Successful build of GCC 4.2.0 RC3 on latest Cygwin snapshot 20070427

[Aaron W. LaFramboise]

Aaron Gray wrote:

>> One issue that might affect many some is that COM doesn't work. 
>> <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27067> has a patch that 
>> is pending review I guess, but probably won't go into 4.2.

> Does this effect XPCOM meaning Mozilla and friends will not compile ?

It is triggered anywhere multiple inheritance is combined with stdcall. 
  Since I believe XPCOM uses stdcall on Windows (but "cdecl" on other 
targets), I believe the answer here is 'Yes, Mozilla will not compile.'

I think it's likely that mingw.org will include this fix in their own 
releases of 4.2, which is probably a bad thing, as it makes the need to 
get this fix into official GCC sources seem less urgent.  A lot of GCC 
patches for Windows-related issues tend to stall for a long time in this 
state; I'm not really sure why.

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