Re: [PATCH] configure: Fail when specified cross compiler cannot be found

[Paolo Bonzini]

On 17/12/20 18:56, Alex Bennée wrote:
> To be honest at the moment the information is a little hidden at the top
> of the output. It would be nice if we could teach meson to echo it in
> it's nice coloured output.
>
> Paolo,
>
> Any ideas for the cleanest way to do that?

The code in configure is pretty small:

(for i in $cross_cc_vars; do
  export $i
done
export target_list source_path use_containers
$source_path/tests/tcg/configure.sh)

configure would place the cross-cc variables (which are really just 
command line options) in a file, something like config-cross-cc.mak, and 
the Meson translation of the above would be

env = environment()
foreach k, v : keyval.load(meson.current_build_dir() / 
'config-cross-cc.mak')
  env.set(k, v)
endforeach
env.set('target_list', ','.join(target_dirs))
env.set('source_path', meson.source_root())
env.set('use_containers',
        'CROSS_CC_CONTAINERS' in config_host ? 'yes' : 'no')
message(run_command(files('tests/tcg/configure.sh'), env: env).stdout())

For a bit more polish, one could make tests/tcg/configure.sh print the 
result in keyval format, parse it back from meson as a dictionary with 
keyval.load(), and pass the result to summary().

Paolo