Re: Building tools on unsupported cpu/arch

[Thomas Huth <thuth@redhat.com>]

On 30/04/2022 16.11, Michael Tokarev wrote:
> Hello!
> 
> Previously, it was possible to build qemu tools (such as qemu-img, or qemu-ga)
> on an unsupported cpu/architecture.  In a hackish way, by specifying
> --enable-tcg-interpreter on the ./configure line.
> 
> Today (with 7.0), it does not work anymore, with the following error
> during configure:
> 
>   common-user/meson.build:1:0: ERROR: Include dir host/unknown does not exist.

Did you ever send a patch for this? I something like this should do the job:

diff a/common-user/meson.build b/common-user/meson.build
--- a/common-user/meson.build
+++ b/common-user/meson.build
@@ -1,3 +1,7 @@
+if not have_user
+   subdir_done()
+endif
+
  common_user_inc += include_directories('host/' / host_arch)

  user_ss.add(files(


> This is with --disable-system --disable-linux-user --disable-user.
> 
> And without --enable-tcg-interpreter, it gives:
> 
>   meson.build:390:6: ERROR: Problem encountered: Unsupported CPU m68k, try 
> --enable-tcg-interpreter
> 
> What's the way to build tools on an unsupported architecture these days?

You could try to use --disable-tcg instead of --enable-tcg-interpreter ... 
but I guess we should improve the logic in configure / meson.build a little 
bit to do that automatically...

I guess Philippe's patch from February should do the job:

  https://lists.gnu.org/archive/html/qemu-devel/2022-02/msg00894.html

Philippe, could you maybe respin that series?

  Thomas