[Buildroot] Problems with NetSNMP

[Buildroot] Problems with NetSNMP

[Chris Kerios]

Hi,
I am trying to get netsnmp package running on my Geode LX.
Development host is x86 running Fedora 13.  Target is previously
mentioned Geode.  Buildroot is the latest git pull as of this morning.

I did a fresh build of everything, toolchain, uLibC, kernel, rootfs, etc.

The build runs cleanly with no errors, including the netsnmp package
build.  When run on the target the snmpd launch fails with the message
that it can't load libc.so.6.  So I created a link of libc.so.6 to
libuClibc-0.9.31.so and relaunched the snmpd.  This fails with a new
error that it can't load libdl.so.2.  I create another link of
libdl.so.2 to libdl-0.9.31.so and relaunch snmpd.

This fails with a new error of "Starting network management
services:/usr/sbin/snmpd: can't resolve symbol '__xstat64' in lib
'/usr/lib/libnetsnmpmibs.so.20'"

Now I'm really stuck.  I've reviewed the mailing lists and this
problem appears to have cropped up previously a while ago regarding
the libraries not being found and statements reflect that it was
fixed.  There is a email this month regarding this problem but it was
with an external toolchain.  None of the problems mention the
unresolved reference to __xstat64.  Has the old problem reappeared?

Regards,
Chris

[Buildroot] Problems with NetSNMP

[Thomas Petazzoni]

Hello,

On Mon, 28 Jun 2010 11:39:05 -0400
Chris Kerios <ckerios@gmail.com> wrote:

> I am trying to get netsnmp package running on my Geode LX.
> Development host is x86 running Fedora 13.  Target is previously
> mentioned Geode.  Buildroot is the latest git pull as of this morning.
> 
> I did a fresh build of everything, toolchain, uLibC, kernel, rootfs, etc.
> 
> The build runs cleanly with no errors, including the netsnmp package
> build.  When run on the target the snmpd launch fails with the message
> that it can't load libc.so.6.  So I created a link of libc.so.6 to
> libuClibc-0.9.31.so and relaunched the snmpd.  This fails with a new
> error that it can't load libdl.so.2.  I create another link of
> libdl.so.2 to libdl-0.9.31.so and relaunch snmpd.

Unfortunately, this isn't going to work. Having netsnmp depend on
libc.so.6 means that it was linked against glibc, while Buildroot
generates uClibc toolchains.

> This fails with a new error of "Starting network management
> services:/usr/sbin/snmpd: can't resolve symbol '__xstat64' in lib
> '/usr/lib/libnetsnmpmibs.so.20'"
> 
> Now I'm really stuck.  I've reviewed the mailing lists and this
> problem appears to have cropped up previously a while ago regarding
> the libraries not being found and statements reflect that it was
> fixed.  There is a email this month regarding this problem but it was
> with an external toolchain.  None of the problems mention the
> unresolved reference to __xstat64.  Has the old problem reappeared?

The issue seems to be that netsnmp build procedure in Buildroot isn't
correct and somehow uses the host C library. If nobody does so in the
mean time, I'll try to have a look this week.

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] Problems with NetSNMP

[Chris Kerios]

Understood.  As I don't have the background on what is going on with
the build systems other than to execute them, any time you can afford
to this is appreciated.  We would very much like to have the agent
piece at least operating on our target systems.
Chris

On Mon, Jun 28, 2010 at 12:33 PM, Thomas Petazzoni
<thomas.petazzoni@free-electrons.com> wrote:
> Hello,
>
> On Mon, 28 Jun 2010 11:39:05 -0400
> Chris Kerios <ckerios@gmail.com> wrote:
>
>> I am trying to get netsnmp package running on my Geode LX.
>> Development host is x86 running Fedora 13. ?Target is previously
>> mentioned Geode. ?Buildroot is the latest git pull as of this morning.
>>
>> I did a fresh build of everything, toolchain, uLibC, kernel, rootfs, etc.
>>
>> The build runs cleanly with no errors, including the netsnmp package
>> build. ?When run on the target the snmpd launch fails with the message
>> that it can't load libc.so.6. ?So I created a link of libc.so.6 to
>> libuClibc-0.9.31.so and relaunched the snmpd. ?This fails with a new
>> error that it can't load libdl.so.2. ?I create another link of
>> libdl.so.2 to libdl-0.9.31.so and relaunch snmpd.
>
> Unfortunately, this isn't going to work. Having netsnmp depend on
> libc.so.6 means that it was linked against glibc, while Buildroot
> generates uClibc toolchains.
>
>> This fails with a new error of "Starting network management
>> services:/usr/sbin/snmpd: can't resolve symbol '__xstat64' in lib
>> '/usr/lib/libnetsnmpmibs.so.20'"
>>
>> Now I'm really stuck. ?I've reviewed the mailing lists and this
>> problem appears to have cropped up previously a while ago regarding
>> the libraries not being found and statements reflect that it was
>> fixed. ?There is a email this month regarding this problem but it was
>> with an external toolchain. ?None of the problems mention the
>> unresolved reference to __xstat64. ?Has the old problem reappeared?
>
> The issue seems to be that netsnmp build procedure in Buildroot isn't
> correct and somehow uses the host C library. If nobody does so in the
> mean time, I'll try to have a look this week.
>
> Thomas
> --
> Thomas Petazzoni, Free Electrons
> Kernel, drivers, real-time and embedded Linux
> development, consulting, training and support.
> http://free-electrons.com
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