrieb Jan Kiszka:
>> Avoids lots of warnings.
>>
>> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
>> ---
>> qemu_socket.h | 2 ++
>> 1 files changed, 2 insertions(+), 0 deletions(-)
>>
>> diff --git a/qemu_socket.h b/qemu_socket.h
>> index fe4cf6c..51ad210 100644
>> --- a/qemu_socket.h
>> +++ b/qemu_socket.h
>> @@ -8,7 +8,9 @@
>> #include <ws2tcpip.h>
>>
>> #define socket_error() WSAGetLastError()
>> +#undef EWOULDBLOCK
>> #undef EINTR
>> +#undef EINPROGRESS
>> #define EWOULDBLOCK WSAEWOULDBLOCK
>> #define EINTR WSAEINTR
>> #define EINPROGRESS WSAEINPROGRESS
> 
> Hi,
> 
> I am curious: with which version of MinGW or Cygwin do you get warnings?
> I don't see them in my native and cross MinGW / MinGW-w64 builds.

Not sure if that is what you are looking for, but my runtime rpm claims
to be mingw32-runtime-20120126-1.4.

> 
> Where do the original definitions come from, and are they compatible with
> the redefined values? If yes, it might be possible to put the new 
> definitions
> in a conditionally compiled code block (#if !defined(EWOULDBLOCK) ... 
> #endif).

/usr/i686-w64-mingw32/sys-root/mingw/include/errno.h:158:0: note: this
is the location of the previous definition

And there we have e.g.

#ifndef EINPROGRESS
#define EINPROGRESS 112
#endif

vs.

#define WSAEINPROGRESS 10036L

> 
> Could slirp/slirp.h also use qemu_socket.h? That would simplify the code.
> Is it possible to move those definitions to qemu-os-win32.h? I'd prefer
> to have them in some w32 specific header file instead of qemu_socket.h and
> slirp/slirp.h.

/me too. But as I cannot test w32, I would welcome to receive a tested
patch for the slirp queue. :)

Jan

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