I know Mike and William are working on the Cygwin port now (perhaps others are
too).
I believe the initial port is going to be 32-bit, which is all I belive Cygwin
supports now. It is certainly not beyond the bounds of possibility that a 64-bit
version of Cygwin becomes available.
So I would consider the implication of your changes if SAGE64 is set to "yes".
Micheal originally only allowed that environment variable to work on OS X, which
was a bit stupid, considering he was paid to work on the Solaris port, and
Solaris needs that option too! Virtually all packages in Sage should now add
-m64 as a compiler flag if SAGE64 is set to yes.
I would consider that while making patches for Cygwin. I can assure you, there
is nothing more boring than going around making changes to permit a 64-bit
build, when with foresight you could have avoided the hassle.
Dave
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