Re: [PATCH] use eglibc configuration file

[Arnaud Vrac <avrac at freebox dot fr>]

Yann E. MORIN wrote:
> Hello Arnaud!
>
> Next time, could you provide a patch that is ready to import into
> Mercurial?

Sorry about that, I'll do it properly next time !

> > @@ -90,3 +90,39 @@
> >
> >        Note that crosstool-NG will *not* update your working copy, you will
> >        have to do that yourself.
> > +
> > +config EGLIBC_USE_CUSTOM_CONFIG
> > +    bool
> > +    prompt "use user provided configuration file"
> > +    default n
> > +    help
> > +      Use a custom configuration file to disable some features in the eglibc
> > +      library. For more info read the EGLIBC.option-groups file in the eglibc
> > +      source directory. 
> > +
> > +if EGLIBC_USE_CUSTOM_CONFIG
> > +    config EGLIBC_OPTION_GROUPS_FILE
> > +        string
> > +        prompt "Option groups configuration file"
> > +        default ""
> > +        help
> > +          Path to the file to configure eglibc option groups.
>
> If I understand correctly, this file contains the options to enable/disable.

Yes, like in the uclibc config file. Some options are dependent on 
others so you have to read the help file carefully to get a working 
configuration. The help is located in the option-groups.def file in the 
eglibc sources.

> > +    config EGLIBC_NSS_CONFIG_FILE
> > +        string
> > +        prompt "NSS config file"
> > +        default ""
> > +        help
> > +          Path to the nsswitch configuration file when the
> > +          OPTION_EGLIBC_NSSWITCH feature is disabled in the option groups
> > +          configuration file.
>
> So what is this file for? I don't know why I should have an NSS config file
> if I specifically _disabled_ NSS. The help entry is confusing.

I guess the help text is not very explicit. In fact, setting 
OPTION_EGLIBC_NSSWITCH to n in the option groups file does not disable 
it, it only makes the nss code and configuration static in the libc 
instead of loading the nss libraries at runtime using the 
/etc/nsswitch.conf file.

For more information, you can read the help on the 
OPTION_EGLIBC_NSSWITCH option here:

http://www.eglibc.org/cgi-bin/viewcvs.cgi/trunk/libc/option-groups.def?view=auto

For my tests I used the example files that are provided in the eglibc 
sources, nss/fixed-nsswitch.conf and nss/fixed-nsswitch.functions. There 
files define the minimal info needed for nss to work correctly.

Thanks,

--
Arnaud Vrac

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