arm October 2010

arm@lists.fedoraproject.org

10 participants
6 discussions

Fedora ARM 12 on IGEPv2 (Beagle Board clone)
by Matthew Wilson 01 Jan '16

01 Jan '16

Hi all, I would like to introduce myself to the group. I have recently received an IGEPv2 board [1], which is based on the Beagle Board, but with wifi, bluetooth, ethernet, and more RAM. I'm still at the "wow, it's tiny and it runs Linux" stage. I should get a bit more time over the next month and Christmas to play around properly with it. I'm new to embedded development, but neither new to Linux nor ARM (writing my first ARM assembly some 15 years ago). However, for the past 6 years I've not even built a Linux kernel, preferring to use the default kernel in Fedora for simplicity :) Firstly, a thank you to those involved in Fedora ARM for getting it to this stage. If I get the time, I'd really like to contribute some (probably small) effort to help get Fedora ARM working well on the IGEPv2 and Beagle Board. As I progress, I'd like to know what I can do to help. In the meantime, I have some questions. Apologies in advance if these seem simple. 1) There are various different kernels from different sources. I'm used to there being a small set of "right" kernels (that is, Fedora's idea of "right") for x86. I fully appreciate that different ARM-based boards are quite different in capabilities (like different instruction set variants). a) Is there likely to be some standardised vanilla Fedora ARM kernel source? (Or is that simply the source RPM available for Fedora?) Then patches /could/ be offered for the more common systems (e.g. Beagle Board & clones, SheevaPlug). b) Would it then make sense to offer these as pre-built RPMs for common systems? c) Is there any guidance on which version is good to use as a base? I've seen quite different kernel versions being used (from 2.6.27 to 2.6.31). 2) I understand a little bit about the different calling conventions, FP differences (e.g. soft FPU versus VFP), and instruction set differences (v5 versus v7). a) Can the kernel can be safely built with a different instruction set targeted? (I know there are different optimisation options passed to GCC. Apologies if this seems a bit newbie-ish.) b) For FP-heavy programs (e.g. ogg encoding), is it possible to build the packages with VFP/NEON but still get them to work in a soft FPU system? I'd imagine any call to an external library would have to somehow be defined to use a different calling standard. 3) There seem to be some missing dependencies in the packages in the current Fedora ARM repository. For example, emacs is requiring libotf, which doesn't seem to be there in the repository. And likewise with the xorg-x11-font* packages needing ttmkdir. I'm confused as to how the RPM could have been successfully built without it. What am I missing? 4) I see there has been some discussion over unaligned data access. (Oh, I remember that from the ARM2 days.) It seems as if the Cortex-A8 cores allow unaligned data access when set up to do so [2]. Does this, in any way, help with the compatibility of packages targetting Cortex-A8? 5) I've managed to get various source packages missing from the Fedora ARM repositories to compile successfully (natively). I guess there is a reason why there are not in the repos right now -- is that reason down to time and priorities, or is there some blocking bugs with many of these packages? I look forward to being able to contribute something back into Fedora! Kind regards, Matthew [1] http://www.igep-platform.com/index.php?option=com_content&view=article&id=4… [2] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0344j/Beihgi…

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Re: [fedora-arm] Guruplug | uaputl fail
by Martin Stadtler 01 Nov '10

01 Nov '10

Mine is on order, with specific intent to use the WLAN so this thread has my full attention. More than happy to pitch in once mine comes in. Martin Stadtler Red Hat Inc. 240.813.0122 -----Original Message----- From: Bernhard Schuster [schuster.bernhard(a)googlemail.com] Received: 8/19/10 1:07 PM To: Jon Hermansen [jon.hermansen(a)gmail.com] CC: Fedora ARM secondary architecture list [arm(a)lists.fedoraproject.org] Subject: Re: [fedora-arm] Guruplug | uaputl fail Other question, did any one else ever try toget wlan workin on GuruPlug Server? Success? fail? Regards Bernhard

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Fedora ARM? Storcenter ix-200
by Frank Murphy 26 Oct '10

26 Oct '10

Hi list, Have discovered with the help of a hackerspace group that my StorCenter ix-200 http://tinyurl.com/27tegxl has Debian 5 under the hood, with some Vendor firmware bits invloved. # uname -smr Linux 2.6.22.18 armv5tejl Would it be possible to convert to Fedora? Only have a lan connection to it. -- Regards, Frank Murphy UTF_8 Encoded Friend of Fedora

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hardfp support
by Dennis Gilmore 26 Oct '10

26 Oct '10

Id like to have us look at what we need to do to support both software floating point and hardware floating point support. I had been under the impression that all we would need to do is to build glibc with hardfp support. however that may not be the case. and we may need to build everything with hardfp support. this is just to get discussion rolling Dennis

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New glibc-2.12 lead
by Rich Mattes 20 Oct '10

20 Oct '10

Hi all, I chrooted into a failed glibc mockbuild and ran "make" again in the glibc build directory to get the gcc incantation for libanl.so that has been causing the glibc build to fail[1]. The beginning of the several-lines-long gcc command looks like: gcc -shared -static-libgcc -Wl,-O1 -Wl,-z,defs -Wl,-dynamic-linker=/lib/ld-linux.so.3 If you remove the "-static-libgcc" flag from the gcc command, libanl.so is able to build successfully. I don't know why libgcc_eh.a's __stack_chk_guard isn't resolved by the definition in /lib/ld-linux.so.3, but the problem can apparently be sidestepped by removing "-static-libgcc" from the equation entirely. I figured I'd share my findings in case someone knows how to get around this from within the makefiles. I'm still hacking at it, but I haven't gotten anywhere yet. Rich [1]: http://fpaste.org/uBaB/

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QEMU with libvirt - Did not find pci.0 bus for lsi53c895a
by Saleem Ansari 07 Oct '10

07 Oct '10

Hi, I am running a Fedora ARM VM using Virtual Machine Manager. I had followed the steps described http://fedoraproject.org/wiki/Architectures/ARM/HowToQemu#Using_QEMU_with_l… I am getting the following error when I run it and the VM doesn't start: Error starting domain: internal error process exited while connecting to monitor: bus "pci.0" not found Did not find pci.0 bus for lsi53c895a Any ideas? /tuxdna

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arm October 2010