[llvm] [Cygwin] Cygwin cmodel medium for 64 bit (PR #74931)

[徐持恒 Xu Chiheng via llvm-commits]

xu-chiheng wrote:

> This lacks tests and proper description

Cygwin 64 bit must use cmodel medium. Other wise Clang can't bootstrap.

I have build scripts and patches at https://github.com/xu-chiheng/Note

Cygwin also have outdated patches at :
https://cygwin.com/git-cygwin-packages/
https://cygwin.com/git-cygwin-packages/?p=git/cygwin-packages/clang.git;a=summary
git://cygwin.com/git/cygwin-packages/clang.git
https://cygwin.com/git-cygwin-packages/?p=git/cygwin-packages/llvm.git;a=summary
git://cygwin.com/git/cygwin-packages/llvm.git




https://github.com/llvm/llvm-project/pull/74931