Re: [Minios-devel] [Unikraft] Static Libraries not being linked properly

[Wei Chen <Wei.Chen@xxxxxxx>]

I think currently the answer is ‘YES’. We could not link libc.a

directly in Unikraft. Libc.a requires some dependencies that

unikraft doesn’t provide.

 

From: Ajay Garg <ajaygargnsit@xxxxxxxxx>
Sent: 2018年4月18日 11:45
To: Wei Chen <Wei.Chen@xxxxxxx>
Cc: minios-devel@xxxxxxxxxxxxxxxxxxxx
Subject: Re: [Minios-devel] [Unikraft] Static Libraries not being linked properly

 

Ok Wei, got it ...

So, I added "/usr/lib/x86_64-linux-gnu/libc.a" also in "APPCOREMARK_OBJS-y", but the linking errors still persist.

I now assume that pre-compiled static libc.a CANNOT be added into unikraft, right?

 

On Wed, Apr 18, 2018 at 9:01 AM, Wei Chen <Wei.Chen@xxxxxxx> wrote:

Hi Ajay,

 

I think we have to classify the static-pre-compiled libraries.

For instance, if the static-pre-compiled library is a math library.

It just does some Mathematical Computing and doesn’t depend on

Other libraries. I think this math library can be link to

Unikraft. Another instance, if the static-pre-compiled library

depends on other libraries. You have to guarantee the dependent

libraries are in the Unikraft library pool.

 

In your case, the /usr/lib/x86_64-linux-gnu/librt.a and /usr/lib/x86_64-linux-gnu/libpthread.a

would link to libc.a to solve their link dependencies. But the nolibc

In Unikraft is just a subset of libc.a

 

Regards,

Wei Chen

 

From: Ajay Garg <ajaygargnsit@xxxxxxxxx>
Sent: 2018年4月18日 11:17
To: Wei Chen <Wei.Chen@xxxxxxx>
Cc: minios-devel@xxxxxxxxxxxxxxxxxxxx
Subject: Re: [Minios-devel] [Unikraft] Static Libraries not being linked properly

 

Hi Wei.

Thanks for the help.

Actually, my original query is how to link pre-compiled (static) libraries in unikraft?

I tried as per the documentation at
http://xenbits.xen.org/gitweb/?p=unikraft/unikraft.git;a=blob;f=doc/guides/developers-app.rst;h=45d9bd5b2bb10b3d04135d66b5162a59d54dc2b6;hb=HEAD#l163

but the libraries do not resolve linking problems.

Or am I understanding it incorrectly? Can pre-compiled static libraries be integrated/linked at all in unikraft?

 

 

On Wed, Apr 18, 2018 at 7:48 AM, Wei Chen <Wei.Chen@xxxxxxx> wrote:

But the clock_gettime hasn’t been implemented in nolibc or libtime.

If your application just uses this function to print timestampe, you

can implement a dummy function in your code in this time to pass the

linking.

 

 

--

Regards,
Ajay

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--

Regards,
Ajay

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