Re: [PATCH spice-common v2 2/2] meson: Do not build generated files twice

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> 
> Hi,
> 
> On Wed, Apr 03, 2019 at 05:20:36PM +0100, Frediano Ziglio wrote:
> > spice-gtk and spice-server will use spice_common_client_dep
> > and spice_common_server_dep as dependencies.
> > However they will depend on both spice-common client/server
> > libraries and their sources causing the sources to be compiled
> > multiple times and causes linker errors on spice-gtk.
> > The issue can be observed doing a "find -name \*generated\*.o"
> > in Meson build directory.
> > 
> > Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
> > ---
> >  common/meson.build | 10 ++++++++--
> >  1 file changed, 8 insertions(+), 2 deletions(-)
> > 
> > diff --git a/common/meson.build b/common/meson.build
> > index 2b7bef0..9eace62 100644
> > --- a/common/meson.build
> > +++ b/common/meson.build
> > @@ -97,11 +97,13 @@ if spice_common_generate_client_code
> >      'ssl_verify.h',
> >    ]
> >  
> > +  target_headers = []
> >    spice_common_client_sources += common_generated
> >    foreach t : targets
> >      cmd = [python, spice_codegen] + t[3]
> >      target = custom_target(t[0], input : t[1], output : t[2], install :
> >      false, command : cmd,
> >                             depend_files : spice_codegen_files +
> >                             ['client_marshallers.h'])
> > +    target_headers += target[1]
> >      spice_common_client_sources += target
> >    endforeach
> >  
> > @@ -109,7 +111,7 @@ if spice_common_generate_client_code
> >                                             install : false,
> >                                             dependencies :
> >                                             spice_common_dep)
> >  
> > -  spice_common_client_dep = declare_dependency(sources : target,
> > +  spice_common_client_dep = declare_dependency(sources : target_headers,
> >                                                 link_with :
> >                                                 spice_common_client_lib,
> >                                                 dependencies :
> >                                                 spice_common_dep)
> >  endif
> > @@ -153,10 +155,14 @@ if spice_common_generate_server_code
> >  
> >    spice_common_server_sources = []
> >  
> > +  target_headers = []
> >    foreach t : targets
> >      cmd = [python, spice_codegen] + t[3]
> >      target = custom_target(t[0], input : t[1], output : t[2], install :
> >      false, command : cmd,
> >                             depend_files : spice_codegen_files +
> >                             ['messages.h'])
> > +    if t[2].length() > 1
> > +      target_headers += target[1]
> > +    endif
> 
> Why this check?
> 

One of the targets have no header, only a C module on output.
It may seems odd to check t[2] (which is an array) and get
target but each output produce a different entry in target.
I'm not sure if having only one output target will be an
array or not so the check on t[2].

> >      spice_common_server_sources += target
> >    endforeach
> >  
> > @@ -164,7 +170,7 @@ if spice_common_generate_server_code
> >                                             install : false,
> >                                             dependencies :
> >                                             spice_common_dep)
> >  
> > -  spice_common_server_dep = declare_dependency(sources : target,
> > +  spice_common_server_dep = declare_dependency(sources : target_headers,
> >                                                 link_with :
> >                                                 spice_common_server_lib,
> >                                                 dependencies :
> >                                                 spice_common_dep)
> >  endif

Frediano
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