Re: (Windows) Problems with processes on master branch

[Óscar Fuentes]

Arash Esbati <arash@gnu.org> writes:

> With my Emacs 30 (d0766c0999) build, started from cmd.exe with
> 'runemacs -Q' and M-x shell RET, I get:
>
> Microsoft Windows [Version 10.0.19045.4046]
> (c) Microsoft Corporation. Alle Rechte vorbehalten.
>
> z:dir\>gcc -v
> gcc -v
> Using built-in specs.
> ...
>
>
> With 'emacs -Q' started from a MinGW64 shell, M-x shell RET says:
>
> bash: cannot set terminal process group (-1): Inappropriate ioctl for device
> bash: no job control in this shell
>
> $ gcc -v
> Using built-in specs.
> ...
>
> Both versions work, despite the bash message.  I didn't try eshell.

Thanks Arash and Corwin.

The problem is caused by MSYS2 makepkg-mingw (the MSYS2 binary package
builder) which adds

-D_FORTIFY_SOURCE

to CFLAGS. In fact, the MSYS2/Mingw-packages recipe for emacs-29
contains:

  # -D_FORTIFY_SOURCE breaks build
  CFLAGS=${CFLAGS//"-Wp,-D_FORTIFY_SOURCE=2"}
  # -foptimize-sibling-calls breaks native compilation (GCC 13.1)
  CFLAGS+=" -fno-optimize-sibling-calls"

Once that is added to my recipe, the problem goes away.