Re: Emacs 24.0.90 Pretest Windows Binaries

[Eli Zaretskii]

> Date: Fri, 21 Oct 2011 09:44:23 +0800
> From: Kevin Yu <address@hidden>
> Cc: address@hidden
> 
> I wonder if it's a bug of mingw-gcc 4.6.1

This thread:

  http://lists.gnu.org/archive/html/qemu-devel/2011-10/msg01697.html

suggests that it probably is.  IIUC, there's an issue with setjmp in
the MS runtime not working when -fomit-frame-pointer is used, and the
MinGW GCC 4.6.1 turns on -fomit-frame-pointer by default when
optimizing.  Since Emacs uses setjmp/longjmp _a_lot_, and in
particular C-g throws to the top level via this mechanism, it seems
like we have a smoking gun.

Perhaps rebuild Emacs with -fno-omit-frame-pointer, and see if that
helps.