Re: [Discuss-gnuradio] Error installing wxPython on CYGWIN in Windows XP

[Don Ward]

Shabbir Ahmed wrote:

> i. Down to business I am having errors in installing wxPython on CYGWIN in
> Windows XP.
>
> ii. Have been referring to
> http://gnuradio.org/redmine/wiki/gnuradio/WxPythonCygwin for installation
> guide.
>
> iii. In the above, Steps 1, 2, 3, 4 and 4a works like a charm, I am still
> attaching the output files in case you need to refer to them.
>
> iv. In Steps 5 i get the following warnings and error:
>
> In file included from ../src/msw/utils.cpp:56:
> /usr/lib/gcc/i686-pc-cygwin/4.3.4/../../../../include/w32api/winsock.h:479:
> error: declaration of C function ‘int select(int, _types_fd_set*,
> _types_fd_set*, _types_fd_set*, const timeval*)’ conflicts with
> /usr/include/sys/select.h:31: error: previous declaration ‘int 
> select(int,
> _types_fd_set*, _types_fd_set*, _types_fd_set*, timeval*)’ here

As Bob McGwier reported to the list on 3 Jan, there has been a major update 
to Cygwin, including a switch to gcc 4.3.4.  I don't know if anyone has 
tried to install GNU Radio with the new version and I know that the 
instructions in the wiki have not been updated for the the new version.

The immediate problem is that both winsock.h and select.h have been 
included, leading to a conflict.  You may be able to avoid this by editing 
build-local/lib/wx/include/msw-ansi-release-2.8/wx/setup.h so that 
HAVE_SYS_SELECT_H is undefined.  Of course this might just be the first of 
many such errors that are not easily fixed.

Another possibility is that another include file in gcc 4.3.4 is including 
select.h.  If that is the case, we will need to see what can be done.

It should be noted that the latest Cygwin FAQ states you can't use winsock 
functions in Cygwin (even though the winsock.h header file is included in 
the distribution).  So they may have changed it so it just won't work.

Checking out the new Cygwin is on my list of things to do, but it probably 
won't happen soon.

Please let us know what you find.

-- Don W.