bug#70914: 29.3; Crashes often on Windows

[Simen Endsjø]

--with-native-compilation=no still crashed, but with `bool no_native = true;` in
addition, I haven't been able to trigger any errors.

I cannot even build --with-native-compilation=aot as compiling several packages
segfaults too.

So it definitely looks related to native compilation.

On Thu, May 16, 2024 at 9:29 PM Eli Zaretskii <eliz@gnu.org> wrote:
>
> > From: Simen Endsjø <simendsjo@gmail.com>
> > Date: Thu, 16 May 2024 20:40:07 +0200
> > Cc: Eli Zaretskii <eliz@gnu.org>, 70914@debbugs.gnu.org
> >
> > > But I guess is not an option here if one can't recompile.
> >
> > I'm not blocked from compiling code on the machine, but I guess there's
> > something wrong with my setup, because the instructions in nt/INSTALL.W64
> > doesn't seem to work out of the box.
> >
> > Tried to start with a baseline by looking at
> > system-configuration-options of the stock install and configured with:
> >     ./configure
> > --prefix=/d/tmp/emacs-bug-70914/emacs-29.3-stock-options
> > --with-modules --without-dbus --with-native-compilation=aot
> > --without-compress-install --with-sqlite3 --with-tree-sitter
> > CFLAGS=-O2
> >
> > But when building, I get an error:
> >     make -C src BIN_DESTDIR=''/mingw64/bin/'' \
> >              ELN_DESTDIR='/mingw64/lib/emacs/29.3/' all
> >     make[2]: Entering directory '/d/tmp/emacs-bug-70914/emacs-git/src'
> >       CC       sysdep.o
> >     sysdep.c: In function 'get_child_status':
> >     sysdep.c:472:13: error: implicit declaration of function 'waitpid'
> > [-Wimplicit-function-declaration]
> >       472 |       pid = waitpid (child, status, options);
> >       |             ^~~~~~~
> >     sysdep.c:472:13: warning: nested extern declaration of 'waitpid'
> > [-Wnested-externs]
> >     sysdep.c: In function 'child_status_changed':
> >     sysdep.c:518:43: error: 'WNOHANG' undeclared (first use in this 
> > function)
> >       518 |   return get_child_status (child, status, WNOHANG | options, 0);
> >       |                                           ^~~~~~~
> >     sysdep.c:518:43: note: each undeclared identifier is reported only
> > once for each function it appears in
> >     sysdep.c:519:1: warning: control reaches end of non-void function
> > [-Wreturn-type]
> >       519 | }
> >       | ^
> >     make[2]: *** [Makefile:424: sysdep.o] Error 1
> >     make[2]: Leaving directory '/d/tmp/emacs-bug-70914/emacs-git/src'
> >     make[1]: *** [Makefile:544: src] Error 2
>
> I guess you are using GCC 14, in which case see bug#70889 for the
> reasons and the workaround.
>
> It would be interesting to know whether Emacs without native
> compilation crashes in the same way.