RE: [Gnu-arch-users] Arch On Cygwin(Win32)

[wlist]

Robert Collins wrote:
> Changing arch may be an approach. Be sure to write home when you've
> reimplemented the entire cygwin file IO layer.

I've been making a few attempts at this myself, bearing in mind your
warnings that it is ugly and won't work. :-)

This is what I've found:

In hackerlab, vu_open() returns a file descriptor. We need a version of
open() that supports long pathnames, but it appears there isn't one in
win32.

So I've updated vu_open() to call CreateFileW() instead. However, this
returns a handle, which can be converted into a file descriptor using
_open_osfhandle().

_open_osfhandle() is in the VC++ RTL. From my (somewhat naive)
experiments, and searching through the Cygwin mailing list archives, it
appears that we can't link both libmsvcrt.a and cygwin.dll. I can build
some test code that successfully returns a working file descriptor by
compiling with -lmsvcrt and -mno-cygwin.

However, I can't build arch with those options (because it needs stuff
from cygwin).

Have you had to tackle a similar problem in Cygwin itself, or is there
some problem with my understanding of the issue?

Your thoughts would be appreciated.

Many thanks
Pat Galea