[yocto] using gdb with externalsrc

[Dave Kimble]

One more piece of information that may or may not be relevant:

When I build normally, the logs generated for the component in question are these:
log.do_compile
log.do_configure
log.do_fetch
log.do_install
log.do_package
log.do_packagedata
log.do_package_write_rpm
log.do_patch
log.do_populate_lic
log.do_populate_sysroot
log.do_unpack

When I use externalsrc, the logs are these:
log.do_packagedata_setscene
log.do_package_write_rpm_setscene
log.do_populate_lic_setscene
log.do_populate_sysroot_setscene

The Yocto docs state "Building software from an external source tree means that the build system's normal fetch, unpack, and patch process is not used." That would leave several processes that don't have a log file. Are the logs put in a different place for an externalsrc component?



________________________________________
From: Dave Kimble
Sent: Thursday, July 16, 2015 11:20 AM
To: Khem Raj
Cc: yocto at yoctoproject.org
Subject: RE: [yocto] using gdb with externalsrc

The path is S (externalsrc path).

compiler flags:
i586-poky-linux-gcc  -m32 -march=i586 --sysroot=[sysroot dir] -DHAVE_CONFIG_H -I. -I[externalsrc dir] -I..   -D_ANSC_LINUX -D_ANSC_USER -D_ANSC_LITTLE_ENDIAN_  -O2 -pipe -g -feliminate-unused-debug-types     -c -o [component].o `test -f '[component source file]'

(gdb) show directories
Source directories searched: $cdir:$cwd


Would it work to do add a do_package_append() that just manually copies the sources?


________________________________________
From: Khem Raj <raj.khem at gmail.com>
Sent: Wednesday, July 15, 2015 8:54 PM
To: Dave Kimble
Cc: yocto at yoctoproject.org
Subject: Re: [yocto] using gdb with externalsrc

On Wed, Jul 15, 2015 at 2:52 PM, Dave Kimble <dkimble at alticast.com> wrote:
> Yes, I'm able to debug the externalsrc component. I can see variables, set
> breakpoints, step/next through the code etc. (so the symbols are valid). And
> local changes to the externalsrc component are reflected when I debug.
>
> But I can't list the externalsrc component source code from within gdb (or
> find it anywhere in the image). The source for all of the other components
> is in the image (and I can list it in gdb). When I try to list the code for
> the externalsrc component, gdb prints this error message:
> "[path on my build machine]/sourceFile.c: No such file or directory."

is this path pointing to S which is externalsrc path or to B which is
under build TMPDIR
and secondly, can you see compiler flags used during build for externalsrc ?

are you using master branch ?

what does show directories say

>
> If I don't use externalsrc at all, I can debug all of the components and
> list source code for all of them from within gdb.
>
> So, I can't solve how to get the externalsrc source code into the image. I
> don't mind if I have to use "set substitute-path" from within gdb if
> externalsrc source files are put in a different place (although, it'd be
> ideal if they were put in the same place).
>

sources are embedded in debug info, most probably when debug-split is done
at that point there could be something going wrong where its not able
to put the right path links