When an external toolchain without thread debug is used, the gdb
package can be selected, but no version can be choosen, since none
match any of the requirements. This leads Buildroot to try to build
gdb for the target without a version being defined, as in the
following build log:
http://autobuild.buildroot.org/results/84e8fd2df0cc22448052a572c2e9a6e03dd137eb/build-end.log
To fix this, we adjust the dependencies of the BR2_PACKAGE_GDB option
so that the package as a whole is not selectable when the required
conditions are not met. Basically, we have the choice of:
* Having a toolchain that supports thread debugging, which is needed
for gdb >= 7.x
* Having BR2_DEPRECATED enabled, which allows gdb 6.8 to be selected,
which doesn't require thread debugging
* Using bfin, since this architectures has a special old gdb version
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
When an external toolchain is used, it is very likely that it contains
a pre-built version of a gdbserver that has the same version as the
cross-gdb included in the external toolchain. So, we now provide an
option that allows to copy this pre-built gdbserver to the target.
As the location of the gdbserver in the external toolchain is not
standardized, we only support the CodeSourcery and Crosstool-NG
layouts for the moment. Other locations can be added later.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Newer versions of GDB need pthread debugging support if threads are
enabled, which is always the case for glibc but is a configure option
for uClibc.
We have solved this for internal toolchains by selecting the
BR2_PTHREAD_DEBUG option from the GDB selection if needed, but as this
option isn't available when ctng/external toolchains are used, mconf
prints ugly warnings and the build may fail if an external uClibc
toolchain without pthread debugging support is used.
Fix it by introducing 2 more hidden config options:
- BR2_TOOLCHAIN_HAS_THREADS_DEBUG
- BR2_TOOLCHAIN_HAS_THREADS_DEBUG_IF_NEEDED
The first tells us if the toolchain HAS pthreads debugging support,
and is checked by check_uclibc_feature in helper.mk for external uClibc
based toolchains.
The second tells us if the toolchain is ABLE TO provide pthreads debugging
support if threads are enabled, either because it's an internal toolchain
where we can force enable it or an external glibc/eglibc toolchain or
uClibc with the option enabled.
Crosstool-ng forcibly enables this support, so those will always work.
The preconfigured uClibc-based toolchains we have also all enable it.
Finally, show a comment if this isn't the case so the (external toolchain)
user knows why. This is placed outside the choice option, as menuconfig
has a bug where it doesn't show choice selections which only contain
comments.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Compiling gdb for the target requires thread support in the C library,
otherwise:
/home/test/outputs/test-888/toolchain/gdb-7.3.1/gdb/gdb_thread_db.h:37:21: fatal error: pthread.h: No such file or directory
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The gdb debugger does not have support for running as the native
debugger on the SuperH architecture:
configure: error: "*** Gdb does not support native target sh4-unknown-linux-gnu"
See also http://lists.debian.org/debian-superh/2010/04/msg00000.html.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The gdb tarballs have been re-released after a GPL compliance
issue was found:
http://sourceware.org/ml/gdb/2011-09/msg00030.html
So all versions were re-packaged.
In the process, an 'a' was appended to the version strings, and
unlike the binutils people, the gdb folks are not inclined in
providing legacy symlinks:
http://sourceware.org/ml/gdb/2011-09/msg00036.html
So, this patch fixes the issue by renaming version strings. It is to be
noted that, although the versions got bumped to include an 'a' at the end,
the directory contained in the tarball is still named after the version
string without the 'a'. For example:
- old version : 6.6
- new version : 6.6a
- tarball name : gdb-6.6a.tar.bz2
- directory name : gdb-6.6/
In fact, it does not pose any problem for buildroot, as the extract process
explicitly mkdirs the directory to extract into, *and* strips the first level
of the tree extracted from the tarball.
[Peter: fixup patch to apply to head, don't rename config symbols]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
this version fixes compilation issue on some old build systems like
openSUSE 10.3 saying some host libraries were too old
[Peter: drop bugfix number from config name, similar to kernel-headers]
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This requires removing "deprecated" markings from gdb-6.6, but this isn't
that big of a deal. That is the last version with Blackfin support at the
moment and we're in the process of getting mainlined.
[Peter: only mark as undeprecated on bfin]
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The cross-gdb is supposed to be part of the external toolchain, so
Buildroot does not need to build it. Moreover, GDB_HOST build
currently fail with:
ln -snf ../../bin/arm-unknown-linux-gnueabi-gdb \
/home/test/outputs/test-48/staging/usr/arm-unknown-linux-gnueabi/bin/gdb
ln: creating symbolic link `/home/test/outputs/test-48/staging/usr/arm-unknown-linux-gnueabi/bin/gdb': No such file or directory
And even worse: they overwrite the cross-gdb of the external
toolchain!
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
These are ancient (2006) and upstream strongly discourage using them:
ftp://sourceware.org/pub/gdb/old-releases/README
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Has been marked as broken for more than 1 year, with no indication
that anyone cares, and it needs a bunch of special handling.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
* Add a new gdb version for AVR32 in Config.in
* Use a special mirror for this gdb version in gdb.mk
* Do not try to apply patches when the patch directory does not exist
in gdb.mk
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The term gdb-client is deceptive - although it parallels the gdb-server name,
it is actually a full fledged gdb version. I want to use it to debug uClibc
core files on my host system. Although I haven't got that to work yet, I wasted
time figuring out how to do build gdb for the host not realizing it already had
a target. With this documentation change, things would have been a lot clearer
to me.
