Hi there. Linaro is about what's next and, as part of this, we should
backport any reasonable Cortex-A15 changes to our 4.6 branch.
Richard and Matthew, could you let us know directly when new patches
from ARM land upstream?
We're already doing this but I thought I'd say it out loud.
-- Michael
Hello,
I'm trying to build the Linaro GCC from source on an x86_64 Fedora 16 box.
I'm using as a guide a wiki entry I found in linaro.org site [1] that
explains how to build a native version of the compiler. But instead of a
native version I want to be able to cross-compile ARM binaries for my
target machine.
This is what I tried:
[javier@munra src]$ wget -c
http://launchpadlibrarian.net/86993387/gcc-linaro-4.6-2011.12.tar.bz2
[javier@munra src]$ tar xaf gcc-linaro-4.6-2011.12.tar.bz2
[javier@munra src]$ mkdir build && cd build
[javier@munra build]$ ../gcc-linaro-4.6-2011.12/configure
--target=arm-linux --disable-bootstrap --enable-languages=c
--prefix=/home/javier/tools
[javier@munra build]$ make -j4 && make install
But got this error:
make[2]: Leaving directory `/home/javier/src/build/gcc'
Checking multilib configuration for libgcc...
mkdir -p -- arm-linux/libgcc
Configuring in arm-linux/libgcc
configure: creating cache ./config.cache
checking for --enable-version-specific-runtime-libs... no
checking for a BSD-compatible install... /usr/bin/install -c
checking for gawk... gawk
checking build system type... x86_64-unknown-linux-gnu
checking host system type... arm-unknown-linux-gnu
checking for arm-linux-ar... arm-linux-ar
checking for arm-linux-lipo... arm-linux-lipo
checking for arm-linux-nm... /home/javier/src/build/./gcc/nm
checking for arm-linux-ranlib... arm-linux-ranlib
checking for arm-linux-strip... arm-linux-strip
checking whether ln -s works... yes
checking for arm-linux-gcc... /home/javier/src/build/./gcc/xgcc
-B/home/javier/src/build/./gcc/ -B/home/javier/tools/arm-linux/bin/
-B/home/javier/tools/arm-linux/lib/ -isystem
/home/javier/tools/arm-linux/include -isystem
/home/javier/tools/arm-linux/sys-include
checking for suffix of object files... configure: error: in
`/home/javier/src/build/arm-linux/libgcc':
configure: error: cannot compute suffix of object files: cannot compile
See `config.log' for more details.
make[1]: *** [configure-target-libgcc] Error 1
make[1]: Leaving directory `/home/javier/src/build'
make: *** [all] Error 2
Before trying to compile I've installed the libgmp, libmpfr and arm cross
tool-chain [2] Fedora packages so I guess all gcc dependencies are met
(binutils, glibc, etc).
Could someone be so kind to point me out what am I doing wrong? I'm sending
as an attachment the config.log generated file.
Please let me know if you need any more information about my setup and
environment.
[1]: https://wiki.linaro.org/WorkingGroups/ToolChain/Using/GCCNative
[2]: http://fedoraproject.org/wiki/Architectures/ARM/CrossToolchain
Thanks a lot and best regards,
Javier
I've taken a stab at the medium term requirements for KVM on ARM:
https://wiki.linaro.org/WorkingGroups/ToolChain/Specs/KVMEpic
I haven't looked outside Linaro so apologies if this overlaps with
other people's plans.
Peter, this is high level and hopefully matches what's in your head.
I want to use this to do a project plan, see if it can be done in 6-9
calendar months, and see if we need more people. Are there any
implementation details that we should call out, similar to calling out
virtio and UEFI?
Rusty, this should tell you more about where we're going.
Mounir, you, Peter, and I should turn this into a basic project plan.
-- Michael
Hi,
Does anyone have anything they'd like to bring up in tomorrow's
performance call. ? I don't have any topics other than following on
action items from last time's call - which was comparing movw/ movt
with constant pools .
https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2012-01-10
Please add to it as you deem fit.
cheers
Ramana
* Linaro
Continued work on getting GCC to build on LAVA. I've ironed out a few
more bugs from my test scripts, but it's slow going because a test runs
takes a long time to run, and there are very few useful error messages
when something goes wrong.
Wrote, posted, and committed a patch to fix the "120" testsuite bug I
encountered last month. Basically the GCC testsuite's "headmerge-1"
testcase would have failed from now until September because a sloppy
regex happening to match "120" in the toolchain version string's
snapshot date. I've also backported it to upstream 4.6 and posted a
merge request for Linaro 4.6.
Continued running benchmarks for the generic tuning project.
Continued looking at optimizing 64-bit shifts. No real progress this
week though.
* Other
Monday: Public holiday.
Tuesday: Vacation.
Caught up on a mountain of email.
Summary:
* Read armV7-A/R reference manual and analyze bugs.
Details:
* Read armV7-A/R reference manual and share the instruction set part
with local team.
* Analyze bugs: LP: #889985 "binaries: can't step out of helper
functions" and LP: #889984 "binaries: should step across helper
functions"
Plan:
* Ramp-up on gcc.
Planed leave:
* Jan 21 - 29: Chinese new year holiday.
Best regards!
-Zhenqiang
Hi there. I want each administrative task inside our group to have an
owner and a fill-in. I've started a list at:
https://wiki.linaro.org/WorkingGroups/ToolChain/Jobs
I took the chance to hand off some of my jobs as well so you might see
your name somewhere new (but hopefully not surprising).
I'll discuss this at tonight's meeting and in the 1-on-1s. Reply away
if you'd like more detail or have a task to add.
-- Michael
[short week, three days]
RAG:
Red:
Amber:
Green:
Current Milestones:
|| || Planned || Estimate || Actual ||
||cp15-rework || 2012-01-06 || 2012-01-17 || ||
||initial-a15-system-model || 2012-01-27 || 2012-01-27 || ||
||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| ||
(for blueprint definitions: https://wiki.linaro.org/PeterMaydell/QemuKVM)
Historical Milestones:
||a15-usermode-support || 2011-11-10 || 2011-11-10 || 2011-10-27 ||
||upstream-omap3-cleanup || 2011-11-10 || 2011-12-15 || 2011-12-12 ||
== other ==
* catchup on email, etc
* patch review: patches for Calxeda's Highbank SoC model
* put together pull requests for target-arm and arm-devs patchqueues
* rebased qemu-linaro, added patches for things we want to fix in 2011.01,
rolled a tarball, tested it and sent to Michael H for testing
Hi Ramana. You were right about being able to do operations on
intrinsic types. Instead of doing the admittedly made up:
int16x4_t foo2(int16x4_t a, int16x4_t b)
{
int16x4_t ca = vdup_n_s16(0.2126*256);
int16x4_t cb = vdup_n_s16(0.7152*256);
return vadd_s16(vmul_s16(ca, a), vmul_s16(cb, b));
}
you can do:
int16x4_t foo3(int16x4_t a, int16x4_t b)
{
int16x4_t ca = vdup_n_s16(0.2126*256);
int16x4_t cb = vdup_n_s16(0.7152*256);
return ca*a + cb*b;
}
which is more readable and, as an added bonus, generates the
multiply-and-accumulate that I missed when using intrinsics. Nice.
-- Michael
