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64 bit HEADSUP: Restart of *everything* today
- From: Corinna Vinschen <corinna-cygwin at cygwin dot com>
- To: cygwin-developers at cygwin dot com
- Date: Tue, 5 Mar 2013 15:30:07 +0100
- Subject: 64 bit HEADSUP: Restart of *everything* today
- Reply-to: cygwin-developers at cygwin dot com
Hi guys,
good news: Kai finished his first cut (pre-cleanup, pre-code comments)
version of his medium/large code model patch. I already generated a
complete new toolchain and it looks pretty good. The default code model
for Cygwin applications is "medium". This means, external code is
referenced as usual, external data is referenced via a (pseudo-)GOT
table similar to ELF files.
This raises the code size marginally (about 3 to 5%), but it allows to
access external variables in the entire 64 bit address range without the
requirement to declare these symbols as dllimport symbols.
While I was at it, I changed Cygwin so that "environ" is now a simple
external variable. The 32 bit code is rather convoluted, probably
because the original implementers couldn't export simple variables
way back when.
You're asking for the dowside? Here's the downside:
Our entire micro distro in ftp://cygwin.com/pub/cygwin/64bit/install
is for the birds. Almost no application will run anymore, unless it
gets rebuilt from scratch with the new toolchain.
Therefore I moved everything to ftp://cygwin.com/pub/cygwin/64bit/OLD
for now. I will upload new toolchains, dash, tcsh, coreutils etc. during
this week, parts of it already today, so we can build more packages
from scratch ASAP.
Ok, that's all folks,
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat