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ChadJoan
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Joined: 17 Oct 2010
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 Posted: Mon Aug 29, 2016 2:55 pm Post subject: [SOLVED] How do I merge grub-2 with libzfs USE flag? |
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Hello,
I am trying to merge sys-boot/grub:2 with the libzfs USE flag, but portage seems to think otherwise. It goes like this:
| Code: | (chroot) livecd / # emerge -av sys-boot/grub:2
* IMPORTANT: 12 news items need reading for repository 'gentoo'.
* Use eselect news read to view new items.
These are the packages that would be merged, in order:
Calculating dependencies... done!
[ebuild N ] sys-libs/efivar-0.21-r99::musl 66 KiB
[ebuild N ] media-libs/libpng-1.6.21:0/16::gentoo USE="-apng (-neon) -static-libs" 922 KiB
[ebuild N ] media-libs/freetype-2.6.3-r1:2::gentoo USE="adobe-cff bzip2 png -X -bindist -debug -doc -fontforge -harfbuzz (-infinality) -static-libs -utils" 1712 KiB
[ebuild N ] sys-apps/pciutils-3.4.1::gentoo USE="kmod udev zlib -dns -static-libs" 395 KiB
[ebuild N ] sys-boot/efibootmgr-0.12::gentoo 35 KiB
[ebuild N ] sys-boot/grub-2.02_beta2-r9:2/2.02_beta2-r9::gentoo USE="fonts themes -debug -device-mapper -doc -efiemu (-libzfs) -mount -multislot -nls -sdl -static {-test} -truetype" GRUB_PLATFORMS="efi-64 -coreboot -efi-32 -emu -ieee1275 -loongson -multiboot -pc -qemu -qemu-mips -uboot -xen" 7402 KiB
Total: 6 packages (6 new), Size of downloads: 10531 KiB
Would you like to merge these packages? [Yes/No] n
Quitting. |
In my /etc/portage/package.use/package.use file I have "sys-boot/grub:2 -device-mapper libzfs".
It still writes "(-libzfs)" instead of accepting the USE flag. I have also tried this with the beta3 version of grub2, and that gives me the same results.
Here is my emerge --info:
http://pastebin.com/5F2M76GW
I am using a hardened/linux/musl/amd64 profile, incase that matters.
Thanks!
Last edited by ChadJoan on Mon Sep 05, 2016 11:40 pm; edited 1 time in total |
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fedeliallalinea
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| Posted: Mon Aug 29, 2016 3:31 pm Post subject: |
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if a use flag is in brackets means that are masked. For some reason developers have masked this use flag
| package.use.mask wrote: | # Mike Gilbert <floppym@gentoo.org> (29 Jun 2012)
# sys-fs/zfs is not available everywhere.
sys-boot/grub libzfs |
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ChadJoan
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| Posted: Mon Aug 29, 2016 6:00 pm Post subject: |
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OK.
How do I find out where it is masked?
Does it have a message I can read to learn more about the reason behind the masking?
How do I unmask it?
Sorry if these seem obvious; I haven't been able to find any documentation on this, and while I've dealt with plenty of masked packages, I've never seen masked USE flags before.
I looked at the ebuild(s) for grub and couldn't find anything to indicate that the libzfs flag is being masked or why, so I assume this status is applied elsewhere.
Thanks! |
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John R. Graham
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| Posted: Mon Aug 29, 2016 6:38 pm Post subject: |
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| ChadJoan wrote: | | ...How do I find out where it is masked? ... |
Search /usr/portage/profiles:- /usr/portage/profiles/base/package.use.mask applies the mask.
- /usr/portage/profiles/arch/amd64/package.use.mask selectively removes it for the amd64 profile.
Profile masks like this are for when things really don't work. Also, since you have this mask, you must be working on a 32-bit install. Is the hardware that old or do you have some specific reason for doing a 32-bit install on newer hardware? ZFS is known to not play very well on 32-bit systems so, although I didn't know about it, it doesn't surprise me.
You'll find brief documentation on modifying the profile settings in the Advanced chapter of the Handbook.
- John
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Last edited by John R. Graham on Mon Aug 29, 2016 6:40 pm; edited 2 times in total |
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fedeliallalinea
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| Posted: Mon Aug 29, 2016 6:39 pm Post subject: |
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| ChadJoan wrote: | | How do I find out where it is masked? |
Use flags masked are bound with profile you use. You can find with
| Code: | | $ find /usr/portage/profiles/ -name use.mask |
In the caso of libzfs file with masked use flag is /usr/portage/profiles/base/use.mask
| ChadJoan wrote: | | Does it have a message I can read to learn more about the reason behind the masking? |
On bugs.gentoo.org there is nothing, try send an email to developer (in this case Mike Gilbert <floppym@gentoo.org>).
| ChadJoan wrote: | | How do I unmask it? |
| Code: | # echo "-libzfs" >> /etc/portage/profile/use.mask
# echo "sys-boot/grub libzfs" >> /etc/portage/package.use |
But I think is not a good idea until you don't know why is masked
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ChadJoan
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| Posted: Mon Aug 29, 2016 9:18 pm Post subject: |
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Thank you both for pointing me to /usr/portage/profiles.
I did not know this was a profiles specific thing.
John, I am actually working on a 64-bit install. You are right, I really want to avoid running 32-bit stuff if I can help it  Check my posted "emerge --info" if you don't believe me.
If I understand the "parent" file in these profiles correctly, then "hardened/linux/musl/arm64" is getting the libzfs mask from "hardened/linux/musl" which is getting the libzfs mask from "base".
fedeliallalinea, thank you for laying it all out.
I see now that this USE mask is defined like so:
| Code: | # Mike Gilbert <floppym@gentoo.org> (29 Jun 2012)
# sys-fs/zfs is not available everywhere.
sys-boot/grub libzfs |
As it seems you discovered, this message doesn't mean much to us 
If it were a dependency problem (ex: zfs is not available on every system, but we depend on it), then I would expect the devs to just let Portage's dependency analysis figure out the situations where zfs is not usable on a system and halt in those cases, while letting everyone else build libzfs grub unimpeded. So perhaps Mike meant something else by "not available everywhere".
I think you are right, I will have to bug Mike about it.
Thank you for showing me how to unmask it. I think I tried /etc/portage/use.mask before, but maybe the /profile/ part of that path is important (and I didn't know before that this was a profile-specific feature). I will try to figure out why it's masked before resorting to this, though.
I will try to post again when I figure out why this USE mask is in place. |
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ChadJoan
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| Posted: Mon Sep 05, 2016 11:40 pm Post subject: |
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Grub2 with the libzfs USE flag totally works.
I emailed Mike on Monday (2016-Sep-29) and haven't heard anything back. So this weekend I decided to unmask the USE flag and I got the machine booting.
I suspect that the mask might be outdated at this point.
I had far more troubles getting the kernel itself to boot, but that's another story. In summary, I tried hard to avoid the initrd (*sigh* the initrd won) and was missing a graphics module in my kernel, so most of my booting experiments ended in a hang/freeze at "loading Linux <kernel name> ...". That's one way to spend a weekend |
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ChadJoan
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| Posted: Mon Sep 05, 2016 11:54 pm Post subject: |
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By the way, this bugzilla entry involved grub and zfs problems, as well as Mike:
https://bugs.gentoo.org/show_bug.cgi?id=404013
Maybe these issues had something to do with this USE flag getting masked.
It's really hard to find that entry for some reason. I'm not sure how I came across it originally, but it's probably a good thing that I saved it.
In my case, I did not experience any constructor recursion. Yay. |
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