[racket] Should Solaris use "poll()"?

I'm glad to hear that we've already fixed problems with v5.2.1 and
Solaris 5.10, but I also think your change is good. I'll merge your
changes if Eli doesn't get to it first.

At Tue, 29 May 2012 16:15:26 +0100, Tim Brown wrote:
> Matthew,
> 
> In kindness to Eli (who's been doing a sterling job running messages from
> me to you), I'll report this to you directly...
> 
> I had an issue building racket-5.2.1 from the UNIX source tar ball with
> Solaris 5.10 and the gcc compiler. I configure with "./configure", no
> further flags.
> 
> I get the following error in port.c:
> ------------------------------------------------------------------------
> gcc -I./.. -I./../include -g -O2  -Wall     -D_LARGEFILE_SOURCE 
> -D_FILE_OFFSET_BITS=64 -c ./port.c -o port.o
> ./port.c: In function `scheme_alloc_global_fdset':
> ./port.c:792: error: invalid application of `sizeof' to incomplete type 
> `mz_fd_set'
> ./port.c: In function `scheme_merge_fd_sets':
> ./port.c:1257: warning: implicit declaration of function `FDSET_LIMIT'
> ./port.c:1259: error: invalid lvalue in assignment
> *** Error code 1
> make: Fatal error: Command failed for target `port.o'
> ------------------------------------------------------------------------
> 
> If I patch the configure script with try_poll_syscall=yes, the build
> succeeds. This is the change that I have made a pull request for on
> github master. However, I made that patch without checking first that
> the master has the problem.
> 
> In fact, I do not have this problem with the github master. Whether or not
> the patch is active. But I haven't cancelled my pull requests.
> 
> Because, although it works I was wondering whether try_poll_syscall=yes
> should be set for Solaris 5.10, since it is a system that supports poll().
> (And I assume that even if there is a version that doesn't support poll(),
> configure would switch the facility off anyway).
> 
> Or is this detected in another way during the build process?
> 
> Regards,
> 
> Tim
> 
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