How to get gdb in the image

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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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.

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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Hello,

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

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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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

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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