Re: [PATCH 4/4] qapi/meson: Restrict machine-specific objects to sysemu

[Paolo Bonzini <pbonzini@redhat.com>]

On 2/4/22 16:29, Philippe Mathieu-Daudé via wrote:
> machine/ and net/ are only useful to machines;
> block/ and migration/ to machine or tools.
> 
> Note we need to keep building machine.json generated sources
> on all targets because some want to access X86CPUFeatureWordInfo
> from any architecture ¯\_(ツ)_/¯ Otherwise we get on all but
> x86 targets:
> 
>    /usr/bin/ld: libqemu-i386-linux-user.fa.p/target_i386_cpu.c.o: in function `x86_cpu_get_feature_words':
>    ../target/i386/cpu.c:4587: undefined reference to `visit_type_X86CPUFeatureWordInfoList'
>    collect2: error: ld returned 1 exit status

I suppose you mean "on all but x86 hosts", since it links 
libqemu-i386-linux-user.fa.p?  But I don't understand how that happens. 
  Is it related to

{ 'struct': 'DummyForceArrays',
   'data': { 'unused': ['X86CPUFeatureWordInfo'] } }

and if so can DummyForceArrays be moved to machine-target.json together 
with X86CPUFeatureWordInfo, and under 'if': 'TARGET_I386'?

Thanks,

Paolo

> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>   qapi/meson.build | 20 ++++++++++----------
>   1 file changed, 10 insertions(+), 10 deletions(-)
> 
> diff --git a/qapi/meson.build b/qapi/meson.build
> index 656ef0e039..38b01f3083 100644
> --- a/qapi/meson.build
> +++ b/qapi/meson.build
> @@ -23,10 +23,6 @@ endif
>   
>   qapi_all_modules = [
>     'authz',
> -  'block',
> -  'block-core',
> -  'block-export',
> -  'char',
>     'common',
>     'compat',
>     'control',
> @@ -35,26 +31,23 @@ qapi_all_modules = [
>     'error',
>     'introspect',
>     'job',
> -  'machine',
> -  'machine-target',
> +  'machine', # x86 is considered multiarch by some
>     'migration',
>     'misc',
>     'misc-target',
> -  'net',
>     'pragma',
> -  'qom',
>     'replay',
>     'run-state',
>     'sockets',
>     'trace',
> -  'transaction',
> -  'yank',
>   ]
>   if have_system
>     qapi_all_modules += [
>       'acpi',
>       'audio',
>       'qdev',
> +    'machine-target',
> +    'net',
>       'pci',
>       'rdma',
>       'rocker',
> @@ -63,7 +56,14 @@ if have_system
>   endif
>   if have_system or have_tools
>     qapi_all_modules += [
> +    'block',
> +    'block-core',
> +    'block-export',
> +    'char',
> +    'qom',
>       'ui',
> +    'transaction',
> +    'yank',
>     ]
>   endif
>