[Buildroot] How to get gdb in the image

[Buildroot] How to get gdb in the image

[JNY]

Hi,

I need gdb on my target, so selected the gdb options available to me in
buildroot (Toolchain->Build gdb degugger for the target, Toolchain->Build
gdb server for the target, Toolchain->Build gdb for the host, Toolchain->GDB
Debugger Version 6.8).  I then re-made, and installed the output image, but
still gdb is not recognised on the target after installation.

Any ideas would be received with thanks (and admiration - don't know if
flattery will help, but I figure it's worth a shot ;-))

Regards,
JNY
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[Buildroot] How to get gdb in the image

[Will Moore]

> -----Original Message-----
> From: buildroot-bounces at busybox.net [mailto:buildroot-bounces at busybox.net]
> On Behalf Of JNY
> Sent: 20 August 2010 15:48
> 
> Hi,
> 
> I need gdb on my target, so selected the gdb options available to me in
> buildroot (Toolchain->Build gdb degugger for the target, Toolchain->Build
> gdb server for the target, Toolchain->Build gdb for the host, Toolchain-
> >GDB
> Debugger Version 6.8).  I then re-made, and installed the output image,
> but
> still gdb is not recognised on the target after installation.

If you want to perform remote debug then you will need gdbserver on the
target and gdb on the host.  There is no need to build gdb for the target.

If you want to perform debug on the target then you will need gdb for the
target.  There is no need to build gdbserver for the target nor gdb for the
host, I assume, although I never do this as having dev tools on the target
seems a bit over the top to me.

This may just be an example of buildroot not rebuilding properly.  See
http://buildroot.uclibc.org/downloads/buildroot.html#rebuilding_packages for
more information on how to coax buildroot to rebuild a package.

> 
> Any ideas would be received with thanks (and admiration - don't know if
> flattery will help, but I figure it's worth a shot ;-))
> 
> Regards,
> JNY
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> image-tp29492552p29492552.html
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> 
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> buildroot mailing list
> buildroot at busybox.net
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[Buildroot] How to get gdb in the image

[JNY]

Hi,

Thanks for the response.

The following
(http://buildroot.uclibc.org/downloads/buildroot.html#rebuilding_packages)
seems to give advice on how to remove packeges.  As neither gdb nor
gdbserver were not on the origial build, I need help with adding these
missing packages, rather than removing them.
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[Buildroot] How to get gdb in the image

[Thomas Petazzoni]

Hello,

On Fri, 20 Aug 2010 07:48:13 -0700 (PDT)
JNY <jny0@hotmail.com> wrote:

> I need gdb on my target, so selected the gdb options available to me
> in buildroot (Toolchain->Build gdb degugger for the target,
> Toolchain->Build gdb server for the target, Toolchain->Build gdb for
> the host, Toolchain->GDB Debugger Version 6.8).  I then re-made, and
> installed the output image, but still gdb is not recognised on the
> target after installation.

You need to enable:

  Toolchain -> Build gdb server for the target
  Toolchain -> Build gdb for the host

Then, remove everything (make clean), and rebuild everything (make).

Basically, any change in the Toolchain submenu requires a complete
rebuild.

Regards,

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

[Buildroot] How to get gdb in the image

[JNY]

Hi,

Since adding gdb to the menuconfig, buildroot no longer makes.  I get the
following errors and warnings:

getgroups.c: In function 'main':
getgroups.c:56: warning: attempt to free a non-heap object 'groups'
  TEST_LINK pwd_grp/ grcat
  TEST_LINK pwd_grp/ pwcat
  TEST_LINK pwd_grp/ test_grp
  TEST_LINK pthread/ ex1
  TEST_LINK pwd_grp/ test_pwd
  TEST_LINK pthread/ ex2
  TEST_LINK pthread/ ex3
  TEST_LINK pthread/ ex4
  TEST_LINK pthread/ ex5
  TEST_LINK pthread/ ex6
  TEST_LINK pthread/ ex7
  TEST_LINK pthread/ tst-too-many-cleanups
  TEST_LINK regex/ testregex
  TEST_LINK rpc/ getrpcent
  TEST_LINK regex/ testregexc
  TEST_LINK setjmp/ bug269-setjmp
  TEST_LINK regex/ testregexf
  TEST_LINK setjmp/ jmpbug
  TEST_LINK setjmp/ sigjmpbug
  TEST_LINK setjmp/ tst-setjmp
  TEST_LINK setjmp/ tst-vfork-longjmp
  TEST_LINK signal/ sigchld
  TEST_LINK regex/ testregexi
  TEST_LINK signal/ signal
  TEST_LINK signal/ tst-raise
  TEST_LINK signal/ tst-signal
  TEST_LINK signal/ tst-sigset
  TEST_LINK silly/ hello
  TEST_LINK regex/ testregexl
  TEST_LINK silly/ tiny
  TEST_LINK stat/ memcmp-stat
memcmp-stat.c: In function 'show_stat':
memcmp-stat.c:60: error: 'struct stat' has no member named 'st_atimensec'
memcmp-stat.c:62: error: 'struct stat' has no member named 'st_mtimensec'
memcmp-stat.c:64: error: 'struct stat' has no member named 'st_ctimensec'
make[2]: *** [memcmp-stat] Error 1
make[1]: *** [_dircompile_stat] Error 2
make[1]: *** Waiting for unfinished jobs....
  TEST_LINK regex/ testregexn
  TEST_LINK regex/ testregexp
  TEST_LINK regex/ testregexr
  TEST_LINK regex/ tst-regex2
In file included from
/home/JB/Apps/Buildroot2/buildroot-2010.02/output/staging/usr/include/bits/sigcontext.h:31,
                 from
/home/JB/Apps/Buildroot2/buildroot-2010.02/output/staging/usr/include/signal.h:333,
                 from ../test-skeleton.c:25,
                 from tst-regex2.c:244:
/home/JB/Apps/Buildroot2/buildroot-2010.02/output/staging/usr/include/asm/sigcontext.h:96:
warning: declaration does not declare anything
  TEST_LINK regex/ tst-regexloc
make[1]: Leaving directory
`/home/JB/Apps/Buildroot2/buildroot-2010.02/output/toolchain/uClibc-0.9.30.2/test'
make: ***
[/home/JB/Apps/Buildroot2/buildroot-2010.02/output/toolchain/uClibc-0.9.30.2/test/unistd/errno]
Error 2

Cheers,
JNY

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[Buildroot] How to get gdb in the image

[Thomas Petazzoni]

On Sat, 21 Aug 2010 01:21:29 -0700 (PDT)
JNY <jny0@hotmail.com> wrote:

> Since adding gdb to the menuconfig, buildroot no longer makes.  I get
> the following errors and warnings:

Are you sure you have added *only* gdb ? The error message you're
showing seems to come from the uClibc test suite. I think you have
mistakenly enabled BR2_UCLIBC_INSTALL_TEST_SUITE in addition to
enabling gdb.

Regards,

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

[Buildroot] How to get gdb in the image

[JNY]

> Since adding gdb to the menuconfig, buildroot no longer makes.  I get the
following errors and warnings: 

Hi,

I managed to get around the previous error by removing the linux config, and
using the default settings.  The toolchain still seems to work (so I assume
the linux config was probably default anyway), but still having problems
with gdb however.  A gdbserver directory has appeared in the output->build
directory, which I copoed to the target, but when I run it, I'm told
"Permissions Denied".
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