RE: Trimming uclibc in l4

2014-09-18 Thread Masti Ramya Jayaram 
Hi,

I completely understand that I should update but given time constraints, I am 
using an older version on a board that it works. I will update it eventually.

I managed to backport the library which was 2 revisions ahead. In this version 
only the bootstrap module uses the minimal lib. I removed some more files from 
the minimal library (which my modified version does not need) and inspected the 
build folder.

The actual library reduces in size expected. However, I see that the 
bootstrap.elf executable increases in size. Furthermore, when I use the make 
elfimage command (e.g., make elfimage E=l4linux), changing the list of files in 
the uclibc library does not seem to have any effect on the final executable's 
size (i.e., bootstrap_l4linux.elf).

I can confirm that bootstrap builds against the minimal library because not 
having it there simply cause the build to fail. However, I do not understand 
why modifying the list of files in the library does not change anything.

Thanks in advance,
ramya

From: l4-hackers [l4-hackers-boun...@os.inf.tu-dresden.de] on behalf of Björn 
Döbel [doe...@os.inf.tu-dresden.de]
Sent: 16 September 2014 19:15
To: l4-hackers@os.inf.tu-dresden.de
Subject: Re: Trimming uclibc  in l4

Hi,

as Marcus already pointed out, newer versions of L4Re actually contain a
package called uclibc_minimal that serves exactly this purpose. Even if
you are using an older snapshot, chances are that backporting this
package (and adapting l4/mk) might be easier than stripping things down
yourself.

Bjoern

Am 16.09.2014 um 19:02 schrieb Masti Ramya Jayaram:
 Update: turns out it is not very simple to compile just bootstrap against a 
 smaller library because the l4/mk/modes.inc file defaults to the uclibc 
 library for compiling the files which is used for all packages. Any ideas how 
 I can change this only for some packages?

 Thanks.
 Ramya
 
 From: l4-hackers [l4-hackers-boun...@os.inf.tu-dresden.de] on behalf of Masti 
  Ramya Jayaram [rma...@inf.ethz.ch]
 Sent: 16 September 2014 17:53
 To: l4-hackers@os.inf.tu-dresden.de
 Subject: Trimming uclibc  in l4

 Dear all,

 I would like to extract the minimal subset of uclibc required by bootstrap, 
 sigma and their dependencies only. My idea is to have these modules use the 
 smaller libc while retain the usual uclibc build for the other packages.

 I intend to go about this by copying uclibc (say into uclibc_min) and then 
 modifying the contrib_files_all.lst and contrib_files_x86.lst. Is this the 
 correct way to do this?

 Also, I extracted all the package dependencies of bootstrap and sigma from 
 the control files (below)

 bootstrap: drivers_uart drivers_of libc l4util cxx_io
 drivers-frst:libc
 l4util: crtn libc
 crtn: l4sys
 l4sys: ldscripts
 l4util: crtn libc
 cxx: l4sys l4util
 ulibc: l4sys
 sigma0: crtn l4sys l4util libsigma0 cxx_io
 libsigma0:  l4sys


 Is this the correct way to do this as well?

 Thanks,
 Ramya



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Trimming uclibc in l4

2014-09-16 Thread Masti Ramya Jayaram 
Dear all,

I would like to extract the minimal subset of uclibc required by bootstrap, 
sigma and their dependencies only. My idea is to have these modules use the 
smaller libc while retain the usual uclibc build for the other packages. 

I intend to go about this by copying uclibc (say into uclibc_min) and then 
modifying the contrib_files_all.lst and contrib_files_x86.lst. Is this the 
correct way to do this?

Also, I extracted all the package dependencies of bootstrap and sigma from the 
control files (below)

bootstrap: drivers_uart drivers_of libc l4util cxx_io
drivers-frst:libc
l4util: crtn libc
crtn: l4sys
l4sys: ldscripts
l4util: crtn libc
cxx: l4sys l4util
ulibc: l4sys
sigma0: crtn l4sys l4util libsigma0 cxx_io
libsigma0:  l4sys


Is this the correct way to do this as well?

Thanks,
Ramya



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RE: Trimming uclibc in l4

2014-09-16 Thread Masti Ramya Jayaram 
Update: turns out it is not very simple to compile just bootstrap against a 
smaller library because the l4/mk/modes.inc file defaults to the uclibc library 
for compiling the files which is used for all packages. Any ideas how I can 
change this only for some packages?

Thanks.
Ramya

From: l4-hackers [l4-hackers-boun...@os.inf.tu-dresden.de] on behalf of Masti  
Ramya Jayaram [rma...@inf.ethz.ch]
Sent: 16 September 2014 17:53
To: l4-hackers@os.inf.tu-dresden.de
Subject: Trimming uclibc  in l4

Dear all,

I would like to extract the minimal subset of uclibc required by bootstrap, 
sigma and their dependencies only. My idea is to have these modules use the 
smaller libc while retain the usual uclibc build for the other packages.

I intend to go about this by copying uclibc (say into uclibc_min) and then 
modifying the contrib_files_all.lst and contrib_files_x86.lst. Is this the 
correct way to do this?

Also, I extracted all the package dependencies of bootstrap and sigma from the 
control files (below)

bootstrap: drivers_uart drivers_of libc l4util cxx_io
drivers-frst:libc
l4util: crtn libc
crtn: l4sys
l4sys: ldscripts
l4util: crtn libc
cxx: l4sys l4util
ulibc: l4sys
sigma0: crtn l4sys l4util libsigma0 cxx_io
libsigma0:  l4sys


Is this the correct way to do this as well?

Thanks,
Ramya



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RE: Trimming uclibc in l4

2014-09-16 Thread Masti Ramya Jayaram 
Hey Markus,

I am using a version from April 2011 but even that version contains a lot of 
things that bootstrap and sigma0 do not need. :)  Did you mean more recent than 
that?

best,
ramya

p.s. my board requires that I run an older version of the kernel - so the pain.

From: l4-hackers [l4-hackers-boun...@os.inf.tu-dresden.de] on behalf of Marcus 
Hähnel [mhaeh...@os.inf.tu-dresden.de]
Sent: 16 September 2014 18:31
To: l4-hackers@os.inf.tu-dresden.de
Subject: Re: Trimming uclibc  in l4

Hi,

 I would like to extract the minimal subset of uclibc required by
 bootstrap, sigma and their dependencies only. My idea is to have these
 modules use the smaller libc while retain the usual uclibc build for
 the other packages.

Great idea, but you should probably update your L4Re. L4Re features
such a minimal version since about 2011. So no need to do the same work
twice :)

- Marcus



 I intend to go about this by copying uclibc (say into uclibc_min) and
 then modifying the contrib_files_all.lst and contrib_files_x86.lst. Is
 this the correct way to do this?

 Also, I extracted all the package dependencies of bootstrap and sigma
 from the control files (below)

 bootstrap: drivers_uart drivers_of libc l4util cxx_io
 drivers-frst:libc
 l4util: crtn libc
 crtn: l4sys
 l4sys: ldscripts
 l4util: crtn libc
 cxx: l4sys l4util
 ulibc: l4sys
 sigma0: crtn l4sys l4util libsigma0 cxx_io
 libsigma0:  l4sys


 Is this the correct way to do this as well?

 Thanks,
 Ramya



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 l4-hackers@os.inf.tu-dresden.de
 http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers

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Re: Trimming uclibc in l4

2014-09-16 Thread Björn Döbel 

Hi,

as Marcus already pointed out, newer versions of L4Re actually contain a 
package called uclibc_minimal that serves exactly this purpose. Even if 
you are using an older snapshot, chances are that backporting this 
package (and adapting l4/mk) might be easier than stripping things down 
yourself.


Bjoern

Am 16.09.2014 um 19:02 schrieb Masti Ramya Jayaram:

Update: turns out it is not very simple to compile just bootstrap against a 
smaller library because the l4/mk/modes.inc file defaults to the uclibc library 
for compiling the files which is used for all packages. Any ideas how I can 
change this only for some packages?

Thanks.
Ramya

From: l4-hackers [l4-hackers-boun...@os.inf.tu-dresden.de] on behalf of Masti  
Ramya Jayaram [rma...@inf.ethz.ch]
Sent: 16 September 2014 17:53
To: l4-hackers@os.inf.tu-dresden.de
Subject: Trimming uclibc  in l4

Dear all,

I would like to extract the minimal subset of uclibc required by bootstrap, 
sigma and their dependencies only. My idea is to have these modules use the 
smaller libc while retain the usual uclibc build for the other packages.

I intend to go about this by copying uclibc (say into uclibc_min) and then 
modifying the contrib_files_all.lst and contrib_files_x86.lst. Is this the 
correct way to do this?

Also, I extracted all the package dependencies of bootstrap and sigma from the 
control files (below)

bootstrap: drivers_uart drivers_of libc l4util cxx_io
drivers-frst:libc
l4util: crtn libc
crtn: l4sys
l4sys: ldscripts
l4util: crtn libc
cxx: l4sys l4util
ulibc: l4sys
sigma0: crtn l4sys l4util libsigma0 cxx_io
libsigma0:  l4sys


Is this the correct way to do this as well?

Thanks,
Ramya



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RE: Trimming uclibc in l4

2014-09-16 Thread Marcus Hähnel 

Hi Ramya,

On 2014-09-16 19:05, Masti  Ramya Jayaram wrote:

Hey Markus,

I am using a version from April 2011 but even that version contains a
lot of things that bootstrap and sigma0 do not need. :)  Did you mean
more recent than that?


this version is severely outdated :x. Please use a recent version 
(read: the current snapshot or svn head) unless you have a very good 
reason not to. Especially since it already contains features such as 
minimal uclibc for core programs, which you obviously want.
Using recent versions will also help us help you, as a lot has changed 
in over 3 years.


Best regards

- Marcus



best,
ramya

p.s. my board requires that I run an older version of the kernel - so 
the pain.


From: l4-hackers [l4-hackers-boun...@os.inf.tu-dresden.de] on behalf
of Marcus Hähnel [mhaeh...@os.inf.tu-dresden.de]
Sent: 16 September 2014 18:31
To: l4-hackers@os.inf.tu-dresden.de
Subject: Re: Trimming uclibc  in l4

Hi,


I would like to extract the minimal subset of uclibc required by
bootstrap, sigma and their dependencies only. My idea is to have 
these

modules use the smaller libc while retain the usual uclibc build for
the other packages.


Great idea, but you should probably update your L4Re. L4Re features
such a minimal version since about 2011. So no need to do the same 
work

twice :)

- Marcus




I intend to go about this by copying uclibc (say into uclibc_min) and
then modifying the contrib_files_all.lst and contrib_files_x86.lst. 
Is

this the correct way to do this?

Also, I extracted all the package dependencies of bootstrap and sigma
from the control files (below)

bootstrap: drivers_uart drivers_of libc l4util cxx_io
drivers-frst:libc
l4util: crtn libc
crtn: l4sys
l4sys: ldscripts
l4util: crtn libc
cxx: l4sys l4util
ulibc: l4sys
sigma0: crtn l4sys l4util libsigma0 cxx_io
libsigma0:  l4sys


Is this the correct way to do this as well?

Thanks,
Ramya



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