dhcpcd-discuss

The binary needs to match the core, you are correct.

Do you still have the old binary and core? If so, mail them privately to 
me please.

Roy

On 13/10/2019 19:24, Ron Varburg wrote:
> For the last few experiments, possibly all with debugging symbols on, it 
> didn't dump core.
> I will report when it happen again. I am still not sure I can backtrace 
> with debugging symbols.
> I assume gdb is unable to backtrace with debugging symbols when 
> executable newer the core is expected.
> On Sunday, October 13, 2019, 10:40:25 AM GMT+1, Roy Marples 
> <roy@xxxxxxxxxxxx> wrote:
>
>
> ./configure --debug
> make clean
> make
>
> Should be enough.
> You can use `make proginstall` to just install the debug dhcpcd binary.
> Ensure that the paths match the system or package though otherwise it
> will use files in different locations.
>
> Roy
>
> On 13/10/2019 01:10, Ron Varburg wrote:
>  > I can try getting a backtrace with debugging symbols.
>  > To start with, gdb tells me `No debugging symbols found', even though
>  > the executable is supposedly not stripped.
>  > Am I right cc ... -DNDEBUG ... means No DEBUG?
>  > Am I right I will better some how arrange a -g for both CFLAGS and 
> LDFLAGS?
>  > On Saturday, October 12, 2019, 11:06:27 PM GMT+1, Roy Marples
>  > <roy@xxxxxxxxxxxx <mailto:roy@xxxxxxxxxxxx>> wrote:
>  >
>  >
>  > On 12/10/2019 21:46, Ron Varburg wrote:
>  >
>  >  > 7.2.2 seemed to worked well.
>  >  > After upgrading from 7.2.2 to 8.0.6, without any other version in
>  > between, 8.0.6 duped core.
>  >  >          Oct 11 08:06:43
>  >  >          #0  0x00005605aa8134f4 ipv6_handleifa (dhcpcd)
>  >  >          #1  0x00005605aa7f8dad if_learnaddrs (dhcpcd)
>  >  >          #2  0x00005605aa7f56bf dhcpcd_handleinterface (dhcpcd)
>  >  >          #3  0x00007fef53692381 n/a (udev.so)
>  >  >          #4  0x00005605aa7f733b eloop_start (dhcpcd)
>  >  >          #5  0x00005605aa7f1cff main (dhcpcd)
>  >  >          #6  0x00007fef534d4153 __libc_start_main (libc.so.6)
>  >  >          #7  0x00005605aa7f240e _start (dhcpcd)
>  >  > I reverted back to 7.2.2, which worked.
>  >  > Then I upgraded 7.2.2 to 8.1.0. After the 1st reboot, it seemed to 
> work.
>  >  > After a 2nd reboot, 8.1.0 dumped core.
>  >  >          Oct 12 19:15:35
>  >  >          Looks to me essentially the same dump.
>  >  >          That is, the same symbols as before, with the same order.
>  >  >          But at different memory addresses.
>  >  > After a 3rd reboot, 8.1.0 seems to work.
>  >  > This message is sent after the 3rd reboot.
>  >
>  >
>  > Can you get a backtrace with debugging symbols please?
>  >
>  > Roy
>  >
>  >