This is the mail archive of the
cygwin
mailing list for the Cygwin project.
Re: Inefficient use of 64-bit addresses in Clang
It's a difference in memory model.
clang 6.0.0 under ubuntu with --target=x86_64-pc-cygwin gives relative
addresses, unless you specify -mcmodel=large.
Cygwin clang with -mcmodel=small does the right thing: use relative
addresses.
The -mcmodel=small option appears to work differently for Linux and for
Windows targets. I cannot find any documentation of this difference. See:
https://bugs.llvm.org/show_bug.cgi?id=42983
On 12/08/2019 11.45, falk.tannhauser@free.fr wrote:
References: <578eb489-9391-9009-82ad-676eeb4c1c92@agner.org>
In-Reply-To: <578eb489-9391-9009-82ad-676eeb4c1c92@agner.org>
Could the different behaviour between Cygwin and Linux simply be due to different Clang versions?
The current version under Cygwin is 5.0.1, while the latest version available under Linux
appears to be 8.0.1 .
Falk
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple