What is the difference between make oldconfig and make menuconfig?

What is the difference between make oldconfig and make menuconfig?

[Hao Lee]

I know make oldconfig is used to update my old .config to a newer one
and it will prompt me questions about the new configuration options.
However, make menuconfig can also handle old .config file properly and
it doesn't prompt any questions. I don't know what happened when
menuconfig processes my old .config file. Does it make decisions for
me automatically? Thanks.

Regards,
Hao Lee

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Re: What is the difference between make oldconfig and make menuconfig?

[Valdis Klētnieks]

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On Sat, 11 Apr 2020 23:09:54 +0800, Hao Lee said:
> I know make oldconfig is used to update my old .config to a newer one
> and it will prompt me questions about the new configuration options.
> However, make menuconfig can also handle old .config file properly and
> it doesn't prompt any questions. I don't know what happened when
> menuconfig processes my old .config file. Does it make decisions for
> me automatically? Thanks.

If the Kconfig file uses a 'default' clause for the option, menuconfig will use
that. If not, I believe it defaults to 'No'.


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