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-YoctoAutoBuilder- build #43 of poky-tiny is complete: Success [build successful] Build details are at http://autobuilder.yoctoproject.org:8011/builders/poky-tiny/builds/43 | 06:33 | |
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ak77 | hello. | 07:42 |
---|---|---|
ak77 | is there a way to compile qt console application, and not import whole qt4x11 ? | 07:42 |
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LetoThe2nd | ak77: have you looked into the qt4e examples? | 07:45 |
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ak77 | LetoThe2nd: where would that be? (looking in /yocto/poky/meta/recipes-qt/) | 07:49 |
LetoThe2nd | ak77: ./meta/recipes-qt/images/qt4e-demo-image.bb | 07:50 |
LetoThe2nd | and whatever it pulls in, of course. | 07:50 |
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kbart | Can somebody please tell me, what's wrong with this line: SRC_URI = "git@192.168.4.35:kernel;protocol=git"? | 08:19 |
kbart | I get an error: MalformedUrl: The URL: 'git@192.168.4.35:kernel;protocol=git' is invalid and cannot be interpreted | 08:19 |
kbart | I've tried "protocol=ssh", but it's still the same | 08:20 |
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erbo | kbart: I think you should have a / instead of : after the ip/host, try git@192.168.4.35/kernel;protocol=git" | 08:25 |
erbo | and protocol ssh if that's what you want | 08:25 |
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kbart | erbo, still the same. But if I do "git clone git@192.168.4.35:kernel" manually, it works perfectly.. | 08:33 |
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erbo | kbart: oh, you miss the git:// in the beginning | 08:34 |
erbo | SRC_URI = "git://git@....." | 08:34 |
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kbart | Ah, that was it! Thank you erbo. | 08:37 |
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-YoctoAutoBuilder- build #41 of nightly-fsl-arm-lsb is complete: Success [build successful] Build details are at http://autobuilder.yoctoproject.org:8011/builders/nightly-fsl-arm-lsb/builds/41 | 08:42 | |
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-YoctoAutoBuilder- build #42 of nightly-fsl-arm-lsb is complete: Failure [failed Building Images Building Images_1 Building Images_2 Publishing Artifacts] Build details are at http://autobuilder.yoctoproject.org:8011/builders/nightly-fsl-arm-lsb/builds/42 | 09:18 | |
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bluelightning | morning all | 09:34 |
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-YoctoAutoBuilder- build #42 of nightly-fsl-ppc is complete: Failure [failed Building Images Building Toolchain Images Building Toolchain Images_1 Publishing Artifacts] Build details are at http://autobuilder.yoctoproject.org:8011/builders/nightly-fsl-ppc/builds/42 | 10:13 | |
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oswin | Hi, does anyone use icecc with yocto ? | 10:19 |
bluelightning | oswin: I think JaMa has been or at least knows people who have | 10:19 |
bluelightning | actually I'd be interested to know what the performance benefits of using it are (i.e. numbers) especially with the new blacklisting | 10:20 |
oswin | bluelightning, I've heard that is wasn't that advantageous, but in which case and with how many computer, I don't know... | 10:23 |
bluelightning | oswin: I'd heard the same in the past, in that the overhead of sending out the compile jobs meant that there wasn't much of an improvement; however nobody has come up with any numbers recently | 10:24 |
bluelightning | I have to assume that people who are using it have measured the improvement :) | 10:24 |
oswin | I hope so ^^ | 10:24 |
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linu | hi all i have been using poky with meta-atmel and when i try to load multi gadget,it shows the following error http://pastebin.com/ktV8LjUT can you tell me what is that issues | 10:28 |
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mckoan | good morning | 10:37 |
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gagi | oswin: the last time i tried it with about 40 cores the benefit was perhaps getting 1/3 - 1/4 less buildtime | 10:39 |
gagi | oswin: but that was almost a month ago | 10:40 |
oswin | gagi, did you put the scheduler on the fastest computer ? | 10:44 |
gagi | oswin: yes, we are using icecc for almost all of our non-yocto builds in our office and it runs on a 8-core xeon server | 10:45 |
oswin | gagi, and what's the usual benefit ? 1/2 ? | 10:46 |
gagi | oswin: i think the problem is/was that many packages don't accept the parallel build | 10:46 |
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gagi | oswin: it depends on how many machines you have, i would say > 1/2 | 10:47 |
oswin | gagi, (i mean on non yocto) | 10:47 |
oswin | gagi, ok good, thanks! | 10:47 |
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-YoctoAutoBuilder- build #42 of nightly-x32 is complete: Success [build successful] Build details are at http://autobuilder.yoctoproject.org:8011/builders/nightly-x32/builds/42 | 11:09 | |
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JaMa | oswin: bluelightning: yes I don't use it personally, because I work from home, but people in office are using that | 11:54 |
JaMa | oswin: bluelightning: with a lot of computers connected to icecc and very big builds it gets really useful, building qt with -j 150 is a lot faster :) | 11:55 |
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-YoctoAutoBuilder- build #43 of minnow is complete: Success [build successful] Build details are at http://autobuilder.yoctoproject.org:8011/builders/minnow/builds/43 | 12:04 | |
bluelightning | JaMa: right, with monsters like qt and webkit there ought to be some pretty big gains | 12:06 |
bluelightning | JaMa: btw, among other things Scott has just documented icecc.bbclass in the manual; perhaps I should get him to add a hint or two like that as well | 12:07 |
bluelightning | http://www.yoctoproject.org/docs/1.6/ref-manual/ref-manual.html#ref-classes-icecc | 12:07 |
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ak77 | I had working recipe with some compilation and installation. Then I added a single file I want to get deployed to the device (http://pastebin.com/xtKvvs8k) for this extra file it claims it was isntalled but not shipped, any clues? | 12:13 |
JaMa | bluelightning: I have few comments, is there open bug for this or can I say them here and you'll proxy them? | 12:14 |
bluelightning | JaMa: I can proxy them, but it may be better for you to email to scott directly about it (cc me if you like) | 12:15 |
JaMa | ack | 12:15 |
bluelightning | JaMa: I think he prefers srifenbark at gmail.com FYI | 12:16 |
bluelightning | ak77: basically you need to add something appropriate to FILES so that the additional file gets picked up | 12:17 |
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bluelightning | ak77: and put into the appropriate package (probably the main package, so I'm guessing you want FILES_${PN} += "${base_libdir}/firmware/" ) | 12:18 |
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JaMa | bluelightning: ups already sent to intel.com, but will bounce | 12:24 |
ak77 | bluelightning: that did the trick.. but what added compiled file implicitly to FILES ? | 12:24 |
bluelightning | ak77: there's a default value for FILES for a number of standard packages in PACKAGES; these are set in meta/conf/bitbake.conf | 12:25 |
ak77 | bluelightning: i see. thank you. | 12:26 |
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ak77 | bluelightning: i have another problem with that recipe, if you can take a look... do_rootfs fails due to bluez4 (>= 4.101) dependancy (i use bluez5), where does that dependancy come from? | 12:28 |
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-YoctoAutoBuilder- build #44 of nightly-mips is complete: Failure [failed Building Toolchain Images Building Toolchain Images_1 Publishing Artifacts] Build details are at http://autobuilder.yoctoproject.org:8011/builders/nightly-mips/builds/44 | 12:48 | |
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ak77 | :/ | 12:58 |
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Denwid | Hi everyone. I really can't figure out how to use PREMIRRORS to circumvent our firewall. The problem is git. PREMIRRORS_prepend = "git://.*/.* http://git.yoctoproject.org/git/ \n" does not work. I would like to just set protocol=http for all the git:// repos. Is this not possible? | 13:11 |
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ak77 | my recipe compiles .c files and has -lbluetooth, where does information which package provides this library is hold? generated? | 13:28 |
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ak77 | it keeps pulling bluez4, altough i have bluez5, which provides same library (libbluetooth.so.3) | 13:30 |
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bluelightning | ak77: well, when your application is being packaged the system will just look at what libraries it links to and then what package(s) those libraries are provided by, and set the dependencies accordingly | 13:33 |
bluelightning | ak77: if you have bluez4 in your sysroot (because you built it at some point before), or it's linking to bluez4 from the host, you can get problems like the one you are having | 13:34 |
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Xz | hi there | 13:57 |
Xz | trying to send a patch to openembedded-core | 13:57 |
Xz | using git send-email | 13:57 |
Xz | However i'm being given a response 'the mailinglist requires people to subscribe before posting' :| | 13:58 |
Xz | I'm subscribed | 13:58 |
rburton | Xz: your mails are not coming from the email that is subscribed | 13:58 |
rburton | (my .gitconfig sets my from address) | 13:58 |
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Xz | rburton: I have exactly same address in git | 14:00 |
Denwid | Xz: use git format-patch and send the email with your email client to check if that works | 14:03 |
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vicenteolivert | Hello. | 14:07 |
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Denwid | With yocto 1.4 there seem to be http mirrors out of the box for everything but yocto 1.5 doesn't work behind the firewall, nothing but trouble with some packages... | 14:08 |
vicenteolivert | Is there a way to build only the rootfs and not the rootfs + kernel? | 14:10 |
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Xz | there must be somethig wrong with my git configration | 14:12 |
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ak77 | bluelightning: i'm not linking to bluez4 from the host, where is this sysroot, and how can I rebuild it completly | 14:16 |
Xz | I have user.email and sendemail.from set to my email which is subscribed (tried subscribing again - message back, that I'm already subscribed) | 14:17 |
Xz | still cannot send email from git | 14:17 |
Xz | I must be missing some other settings maybe? | 14:17 |
Xz | git version 1.7.12.2 | 14:18 |
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bluelightning | ak77: you shouldn't need to rebuild it completely; if bluez4 has been built cleaning it out would just be a matter of bitbake -c clean bluez4 | 14:59 |
bluelightning | ak77: the sysroot is at tmp/sysroots/<machinename>/ | 14:59 |
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Leo___ | Hi, quick question. I'm trying to compile fsl-image-gui for freescale imx53qsb, but it fails with "ERROR: Task 437 (/media/yocto/yocto/poky-dora-10.0.0/fsl-community-bsp/sources/poky/meta/recipes-qt/qt4/qt4-x11-free_4.8.5.bb, do_compile) failed with exit code '1'" Any tips on where to go from here? | 15:18 |
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bluelightning | Leo___: can you pastebin the full error? | 15:21 |
Leo___ | blue lightning, yea of course, one second | 15:21 |
ak77 | bluelightning: thank you | 15:22 |
Leo___ | http://pastebin.com/ff4fDeHe | 15:23 |
Leo___ | hope this is what you need, just started out playing with all this today | 15:24 |
bluelightning | Leo___: that is an odd error, I haven't seen that before | 15:27 |
Leo___ | bluelightning: Ah, just my luck haha. should i file a bug report somewhere? | 15:28 |
bluelightning | Leo___: well, I'd suggest maybe asking about this on the meta-freescale mailing list | 15:28 |
bluelightning | the first error is definitely specific to meta-fsl-arm | 15:28 |
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Leo___ | bluelightning: ok, will do. thank you | 15:29 |
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Xz | Denwid: I tried using email as well - the same problem | 15:35 |
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weebet | Hello I would like to understand a little something before digging in the creation of one recipe. My custom software needs the library libpq (from postgresql 9.2 which is not yet available in yocto/open embedded) and libpqxx (which is also not available). To compile my software in bitbake system do I need to add recipe for libpqxx and postgresql or as soon as those library are available on my | 15:54 |
weebet | local system it will compile correctly ? | 15:54 |
ndec | weebet: you need recipe for your dependencies. | 15:55 |
ndec | the build won't use any 'local' libraries, without doing very dirty hacks... | 15:55 |
weebet | ndec : thank you . this is bad news, I tried to create recipe for postgresql but I was not able to be successfull to create the recipe. | 15:55 |
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bluelightning | weebet: there is a postgresql 9.2 recipe btw: http://layers.openembedded.org/layerindex/branch/master/recipes/?q=postgres | 15:56 |
ndec | i was about to say the same thing ;-) | 15:56 |
weebet | I am surprised, the last time I have looked, it was for 8.4 or something like this | 15:56 |
bluelightning | looking at the git history it was upgraded in August of this year | 15:57 |
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weebet | Great :-) Thank you | 15:58 |
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weebet | I would have another question, when I log onto poky, it will only take care of the 8 first character. is there any plan to solve this issue ? I have seen that there were a lot of patch to apply to solve this, but never found any howto to correct this. | 16:00 |
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erbo | I noticed that module_strip.bbclass is empty, is there some other way to make sure kernel modules are stripped? | 16:05 |
jkridner | 19 degrees here. ;-) | 16:06 |
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kergoth | erbo: iirc its automatically handled by package.bbclass now, nothing you need to do | 16:06 |
kergoth | afaik anyway | 16:06 |
* Crofton|work curses kit kat and bluetooth headset | 16:07 | |
Crofton|work | ah turning it on is a big help | 16:07 |
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bluelightning | erbo: coincidentally I'm about to send a patch to drop that empty class | 16:09 |
zibri | rp: i believe i just found another bug, thanks to the verify commit on branch change. git ls-remote <url> <tag> lists both refs/tags/<tag> and remotes/head/foo/bar/<tag>. do you have any ideas on how to solve that? | 16:12 |
erbo | kergoth: I'll have to look through package.bbclass, because my modules are not stripped :) | 16:13 |
zibri | i.e., when what i was looking for was the sha1 of refs/tags/<tag>, instead i get back the sha1 of some random branch that happens to end with the same string as the tag i was looking for. | 16:13 |
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RP | zibri: hmm, that could be quite nasty :/ | 16:14 |
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bluelightning | weebet: it seems you just need to set ENCRYPT_METHOD in /etc/login.defs | 16:18 |
bluelightning | I wonder if there's a good reason why we don't do that by default... | 16:18 |
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weebet | Thank you bluelightning | 16:19 |
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kergoth | zibri: git ls-remote <url> refs/tags/<tag> | 16:21 |
kergoth | afaik that should work fine, no? | 16:21 |
Crofton|work | http://stackoverflow.com/search?q=yocto | 16:21 |
Crofton|work | http://stackoverflow.com/search?q=openembedded | 16:22 |
kergoth | oh, i'm guessing in this case it's from srcrev, so we don't know what it's referring to? | 16:22 |
zibri | kergoth: yes, indeed. but this is in the git fetcher. i'm not sure that change is fine there | 16:22 |
zibri | but maybe try that first, if nothing comes out, try refs/head/<string>. | 16:22 |
zibri | refs/heads/<string> even | 16:23 |
kergoth | hmm yes, thats's an idea | 16:23 |
zibri | not the prettiest, i'll admit :/ | 16:23 |
kergoth | not many other options if the user gives us something ambiguous, other than to just fail :) | 16:25 |
vicenteolivert | Is anyone else having problems with m4-native package? It always fails at configure phase for me. | 16:26 |
bluelightning | weebet: actually that only applies if you have "shadow" in your image; if you're using busybox's version of login/passwd then it should be supporting >8 char passwords out of the box | 16:26 |
rburton | vicenteolivert: pastebin the problem please | 16:26 |
vicenteolivert | configure: error: C compiler cannot create executables | 16:26 |
rburton | vicenteolivert: pastebin the config.log please :) | 16:26 |
vicenteolivert | Ok. | 16:27 |
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zibri | kergoth, rp: thanks for your input! i'll try to prepare a patch and send it tomorrow | 16:30 |
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vicenteolivert | rburton: http://www.pastebin.ca/2496272 | 16:32 |
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vicenteolivert | rburton: Ok, it's failing because the CFLAGS I have passed. But those CFLAGS should be valid... | 16:33 |
weebet | bluelightning : how to know if I use shadow / busybox ? also, I am not using the latest repo how to checkout only the postgresql recipe ? I tried to git clone git://git.openembedded.org/meta-openembedded/meta-oe/recipes-support/postgresql but I have a remote error: acces denied or repository not exported /meta-openembedded/meta-oe/recipes-support/postgresql | 16:34 |
sgw_ | Folks, can someone with a redhat bugzilla account see if they can access: https://bugzilla.redhat.com/show_bug.cgi?id=813070, we are seeing an userspace nfs readdir issue that is referenced in here possibly. | 16:34 |
yocti | Bug 813070: was not found. | 16:34 |
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vicenteolivert | rburton: it looks like it was compiling for i686 instead of mips. | 16:35 |
rburton | vicenteolivert: you did ask for m4-native | 16:35 |
rburton | or at least, it's building m4-native | 16:35 |
rburton | so where you specified those cflags, you need to use them for just target builds and not native | 16:35 |
bluelightning | weebet: git can't be used to fetch individual files like that, but you can fetch / check out the latest branch, copy the files out (or clone the repository again in a separate directory) | 16:36 |
vicenteolivert | rburton: I have specified those cflags in my local.conf | 16:36 |
vicenteolivert | rburton: is not correct? | 16:36 |
bluelightning | weebet: re shadow / busybox, you can do: ls -l `which passwd` | 16:36 |
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rburton | vicenteolivert: extend TARGET_CFLAGS so you're not changing native CFLAGS | 16:37 |
vicenteolivert | Ah... | 16:37 |
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weebet | bluelightning : no shadow in (... PATH ...) so I uses busybox | 16:37 |
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weebet | and when I do : passwd it tells me that the password must have minimum of 5, maximum of 8 | 16:38 |
weebet | I work with gumstix layer under danny. I guess I work with an old repo | 16:39 |
vicenteolivert | rburton: TARGET_CFLAGS_append = " -mmicromips -mno-jals" , is that the right way to do it? | 16:39 |
rburton | vicenteolivert: that should work. yeah. | 16:40 |
vicenteolivert | rburton: ok, thanks. I'll let you know if it works. | 16:40 |
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michael_e_brown_ | I NEED STICKERS! | 16:40 |
vicenteolivert | rburton: quick question. Is it possible to build only the rootfs image and not the kernel image? | 16:41 |
bluelightning | weebet: if it used shadow, it would definitely say /usr/bin/passwd -> /bin/busybox (or busybox.suid) | 16:41 |
bluelightning | weebet: er, I mean if it used busybox | 16:41 |
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weebet | "/usr/bin/passwd -> /bin/tinylogin" | 16:44 |
vicenteolivert | Or better..., is there a way to simply use my own ".config" file to build the kernel? | 16:44 |
bluelightning | weebet: ah of course, tinylogin | 16:45 |
rburton | vicenteolivert: you can build your own kernel if you don't like the yocto kernel config thing | 16:46 |
vicenteolivert | rburton: ok, but how can I avoid building the yocto kernel? | 16:46 |
rburton | vicenteolivert: i recommend getting yocto to build a kernel using your config | 16:47 |
bluelightning | weebet: in danny we used tinylogin , before we used busybox's integrated version of the same | 16:47 |
bluelightning | weebet: but it seems that behaved differently w.r.t encryption methods | 16:47 |
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bluelightning | weebet: to be honest I'm not sure how to fix that; you might try googling "tinylogin 8 character" or something like that | 16:49 |
weebet | Thank you bluelightning. I guess I will work to get the latest | 16:49 |
weebet | repo | 16:49 |
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Crofton|work | Jefro, ! | 17:12 |
michael_e_brown_ | OH NOES! | 17:12 |
vicenteolivert | rburton: despite of using TARGET_CFLAGS_append, eglibc-initial fails anyway: http://pastebin.ca/2496286 | 17:14 |
rburton | "mipsel-poky-linux-gcc: error: unrecognized command line option '-mmicromips'" | 17:15 |
rburton | are you sure you're using gcc options that the gcc you're building knows about? | 17:15 |
Crofton|work | hmm | 17:15 |
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Crofton|work | gah | 17:17 |
vicenteolivert | rburton: -mmicromips is a valig CFLAGS for a mips gcc. | 17:18 |
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rburton | vicenteolivert: well, clearly not for the gcc that it's running. | 17:20 |
vicenteolivert | rburton: I don't have any idea about how to fix that :S | 17:21 |
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rburton | vicenteolivert: http://gcc.gnu.org/onlinedocs/gcc-4.8.2/gcc/MIPS-Options.html#MIPS-Options says otherwise | 17:23 |
rburton | vicenteolivert: i'd guess those variables are mentor/cs specific | 17:25 |
rburton | (kergoth might know) | 17:25 |
kergoth | not sure offhand, would have to go pester the folks in that department | 17:27 |
rburton | vicenteolivert: so i'd guess either 1) patch your gcc 2) stop using those options 3) use mentor's toolchain layer | 17:27 |
vicenteolivert | Uhm... | 17:27 |
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vicenteolivert | I'll try removing those options first..., but I guess the board will not boot then. | 17:28 |
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* pidge is running the poky-contrib cleanup right now. any deleted branches will be in poky-contrib-archive | 17:38 | |
kergoth | nice | 17:40 |
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mr_science | okay, i see no openssh-server in oe-classic DISTRO_FEATURES | 17:54 |
mr_science | what's the proper way to punt dropbear in favor of openssh? | 17:54 |
mr_science | moin, btw... | 17:54 |
bluelightning | mr_science: OE-Classic questions should really be asked in #oe | 17:57 |
bluelightning | mr_science: good morning to you also :) | 17:57 |
mr_science | stupid default tab... | 17:57 |
mr_science | thanks | 17:57 |
kergoth | ... and the new fetch code explodes if you try to use a tag in SRCREV | 17:58 |
kergoth | this stupid branch check is really starting to get on my nerves | 17:58 |
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j8 | anybody use smart package manager? | 18:07 |
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j8 | i used smart to install a package. subsequent installs error out because e.g. libc6 "is already installed" | 18:11 |
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bluelightning | j8: that is very strange | 18:16 |
bluelightning | j8: is that something that would be easy for me to reproduce here? | 18:17 |
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j8 | bluelightning: i am on dylan. i installed base-files to test out a fix. that succeeded, so i tried installing packagegroup-core-boot which yielded the error | 18:24 |
bluelightning | j8: hmm, packagegroup-core-boot itself should already be installed, unless you're building a highly customised image (or you're upgrading...) | 18:25 |
j8 | bluelightning: yea, i'm doing this because i thought the image i got didn't have any smart package data | 18:29 |
bluelightning | j8: was package-management in IMAGE_FEATURES when this image was built? | 18:31 |
_tid | hello :) | 18:31 |
_tid | i was wondering if there was any way to include kernel modules into the ubi image ? | 18:31 |
pidge | ok, poky-contrib got a first pass cleaning. more cleaning in a bit. | 18:32 |
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j8 | bluelightning: i've got package-management in a IMAGE_FEATURES_append, so now i'm wondering if i'm doing it right | 18:39 |
bluelightning | j8: with a leading space in the value? | 18:40 |
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bluelightning | j8: turning this around, if you do "smart query --installed" does it actually show the full list of packages that should be installed on the system or just the few that were installed when you installed base-files? | 18:43 |
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j8 | bluelightning: can't say right now because i am hacking things right now. should i be seeing a /var/lib/smart directory in the built image? | 18:53 |
bluelightning | j8: you should yes | 18:55 |
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j8 | bluelightning: strange, i'm not getting anything in /var/lib/smart. should i be able to do IMAGE_FEATURES = "x11" and then IMAGE_FEATURES_append = " package-management" | 19:06 |
bluelightning | j8: you should yes | 19:07 |
bluelightning | j8: I'd try bitbake -e your-image | grep ^IMAGE_FEATURES= | 19:08 |
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j8 | bluelightning: IMAGE_FEATURES does have package-management | 19:16 |
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bluelightning | j8: does your image recipe inherit image or core-image? | 19:18 |
j8 | bluelightning: core-image | 19:18 |
bluelightning | j8: there isn't a line adding "remove_packaging_data_files" to ROOTFS_POSTPROCESS_COMMAND is there? | 19:19 |
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j8 | bluelightning: that line ended up in my *image*.bb - is that eliminating the smart metadata? | 19:20 |
bluelightning | j8: yes, it will be | 19:21 |
bluelightning | j8: you need to remove that | 19:21 |
bluelightning | mystery solved | 19:22 |
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Smitty | I'd be interested in learning more about Yocto, but I get put off by the naming that is used. What is Yocto, Poky, sato, etc, etc.. Why are these names being chosen, and what relevance do they have to what they identify | 23:12 |
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Smitty | Why is the QUick Start Guide such a jumbled mess of information | 23:12 |
Smitty | Should I really feel confident that anyone other than script kiddies are involved with this project ? | 23:13 |
kergoth | yocto is an umbrella project which includes many things, of which poky is one. poky is its buildsystem | 23:13 |
kergoth | did you not see all the major corporations which are members of yocto? | 23:13 |
kergoth | go look at the website | 23:13 |
Smitty | what do you mean build system ? You mean a replacement for unix make, or cmake ? | 23:13 |
kergoth | no, it's higher level than that. it builds an entire linux distribution, all the components involved, bootloader, kernel, gui, everything, giving you a filesystem/image to put on your device | 23:14 |
kergoth | it runs make under the hood to build individual components | 23:14 |
kergoth | (among other tools) | 23:14 |
Smitty | So, why is it called Poky ? | 23:14 |
kergoth | yocto is a metric prefix, indicating its use for small systems | 23:15 |
kergoth | no clue what poky originated from, personally | 23:15 |
kergoth | don't know, don't care | 23:15 |
Smitty | OK, so Poky is the build system, what's bitbake ? The executable that actually operates on "the build system" | 23:16 |
Smitty | In which case, why isn't the build system called bitbake ? | 23:16 |
kergoth | poky is yocto's buildsystem, it uses multiple open source components under the hood, of which bitbake is one | 23:18 |
kergoth | those components existed before yocto or poky, and are used by other projects than just poky | 23:18 |
kergoth | i'll admit it can be confusing, but the decisions weren't made randomly and without reason | 23:19 |
Smitty | OK, so let's start over. Poky is the build system, but it uses a variety of tools to accomplish the build. So, let's clarify what we mean by a 'build' I regard a build as the process of a 'make' like system working through a set of makefiles and executing toolchain commands such as compile, archive, strip, link, etc. | 23:21 |
Smitty | So, where does Poky and bitbake fit into that picture | 23:22 |
rburton | kergoth: poky is a sweet in japan | 23:24 |
kergoth | i already explained that. it builds an entire linux system for an embedded system | 23:24 |
rburton | (usually transliterated to pokey, iirc) | 23:24 |
kergoth | a linux distribution consists of a great deal of software, go read up on redhat and the like to get an idea of what all is involved | 23:24 |
Smitty | but so does make, or cmake. | 23:25 |
kergoth | it builds everything obeying their dependencies | 23:25 |
kergoth | no, they don't | 23:25 |
kergoth | well, in rare cases. buildroot is a make based system which is similar, but much less flexible | 23:25 |
kergoth | make is generally used to build one piece of software | 23:25 |
kergoth | not the hundreds of pieces of software involved in an entire linux distribution | 23:25 |
kergoth | every distro has their own high level tools for this | 23:25 |
kergoth | this is no different than those, other than goals and embedded focus | 23:26 |
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Smitty | so, Poky is the equivalent of something like 'standard' linux make menuconfig ? | 23:27 |
kergoth | no | 23:27 |
kergoth | make menuconfig is how you configure the build of a linux kernel | 23:28 |
kergoth | that's one of many components in a linux distribution | 23:28 |
kergoth | a kernel is just one small piece of a distro | 23:28 |
rburton | strictly speaking Poky is a reference distribution, showing how to assemble the pieces in Yocto (bitbake, oe-core, etc) into a distribution. | 23:28 |
kergoth | well put | 23:28 |
rburton | its also the distribution that Yocto does QA on | 23:28 |
rburton | bitbake is the tool that decides what to build, and how. | 23:29 |
Smitty | so bitbake is like cmake | 23:29 |
kergoth | no | 23:29 |
rburton | oe-core is the "core" metadata, linux, glibc, gcc, etc. | 23:29 |
kergoth | cmake is a buildsystem used to build a single piece of software, not unlike autoconf/automake/make/etc | 23:30 |
rburton | Smitty: its not a great comparison but bitbake/oe-core == make/makefiles | 23:30 |
kergoth | its similar, but at a different scope | 23:30 |
kergoth | what it does is similar, in that it runs tasks, obeying inter-task dependencies | 23:30 |
kergoth | but tools like make/cmake are oriented toward building individual source files. make is file-oriented | 23:30 |
Smitty | CMake, by reading CMakeLists.txt (and other cmake files) can build anything from a single object file to a library, a suite of libraries, or an entire distribution. It just depends upon how complicated you want it to be. How is that any different from bitbake | 23:31 |
rburton | Smitty: good luck building a distribution with cmake. | 23:31 |
rburton | Smitty: maybe you can - as kergoth said, the buildroot project builds distros using mostly Makefiles | 23:32 |
kergoth | again, its a matter of scope and focus. yes, its theoretically possible to build a distro with such tools, and i already pointed out one example of this, but they don't tend to scale well, nor are they as flexible | 23:32 |
kergoth | the reason we started openembedded and bitbake is that make was not doing the job | 23:32 |
rburton | Smitty: the difference to anyone who isn't a random hacker looking for a pet project is that bitbake exists, and lets-build-a-distro-using-cmake doesn't. | 23:33 |
rburton | anyway, it's just a tool, move on. | 23:33 |
rburton | next question? | 23:33 |
kergoth | if it doesn't meet your needs, there are plenty of alternatives, but this meets our needs, and that of many other companies. yocto is a way for those companies to work together on a solid well tested core for their distributions, so they can focus on what really differentiates them | 23:34 |
Smitty | OK, fine, I can understand that. I wouldn't want to try to build an entire distro with CMake, or make. So, Yocto provides the infrastructure and tools for building a distro. Poky is a reference distribution created by Yocto. | 23:34 |
rburton | yes | 23:35 |
rburton | there are plenty of others: angstrom is a popular example of a distro built using yocto pieces | 23:36 |
Smitty | bitbake is a tool which can process 'recipes' and construct a set of commands to compile, link, etc | 23:36 |
rburton | build file systems, construct package feeds, etc | 23:37 |
rburton | yep. | 23:37 |
Smitty | fine | 23:37 |
kergoth | each recipe tells it how to build a particular piece of software. glibc, busybox, bash, whatever. they define dependencies between them, so it can build them in the right order | 23:38 |
* rburton -> bed | 23:38 | |
kergoth | it's also capable of cross-compilation, which is an important feature | 23:38 |
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Smitty | what's what's the sato part of core-image-sato trying to convey ? | 23:39 |
kergoth | sato is a particular GUI environment. scroll down to SATO on http://www.pokylinux.org/about/ | 23:40 |
kergoth | gnome mobile based gui for embedded devices | 23:40 |
kergoth | one of many UIs which are used in embedded systems | 23:40 |
kergoth | see also http://blogs.gnome.org/thos/2007/08/01/sato-has-landed/ | 23:42 |
kergoth | (which was the original announcement, from ages ago) | 23:42 |
Smitty | so, core-image-sato shoudl perhaps be called sato-core-image, since the image contains sato on top of core. | 23:43 |
Smitty | Now, I get really confused by the quick start guide when I read this "By default, the target architecture for the build is qemux86, which produces an image that can be used in the QEMU emulator and is targeted at an IntelĀ® 32-bit based architecture" | 23:44 |
kergoth | it's a convention for all the core images to be named core-image-<thing> | 23:44 |
kergoth | minimal, base, sato, etc | 23:45 |
kergoth | as i mentioned, it can handle cross-compilation. that is, it targets a platform other than what you're running on | 23:45 |
kergoth | whether that's a beagleboard, minnowboard, some custom dev board, or whatevewr | 23:45 |
kergoth | the default config targets qemu, an emulation environment, so you can run it on your build machine under emulation | 23:45 |
Smitty | Why would I have to specify qemux86, and not just x86. Surely the target (x86) can run in any virtual machine which can host an x86. | 23:46 |
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kergoth | there is a generic x86 target available also. the qemu one will build a kernel configured specifically for use in qemu, with all the drivers that it emulates, and also builds the tools necessary to run the output of hte build, including qemu itself | 23:48 |
kergoth | and you don't have to specify it, qemux86 is default :) | 23:49 |
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Smitty | how does one target a virtual machine ? Surely you target a real architecture like x86, ARM, whatever | 23:50 |
kergoth | no, you specify a specific "machine", not a generic architecture | 23:50 |
kergoth | as i mentioned before, it builds the entire distro, including bootloader(s) and kernel | 23:50 |
kergoth | whch aren't generic | 23:50 |
kergoth | particularly in embedded | 23:50 |
Smitty | are you sayng that the compiler is emitting different instructions for qemu hosted x86 than for true x86 ? | 23:52 |
kergoth | that's not what i said, though it could be optimizing differently sure. the main thing i said was that the kernel was configured differently, among other things | 23:53 |
Smitty | there are kernel compile options for running within a virtual machine as apposed to native hardware ? | 23:54 |
kergoth | not generally, no, but what drivers are enabled can be different, as qemu only emulates certain hardware | 23:54 |
Smitty | OK, so really this qemux86 target is a subset of a generic x86 target I would imagine. | 23:55 |
kergoth | don't really know, i've never tested the generic x86 stuff, it's a relatively recent addition. embedded tends to be quite specific, not building generic kernels that work on any system, though that's changing somewhat | 23:56 |
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