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bug#29183: 27.0.50; SIGSEGV on C-g on Windows

From: John Mastro
Subject: bug#29183: 27.0.50; SIGSEGV on C-g on Windows
Date: Wed, 8 Nov 2017 10:35:06 -0800

Eli Zaretskii <address@hidden> wrote:
>> > Can you show a preprocessed version of thread.c, where it does this:
>> >
>> >   static struct thread_state GCALIGNED main_thread;
>> What's the right invocation to get that?
> You need to display it first.  Like this:
>  $ cd src
>  $ make thread.o -W thread.c V=1
> This will compile thread.c and show the full command it uses to do
> that.  Copy-paste that command at the shell prompt, but this time
> replace -c (or add if -c is not there) with -E, and also add
> "-o thread.ii" to the command line.  Then hit Enter.  The file
> thread.ii will have the preprocessed source.

Ah, thanks. After preprocessing, that line becomes:

static struct thread_state __attribute__ ((aligned (8))) main_thread;

>> $ gcc --version
>> gcc.exe (Rev1, Built by MSYS2 project) 7.2.0
> Should be okay, I think.  Does the problem go away if you remove
> GCALIGNED from that line in thread.c and rebuild?

Yep, the SIGSEGV is gone if I remove GCALIGNED from that line.



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