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meson: Warn when TCI is selected but TCG backend is available

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Some new users get confused with 'TCG' and 'TCI', and enable TCI
support expecting to enable TCG.

Emit a warning when native TCG backend is available on the
host architecture, mentioning this is a suboptimal configuration.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Suggested-by: Daniel Berrangé <berrange@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210125144530.2837481-5-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2021-01-25 15:45:30 +01:00 committed by Paolo Bonzini
parent 39687aca6a
commit fa2f7b0b9b
1 changed files with 7 additions and 0 deletions
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7
meson.build
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@ -231,6 +231,13 @@ if not get_option('tcg').disabled()
else
error('Unsupported CPU @0@, try --enable-tcg-interpreter'.format(cpu))
endif
elif get_option('tcg_interpreter')
warning('Use of the TCG interpretor is not recommended on this host')
warning('architecture. There is a native TCG execution backend available')
warning('which provides substantially better performance and reliability.')
warning('It is strongly recommended to remove the --enable-tcg-interpreter')
warning('configuration option on this architecture to use the native')
warning('backend.')
endif
if get_option('tcg_interpreter')
tcg_arch = 'tci'