The Linaro Toolchain Working Group is pleased to announce the 2010.10
consolidation release including Linaro GCC 4.4, Linaro GCC 4.5, and
the first version of Linaro GDB 7.2.
Linaro GDB 7.2 2010.10-0 is the first release in the 7.2 series. Based
off the latest GDB 7.2, it includes a number of ARM-focused bug fixes
and enhancements.
Interesting changes include:
* Backtraces in Thumb-2 code are significantly improved
* Much better prologue and epilogue parsing
* Improved software watchpoint support
* Many test suite tidy-ups
Linaro GCC 4.5 is the third release in the 4.5 series. Based off the
latest GCC 4.5.1+svn, it includes many ARM-focused performance
improvements and bug fixes.
Linaro GCC 4.4 is the fourth release in the 4.4 series. Based off the
latest GCC 4.4.5, it fixes many of the issues found during building
Ubuntu over the last few months.
Interesting changes include:
* Linaro GCC 4.4 is now based off FSF GCC 4.4.5
* Cortex A8 and Cortex A9 scheduler NEON improvements
* Better code generation for constant addresses with inline assembly
* Better code for copying small constant strings
* Various correctness improvements
Downloads are available from the Linaro GCC and GDB pages on Launchpad:
https://launchpad.net/gcc-linarohttps://launchpad.net/gdb-linaro
-- Michael
Hi all,
I was wondering someone knows about a ARM DCC (debug
communications channel) device driver.
The idea is to run gdbserver on /dev/dcc such that application
debugging does not hog a serial/ethernet port.
I'd modify OpenOCD to forward the DCC onto a TCP/IP port
to connect GDB to the gdbserver.
--
Øyvind Harboe
US toll free 1-866-980-3434 / International +47 51 63 25 00
http://www.zylin.com/zy1000.html
ARM7 ARM9 ARM11 XScale Cortex
JTAG debugger and flash programmer
(cc'ed to linaro-toolchain, bcc'ed to others who may be interested)
I'm considering adding a new Linaro Toolchain meeting to cover people
in the North/South American timezones. We've got quite a few people
in that area who are interested in the toolchain but can't make the
current 0900 UTC calls.
How about a weekly half-hour call on Wednesdays at 1800 UTC? Once
daylight savings drops out on the 7th of November, this would be 1000
Sacramento/PST, 1200 Houston/CST, and a reasonable evening time for
those in Europe who wish to join.
This will be a technical call and can cover topics such as status
updates, release plans, reported problems, and any input from
toolchain users.
Please send me an email if you are interested,
-- Michael
Hi Marcin. Would you consider passing
--enable-poison-system-directories to the cross compiler configure?
This makes the '-Wpoison-system-directories' option available which
warns you if the cross compiler picks up a library or header file from
/usr instead of the cross-build environment.
I'm talking with someone who's looking at using the Linaro compiler
and had a strange error due to picking up the host crtn.o. Having
this warning would of tracked down the problem faster.
-- Michael
I believe that the libgcc.a in our toolchain contains Thumb-2 code. I
verified this by doing objdump on libgcc.a and I see combinations of
16 and 32 bit instructions. So does that mean that the toolchain is
only usable for ARM versions that support Thumb-2?
Thanks,
John
As discussed in the meeting yesterday, CodeSourcery has a few MinGW
patches that I had not merged into Linaro GCC.
I have now investigated these patches, and I'm fairly happy that most
are not necessary for Linaro. They're mainly about interworking with Cygwin.
The one exception is this one:
http://gcc.gnu.org/ml/gcc-patches/2010-04/msg01214.html
(and even that is primarily a GDB issue).
Andrew
I made a patch for ltrace that adds support for Thumb-2. There's not
much to it, but it allows me to trace applications built for Cortex-A8.
Without it, users will experience this bug:
https://bugs.launchpad.net/ubuntu/+source/ltrace/+bug/639796
Unfortunately, it appears that the upstream tree is not well-maintained.
I posted it to the mailing list for the project, but others' patches
have been ignored for many months. However, my post precipitated another
contributor to offer to maintain the package.
I also posted this patch as the proposed solution for the above LP bug,
which should allow Linaro to benefit from the work without worrying
about upstream. In fact, a new version of the package appears to have
been released that includes my patch (0.5.3-2ubuntu6). Please give this
updated package a whirl and let me know if there is more work to be done.
Thoughts? Unless I hear feedback from others, I will assume that this
tool now works for Cortex-A[89] and move on to other tasks.
--
Zach Welch
CodeSourcery
zwelch(a)codesourcery.com
(650) 331-3385 x743
(this is for current Toolchain WG members. Sorry if I got anyone
else's hopes up)
We'll soon be coming into some decent dual-core Cortex-A9 boards that
have 1 GB of RAM and a good set of USB ports. I've asked for four of
them with hard drives to go into the data centre for general use.
Would anyone also like one for their desk? Note that you're generally
better off using a data centre board as it's one less thing to
maintain.
-- Michael
Hi
I finally built armel cross compiler packages for Ubuntu 10.04 'Lucid' LTS.
They are available in unsigned APT repository:
deb http://people.canonical.com/~hrw/ubuntu-lucid-armel-cross-compilers/ ./
They are built from Maverick packages:
- binutils-source
- eglibc-source
- gcc-4.4-source
- gcc-4.5-source
- linux-source-2.6.35
- armel-cross-toolchain-base
- gcc-4.4-armel-cross
- gcc-4.5-armel-cross
So they do not give exactly same versions as compilers used in 10.04 - please
remember about it while doing cross builds.
Regards,
--
JID: hrw(a)jabber.org
Website: http://marcin.juszkiewicz.com.pl/
LinkedIn: http://www.linkedin.com/in/marcinjuszkiewicz
