[OpenWrt-Devel] python ctypes.util.find_library cannot find libc

[Alexandru Ardelean]

Will give it a try.

On Mon, Jan 16, 2017 at 9:41 PM, Andrew McConachie <andrew at depht.com> wrote:
> Hi Alexandru and 郭涛,
>
> Attached is the Makefile I made for python-iptables. I can work around this
> by hardwiring library locations in the source of python-iptables, but I'd
> rather do it the correct way. To reproduce this build an OpenWrt system with
> this Makefile and then just create a simple Python script with 'import
> iptc'.
>
> I am cloning OpenWrt from Github and running make menuconfig;make to build
> everything. My Github version is about 6 days old with the last commit at
> 5ba298c.
>
> I also found that /proc/sys/kernel/modprobe contains /sbin/modprobe, while
> the modprobe binary is at /usr/sbin/modprobe. According to the Debian man
> page on proc(5), /proc/sys/kernel/modprobe should point to the modprobe
> binary. Googling about seems also to suggest that this file should contain
> the location of the modprobe binary. So I would say this is also a bug.
>
> Thanks!
> --Andrew
>
>
> On 1/16/17 07:23, Alexandru Ardelean wrote:
>>
>> Hey Andrew & 郭涛
>>
>> Sorry I did not answer sooner.
>>
>> @Andrew: do you have a Makefile for the python-iptables packages ?
>> I'd like to try to build it and see the issue. Or, are you just using
>> that .py file ?
>> Can you give a bit more input on which Python version you're using,
>> and which OpenWrt version?
>>
>> If the issue is still present in the current packages trunk, I'd like to
>> fix it.
>> And if  郭涛's fix works, we can apply it to trunk.
>>
>> Thanks
>> Alex
>>
>>
>> On Mon, Jan 16, 2017 at 6:23 AM, 郭涛 <guotao945 at gmail.com> wrote:
>>>
>>> I also meet this issue.
>>> I fixed it using below change
>>>
>>>
>>> https://github.com/gt945/Netgear-D7800-Openwrt-Packages/commit/fab71ca0ebf36d5f7b495b96f14d459e794b7224
>>>
>>>
>>> 2017-01-13 0:43 GMT+08:00 Andrew McConachie <andrew at depht.com>:
>>>>
>>>> Hi OpenWRT Devs,
>>>>
>>>> I'm building an OpenWRT package for python-iptables for a project I'm
>>>> working on and getting this error message when attempting to use it.
>>>>
>>>>      import iptc
>>>>    File "/usr/lib/python2.7/site-packages/iptc/__init__.py", line 10, in
>>>> <module>
>>>>      from ip4tc import (is_table_available, Table, Chain, Rule, Match,
>>>> Target,
>>>>    File "/usr/lib/python2.7/site-packages/iptc/ip4tc.py", line 13, in
>>>> <module>
>>>>      from xtables import (XT_INV_PROTO, NFPROTO_IPV4, XTablesError,
>>>> xtables,
>>>>    File "/usr/lib/python2.7/site-packages/iptc/xtables.py", line 677, in
>>>> <module>
>>>>      _optind = ct.c_long.in_dll(_libc, "optind")
>>>> AttributeError: 'NoneType' object has no attribute '_handle'
>>>>
>>>> You can view xtables.py here if you're curious.
>>>> https://github.com/ldx/python-iptables/blob/master/iptc/xtables.py
>>>>
>>>> The problem is that my python-iptables package cannot find libc
>>>> functions
>>>> using ctypes.util.find_library(). I've tried building OpenWRT using both
>>>> musl and eglibc but neither work. I've also tried building OpenWRT with
>>>> objdump and ldconfig. When I include ldconfig via 'make menuconfig' it
>>>> doesn't actually populate my OpenWRT image with an ldconfig binary.
>>>> Maybe
>>>> this is the problem?
>>>>
>>>> This bug report looks similar to my problem, but it's about MIPS and
>>>> marked
>>>> as closed.
>>>> https://dev.openwrt.org/ticket/20123
>>>>
>>>> Any help or pointers would be much appreciated.
>>>>
>>>> Thanks,
>>>> Andrew
>>>> _______________________________________________
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>>>> openwrt-devel at lists.openwrt.org
>>>> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
>>>
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>
>
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