[Live-devel] Compilation failure on cygwin (live-2007.01.11.tar.gz)

[Ross Finlayson]

This appears to be a problem with the header files distributed 
with/for Cygwin.  It does not make sense for 
"IP_ADD_SOURCE_MEMBERSHIP" to be defined in the header files without 
"struct ip_mreq_source" also being defined in the header files - 
because that struct is intended to be used with the 
IP_ADD_SOURCE_MEMBERSHIP ioctl().

For every other environment that I'm aware of, either 
"IP_ADD_SOURCE_MEMBERSHIP" and "struct ip_mreq_source" are both 
defined in the header files, or neither of them are.

Unfortunately, it's not possible to use the C/C++ preprocessor to do 
something like
	#ifndef struct ip_mreq_source
so I can't modify the distributed code so that it will compile for 
both your Cygwin environment, and for every other environment out 
there (unless there's a Cygwin-specific compile-time #define that I 
can check?)

The right solution is to fix the Cygwin distribution so that its 
header files define both "IP_ADD_SOURCE_MEMBERSHIP" and "struct 
ip_mreq_source" (or neither).
-- 

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/