[Buildroot] [PATCH next v4 0/6] Per-package host/target directory support

Andreas Naumann dev at andin.de
Mon Nov 19 14:17:41 UTC 2018


Hi Thomas,

Am 16.11.18 um 15:43 schrieb Thomas Petazzoni:
> Hello Andreas,
> 
> Thanks for your feedback!
> 
> On Thu, 15 Nov 2018 17:41:27 +0100, Andreas Naumann wrote:
> 
>> thank you for the updated version. I tried to run it with my configs.
> 
> Thanks a lot for testing!
> 
>> For that I needed
>> a) a generic patch for all kconfig packages, see my answer on the final
>> patch
> 
> For this one, we need to continue the discussion with Yann and Thomas
> De Schampheleire to understand what is the right approach.

Ok.

> 
>> b) linux-specific patch posted two days ago: [PATCH v2 1/1] linux: Make
>> dtc install step more reliable
> 
> This one is a package-specific fix, which can be merged separately from
> the core of the PPSH series. I want to keep the PPSH series focused on
> introducing PPSH support, and not make it grow infinitely with fixup
> patches for lots of packages.
> 
> However, perhaps what we could do is to collect those patches in
> branch, this way we could have two branches:
> 
>   - One with the PPSH core stuff
> 
>   - One with all the PPSH-related fixes, which are being
>     submitted/applied progressively to Buildroot, even before PPSH
>     itself is merged.
> 
> What do you think ?

Ok, but right now I have only this one additional patch.

> 
>> On my local machine things seemed to work, however final rootfs creation
>> failed in our CI environment due to broken host- binaries, e.g.
>> mkfs.ubifs not finding some required lib (liblzo2.so.2 in that
>> particular case).
>> It seems some things with rpath manipulation/checking do not yet work
>> properly. Looking into the binary with ldd I see libs used from the
>> host-machine that probably should come from buildroots host/usr/lib...
>> 	linux-vdso.so.1 =>  (0x00007ffc06fcc000)
>> 	libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f760428f000)
>> 	liblzo2.so.2 => not found
>> 	libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007f760408a000)
>> 	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f7603d81000)
>> 	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f76039b7000)
>> 	/lib64/ld-linux-x86-64.so.2 (0x00007f76044a9000)
> 
> This is weird, because it works fine here:
> 
> thomas at windsurf:~/projets/outputs/t$ ldd host/sbin/mkfs.ubifs
> 	linux-vdso.so.1 (0x00007ffe8cd3b000)
> 	libz.so.1 => /home/thomas/projets/outputs/t/per-package/host-mtd/host/lib/libz.so.1 (0x00007f1a683ff000)
> 	liblzo2.so.2 => /home/thomas/projets/outputs/t/per-package/host-mtd/host/lib/liblzo2.so.2 (0x00007f1a683db000)
> 	libuuid.so.1 => /home/thomas/projets/outputs/t/per-package/host-mtd/host/lib/libuuid.so.1 (0x00007f1a683d2000)
> 	libm.so.6 => /lib64/libm.so.6 (0x00007f1a6821e000)
> 	libc.so.6 => /lib64/libc.so.6 (0x00007f1a68058000)
> 	/lib64/ld-linux-x86-64.so.2 (0x00007f1a6841b000)
> 
> Could you dump the RPATH of the mkfs.ubifs library, like this:
> 
> thomas at windsurf:~/projets/outputs/t$ readelf -d host/sbin/mkfs.ubifs
> 
> Dynamic section at offset 0x11dd0 contains 29 entries:
>    Tag        Type                         Name/Value
>   0x0000000000000001 (NEEDED)             Shared library: [libz.so.1]
>   0x0000000000000001 (NEEDED)             Shared library: [liblzo2.so.2]
>   0x0000000000000001 (NEEDED)             Shared library: [libuuid.so.1]
>   0x0000000000000001 (NEEDED)             Shared library: [libm.so.6]
>   0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
>   0x000000000000000f (RPATH)              Library rpath: [/home/thomas/projets/outputs/t/per-package/host-mtd/host/lib:/home/thomas/projets/outputs/t/per-package/host-util-linux/host/lib]
>   0x000000000000000c (INIT)               0x402000
>   0x000000000000000d (FINI)               0x40bb08
>   0x0000000000000019 (INIT_ARRAY)         0x412dc0
>   0x000000000000001b (INIT_ARRAYSZ)       8 (bytes)
>   0x000000000000001a (FINI_ARRAY)         0x412dc8
>   0x000000000000001c (FINI_ARRAYSZ)       8 (bytes)
>   0x000000006ffffef5 (GNU_HASH)           0x400308
>   0x0000000000000005 (STRTAB)             0x4009b8
>   0x0000000000000006 (SYMTAB)             0x400340
>   0x000000000000000a (STRSZ)              781 (bytes)
>   0x000000000000000b (SYMENT)             24 (bytes)
>   0x0000000000000015 (DEBUG)              0x0
>   0x0000000000000003 (PLTGOT)             0x413000
>   0x0000000000000002 (PLTRELSZ)           1464 (bytes)
>   0x0000000000000014 (PLTREL)             RELA
>   0x0000000000000017 (JMPREL)             0x400e58
>   0x0000000000000007 (RELA)               0x400db0
>   0x0000000000000008 (RELASZ)             168 (bytes)
>   0x0000000000000009 (RELAENT)            24 (bytes)
>   0x000000006ffffffe (VERNEED)            0x400d50
>   0x000000006fffffff (VERNEEDNUM)         2
>   0x000000006ffffff0 (VERSYM)             0x400cc6
>   0x0000000000000000 (NULL)               0x0
> 

I've done that and found that in the troubling case the RPATH is empty. 
This might be a problem of a custom wrapper I use which creates multiple 
images in different output folders. Digging deeper will take some time, 
thanks for the pointer!


regards,
Andreas

> Thanks a lot!
> 
> Thomas
> 




More information about the buildroot mailing list