[Freeswitch-users] Latest FreeSWITCH pull and Lua

[Anthony Minessale]

try getting latest master and doing make lua-reconf then make
mod_lua-install



On Thu, Dec 12, 2013 at 5:51 PM, James Mortensen <
james.mortensen at synclio.com> wrote:

> Here's what I've since discovered:
>
> - Verified FreeSWITCH uses Lua 5.2.2 -
> see freeswitch/src/mod/languages/mod_lua/lua/lua.h
> - Manually built and compiled the same Lua 5.2.2 for the system Lua
> - Downloaded and compiled from source the latest LibXml using the Lua
> 5.2.2 development headers.
>
> gcc -shared -fPIC -Wl,-E -o LuaXML_lib.so LuaXML_lib.c
> -I/mnt/src/lua/lua-5.2.2/src
>
> - Copied the .so binary to /usr/local/lib/lua/5.2/LuaXML_lib.so.
>
>
> Afterwards, verify the system Lua can load the library:
>
> test.lua:
>   print('hello world from lua')
> require('LuaXML')
> print(_VERSION)
> print("---\nREADY.")
>
> ubuntu at fs#  lua /mnt/scripts/test.lua
> hello world from lua
> Lua 5.2
> ---
> READY.
>
>
> The library loads without incident.  But, when we try to run the same test
> script from the CLI, we get the following:
>
> freeswitch at ip-10-166-245-111> lua test.lua
> hello world from lua
> 2013-12-12 23:21:08.515046 [ERR] mod_lua.cpp:199 error loading module
> 'LuaXML_lib' from file '/usr/local/lib/lua/5.2/LuaXML_lib.so':
>  /usr/local/lib/lua/5.2/LuaXML_lib.so: undefined symbol: lua_gettop
> stack traceback:
> [C]: in ?
>  [C]: in function 'require'
> /usr/local/share/lua/5.2/LuaXML.lua:1: in main chunk
> [C]: in function 'require'
>  /opt/freeswitch-1.5.8-2013-12-11/scripts/test.lua:2: in main chunk
>
> -ERR Cannot execute script
>
> freeswitch at ip-10-166-245-111>
>
>
>
> Now, I'm not sure what the issue is, but if the library compiles and even
> runs with the same Lua version that's embedded in FreeSWITCH, why would it
> not work when called from within FreeSWITCH?
>
>
>
> James
>
>
> On Thu, Dec 12, 2013 at 12:02 AM, James Mortensen <
> james.mortensen at synclio.com> wrote:
>
>> Okay, so I figured out that the multiple Lua VMs detected is because the
>> version of Lua was slightly different than the compiled .so file for
>> LuaXML_lib, even though it said it was the right version. So I recompiled
>> it and added it into the /usr/local/lib/lua/5.2 folder, and I put
>> LuaXml.lua into /usr/local/share/lua/5.2.
>>
>> Now, I'm seeing these undefined symbol errors and will need to tackle
>> this next:
>>
>> 2013-12-12 07:41:53.395054 [ERR] mod_lua.cpp:199 error loading module
>> 'LuaXML_lib' from file '/usr/local/lib/lua/5.2/LuaXML_lib.so':
>>  /usr/local/lib/lua/5.2/LuaXML_lib.so: undefined symbol: lua_gettop
>> stack traceback:
>> [C]: in ?
>>  [C]: in function 'require'
>> /usr/local/share/lua/5.2/LuaXml.lua:1: in main chunk
>> [C]: in function 'require'
>>  /opt/freeswitch/scripts/parser.lua:2: in main chunk
>>
>>
>>
>>
>>
>> James
>>
>>
>>
>> On Wed, Dec 11, 2013 at 6:26 PM, James Mortensen <
>> james.mortensen at synclio.com> wrote:
>>
>>> Just to update this thread, I created the following Lua script:
>>>
>>>  print('hello world from lua')^M
>>> print(_VERSION)
>>> print("---\nREADY.")
>>>
>>> and then ran it from the CLI.  The output was:
>>>
>>> freeswitch at fs> lua test.lua
>>> hello world from lua
>>> Lua 5.2
>>> ---
>>> READY.
>>>
>>>  Also, I found part of the answer to my problem. FreeSWITCH Lua was
>>> updated to 5.2 on Nov 12th, 2771498707c194c70cf25ad9473be66ef59cfb46, so I
>>> went ahead and grabbed the corresponding LuaXml library for version 5.2 not
>>> 5.1.
>>>
>>>
>>> 2013-12-12 02:12:42.615049 [ERR] mod_lua.cpp:199 multiple Lua VMs
>>> detected
>>> stack traceback:
>>> [C]: in ?
>>>  [C]: in function 'require'
>>> /usr/local/share/lua/5.2/LuaXml.lua:1: in main chunk
>>> [C]: in function 'require'
>>>  /opt/freeswitch/scripts/parser.lua:2: in main chunk
>>>
>>> So now it's a matter of tracing down this error, which is where this
>>> mailing list post left off:
>>> http://freeswitch-users.2379917.n2.nabble.com/Not-really-a-Freeswitch-issue-but-td7595250.html
>>>
>>> I'll keep pounding away at this and update the list once I figure it out.
>>>
>>>
>>> James
>>>
>>>
>>> On Wed, Dec 11, 2013 at 4:05 PM, James Mortensen <
>>> james.mortensen at synclio.com> wrote:
>>>
>>>> Hello,
>>>>
>>>> I just ran git pull and rebuilt FreeSWITCH, and now Lua is unable to
>>>> locate the LuaXml library.
>>>>
>>>> module 'LuaXml' not found:
>>>> no field package.preload['LuaXml']
>>>>  no file '/usr/local/lib/lua/5.2/LuaXml.so'
>>>> no file '/usr/local/lib/lua/5.2/loadall.so'
>>>>  no file './LuaXml.so'
>>>>
>>>> and another:
>>>>
>>>> module 'LuaXml' not found:
>>>> no field package.preload['LuaXml']
>>>>  no file './LuaXml.so'
>>>> no file '/usr/local/lib/lua/5.1/LuaXml.so'
>>>> no file '/usr/lib/x86_64-linux-gnu/lua/5.1/LuaXml.so'
>>>>  no file '/usr/lib/lua/5.1/LuaXml.so'
>>>> no file '/usr/local/lib/lua/5.1/loadall.so'
>>>>
>>>> Note that in /usr/local/lib/lua/5.1 there is a LuaXML_lib.so, but no
>>>> LuaXml.so.
>>>>
>>>> Those are example of one of the many error messages the system has been
>>>> spitting out at me.  Tt's complaining about not finding a LuaXml.so despite
>>>> none actually existing on the box and despite following the instructions in
>>>> the wiki.
>>>>
>>>> I already followed the instructions in
>>>> http://wiki.freeswitch.org/wiki/Mod_lua for installing LuaXml via the
>>>> luarocks package manager, so since that didn't work I tried including the
>>>> library manually from the luaxml website.  Although the lua on the box can
>>>> run the test.lua script successfully, I am not having luck in FreeSWITCH.
>>>>
>>>> I also tried recompiling from scratch running the bootstrap and
>>>> configure scripts.  No luck.
>>>>
>>>> I've also tried installing both Lua 5.1 and Lua 5.2.  I realize the
>>>> wiki shows 5.1 being used, but I already tried that and moved onto trying
>>>> other things.  Still working on trying to figure out what happened, but
>>>> wanted to see if anyone else is having any trouble with this as well.  I
>>>> realize Lua is embedded in FreeSWITCH, so I'm a bit confused about why it
>>>> can't find the library.
>>>>
>>>> Using lua 5.2 on the box, I can run the test.lua script that users the
>>>> library, what version of Lua does FreeSWITCH use?  I'm not convinced it's
>>>> using an embedded version of Lua based on the fact that I see it trying to
>>>> use the paths from the Lua installed from apt-get.
>>>>
>>>>
>>>> James
>>>>
>>>>
>>>>
>>>
>>
>
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-- 
Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬

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